CA2035015A1 - Non-reusable hypodermic syringe - Google Patents
Non-reusable hypodermic syringeInfo
- Publication number
- CA2035015A1 CA2035015A1 CA002035015A CA2035015A CA2035015A1 CA 2035015 A1 CA2035015 A1 CA 2035015A1 CA 002035015 A CA002035015 A CA 002035015A CA 2035015 A CA2035015 A CA 2035015A CA 2035015 A1 CA2035015 A1 CA 2035015A1
- Authority
- CA
- Canada
- Prior art keywords
- plug member
- barrel
- piston
- plug
- syringe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
- A61M5/5013—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M2005/3128—Incorporating one-way valves, e.g. pressure-relief or non-return valves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/3129—Syringe barrels
- A61M2005/3132—Syringe barrels having flow passages for injection agents at the distal end of the barrel to bypass a sealing stopper after its displacement to this end due to internal pressure increase
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
- A61M5/5013—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
- A61M5/504—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the fluid passageway
- A61M2005/5046—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the fluid passageway automatically, e.g. plug actuated by the piston head, one-way valve
- A61M2005/5053—Valve or plug actuated by fluid flow or fluid pressure allowing initial filling of the syringe
Abstract
PATENT
ABSTRACT OF THE DISCLOSURE
A single use disposable hypodermic syringe having a hollow elongated barrel portion, a piston and sealing engagement with an axially translatable along the barrel portion, a piston rod secured to the piston and projecting from the rearward end of the barrel portion for use in reciprocating the piston, a walled chamber disposed proximate the forward end Or the barrel portion and plug means disposed in the chamber and moveable therein from a rearward position to a forward position in response to liquid being forced against the plug member by the piston. The plug member defines fluid passages therein to follow fluid flow about the plug member and an annular flange which cooperates with the interior surface Or the chamber for maintaining the plug member in the rearward position upon air being passed through the fluid passages in response to translation of the piston within the barrel portion. The annular flange also cooperates with a second portion of the chamber wall for permanently maintaining the plug member in the forward position upon the plug member being moved to the forward position by the liquid during ejection thereon from the syringe With the plug member in the forward position, the annular flange thereon seals the fluid passages upon the piston being retracted within the barrel portion toward the rearward and thereof to prevent any additional liquid from being aspirated into the barrel portion Or the syringe about the plug member thereby rendering the syringe non-reusable.
ABSTRACT OF THE DISCLOSURE
A single use disposable hypodermic syringe having a hollow elongated barrel portion, a piston and sealing engagement with an axially translatable along the barrel portion, a piston rod secured to the piston and projecting from the rearward end of the barrel portion for use in reciprocating the piston, a walled chamber disposed proximate the forward end Or the barrel portion and plug means disposed in the chamber and moveable therein from a rearward position to a forward position in response to liquid being forced against the plug member by the piston. The plug member defines fluid passages therein to follow fluid flow about the plug member and an annular flange which cooperates with the interior surface Or the chamber for maintaining the plug member in the rearward position upon air being passed through the fluid passages in response to translation of the piston within the barrel portion. The annular flange also cooperates with a second portion of the chamber wall for permanently maintaining the plug member in the forward position upon the plug member being moved to the forward position by the liquid during ejection thereon from the syringe With the plug member in the forward position, the annular flange thereon seals the fluid passages upon the piston being retracted within the barrel portion toward the rearward and thereof to prevent any additional liquid from being aspirated into the barrel portion Or the syringe about the plug member thereby rendering the syringe non-reusable.
Description
203~
PATlZ~
.89/~ 73 ~ON-RlæU8A~ Y~D~CPUI~:C ~YRTNO~
Q a ~ ~ Q ~1l Bac~rouna of Th- ~nv~tio~
Tho pr~nt invontion rol3te~ to ~ non-reusabl~
hypodermic ~yrinqe A~ hypodermic ~yrinqes are used for inoculating against infectiou~ di~ea~e~ and ~dmini~tering pre~cribed m~dicine~, th~ ~dvantage~ of a non-rousable syringe are obviou~ With th~ wid~proad u~ oS illicit drugs and the spread of Acquired Immune Defici~ncy Syndrome, commonly known as AIDS, the pr~sent need for ~uch ~ davic~ is acute While efforts have heretofore been made to provide ~uch a device, a~ seen in U S ~Patont No~ 4,781,684, 4,832,693 and 4,850,968, such efforts have not mat with wid~sproad ~ucco~ as a result of dofici~nciQs in the designs of tho mechani~m~ dovoloped to ronder ~yringe~
non-reusable.
A non-reusable syringe chould not only be tamper-proof such that tho moan~ by which th~ d~vico i8 r~nd~rod non-reusable can not be removed, but ~hould al~o ~elf-do~truct without any cooperation o~ th- user For oxample, th~ ~yring~ sAould not roquiro a complotion o~ tho full troko of th~ plungor within th~
barrel of th- ~yring~ to ~and~r tho d~vico inop~rativ~ ~ in tho device~ di wlosed in the fir~t two above-cited patent~, or one could then leavo the barrel of th~ cyringe half full and continue to re-fill th~ upper part of the barrol Socond, it i~ i~portant that a ~yringe bQ capabl~ of acting ~8 an air pump wlthout rendering th~ syringe inoperativo in ord~r to maintain the interior of the vial~ of med$cino at atmosphoric pressure When medicine i8 withdrawn from a ~tandard vial of medicine by a 25~0 ~3~.5 PAI!~NT
189~173 hypodermic ~yringo, a negativo pre~urQ i~ croatod within the vial duo to tho air-tight ~oal~ u~od on ~uch vials. Repsated withdrawal of m~dicin~ from the vial will build up a significant negative pressure within the vial. A~ the hypodermic needle on a ~yringe i8 withdrawn from a vial in ~hich ~uch a nogative pres~:ure has b~en created, air i~ a~pirated into the syringe throuqh the neodle, creating ~mall bubbl~s of air in the liquid medic~n~ with th~ ~yringe which i~ oxtr~mely hazardous with intravenou~ in~oction~. In addition, many in~ction~ raquirs a combination of two m~dicine~ drawn from ~eparata vials. I~ a negative pre~sure i8 allowed to build up within tha vials, contamination and mixing problem~ will result as well as air bubble~. After drawing into the syringe the desired volume oS
medicine from the fir~t vi~l and then inserting tho ~yringe needl~ into ~ ~econd vial which has a negative pr~sure therein, medicin~ will be drawn ~rom tho ~yringe back through the needle into the sscond vial, contaminating the medicine in the ~econd vial and ~aklng an accurato moasuring of the proportions of the two medicin ~ in tho ~yxinge xtrem~ly difficult. To avoid these problem~, it i~ co~mon pr~ctic- with conventional hypodermic syring~ to fir~t draw into th- ~yringo ~ volum~ oS air cqual to the volum~ of ~odicine to be extracted from a particular vial and then inject that mea~urod volum~ o~ air into tho vial. Upon ~ub~equently withdrawing ~n ~qual volumo of medicine from that vial, the pre~sure within the vi~l will be left at atmospheric.
In the ~ingle u~e hypodermic ~yringeQ heretofore devsloped, the mean~ which render ~uch device~ non-reusable will act tc render the ~yringe inoporativo i~ ono woro to attempt to uso it a~ an air pump in ~n af~ort to ~aintain tho interior of the vial at atmospheric pressure. As a re~ult, ~uch devices are not only ~w!~K 2 ''' 203~al~
PAT~NT
~89/~73 highly susceptible to the ingestion of air, but are al~o illsuitod for in~oction~ r~quiring a mixtur~ of m~dicines.
~ ho non-reu~able hypodermic ~yringe di~closed harein provide~ a single solution to all of the above problems by diSferentiating between the den~ity of ~luid~ therein and destructing ~ololy in response to the o~ection of liquid therefrom. The fluid den~ity re~ponsiv~ destruct ~ezhanism of th~ pr~s~nt invontion will not activato upon the passag~ o~ Air into and out o~ th~ ~yrings co that the ~yringe frasly used as an air pump prior to any liquid boing drawn therein to prevent negativ~ pre~suro from building up in the vials of medicine.
However, onc~ a liguid ha6 been drawn into the syringe and even a portion thereof ~ectod, the destruct mechani~m is activated and no additional fluid, air or liguid, can be drawn into the syringe, rend~ring the device inoperable other than to ~joct th~
r~maining l~quid within tho yringo.
~MM~RY or ~ INV~TION
The prosent inv~ntion provides a di~po~a~l~ and non-rsu~able hypodermic syringe. The ~yringo is rendered non-reusablo by ~ean~ of ~ fluid donoity responsive plug means dispos~d in a lower chamber o~ the syringe which, prior to aspirating liguid into th~ syringe, ~llow~ air to freely pass thoreby ~o that tho oyringo can bs u~ed ~ an air pump to maint~in ~tmoaph~ric pr~-ur~ within ~ o~ medicin~. Upon liguid b~ing drawn ~nto the ~yringe and a portion theroof ~jected, thQ plug means i~ driv~n to an activated po~ition by the hydraulic forces acting thereon, whoreupon tho plug means will allow tho liquid to b~ aject0d ~rom tha syringe but pr~vents any further refilling theroof.
~hO 3
PATlZ~
.89/~ 73 ~ON-RlæU8A~ Y~D~CPUI~:C ~YRTNO~
Q a ~ ~ Q ~1l Bac~rouna of Th- ~nv~tio~
Tho pr~nt invontion rol3te~ to ~ non-reusabl~
hypodermic ~yrinqe A~ hypodermic ~yrinqes are used for inoculating against infectiou~ di~ea~e~ and ~dmini~tering pre~cribed m~dicine~, th~ ~dvantage~ of a non-rousable syringe are obviou~ With th~ wid~proad u~ oS illicit drugs and the spread of Acquired Immune Defici~ncy Syndrome, commonly known as AIDS, the pr~sent need for ~uch ~ davic~ is acute While efforts have heretofore been made to provide ~uch a device, a~ seen in U S ~Patont No~ 4,781,684, 4,832,693 and 4,850,968, such efforts have not mat with wid~sproad ~ucco~ as a result of dofici~nciQs in the designs of tho mechani~m~ dovoloped to ronder ~yringe~
non-reusable.
A non-reusable syringe chould not only be tamper-proof such that tho moan~ by which th~ d~vico i8 r~nd~rod non-reusable can not be removed, but ~hould al~o ~elf-do~truct without any cooperation o~ th- user For oxample, th~ ~yring~ sAould not roquiro a complotion o~ tho full troko of th~ plungor within th~
barrel of th- ~yring~ to ~and~r tho d~vico inop~rativ~ ~ in tho device~ di wlosed in the fir~t two above-cited patent~, or one could then leavo the barrel of th~ cyringe half full and continue to re-fill th~ upper part of the barrol Socond, it i~ i~portant that a ~yringe bQ capabl~ of acting ~8 an air pump wlthout rendering th~ syringe inoperativo in ord~r to maintain the interior of the vial~ of med$cino at atmosphoric pressure When medicine i8 withdrawn from a ~tandard vial of medicine by a 25~0 ~3~.5 PAI!~NT
189~173 hypodermic ~yringo, a negativo pre~urQ i~ croatod within the vial duo to tho air-tight ~oal~ u~od on ~uch vials. Repsated withdrawal of m~dicin~ from the vial will build up a significant negative pressure within the vial. A~ the hypodermic needle on a ~yringe i8 withdrawn from a vial in ~hich ~uch a nogative pres~:ure has b~en created, air i~ a~pirated into the syringe throuqh the neodle, creating ~mall bubbl~s of air in the liquid medic~n~ with th~ ~yringe which i~ oxtr~mely hazardous with intravenou~ in~oction~. In addition, many in~ction~ raquirs a combination of two m~dicine~ drawn from ~eparata vials. I~ a negative pre~sure i8 allowed to build up within tha vials, contamination and mixing problem~ will result as well as air bubble~. After drawing into the syringe the desired volume oS
medicine from the fir~t vi~l and then inserting tho ~yringe needl~ into ~ ~econd vial which has a negative pr~sure therein, medicin~ will be drawn ~rom tho ~yringe back through the needle into the sscond vial, contaminating the medicine in the ~econd vial and ~aklng an accurato moasuring of the proportions of the two medicin ~ in tho ~yxinge xtrem~ly difficult. To avoid these problem~, it i~ co~mon pr~ctic- with conventional hypodermic syring~ to fir~t draw into th- ~yringo ~ volum~ oS air cqual to the volum~ of ~odicine to be extracted from a particular vial and then inject that mea~urod volum~ o~ air into tho vial. Upon ~ub~equently withdrawing ~n ~qual volumo of medicine from that vial, the pre~sure within the vi~l will be left at atmospheric.
In the ~ingle u~e hypodermic ~yringeQ heretofore devsloped, the mean~ which render ~uch device~ non-reusable will act tc render the ~yringe inoporativo i~ ono woro to attempt to uso it a~ an air pump in ~n af~ort to ~aintain tho interior of the vial at atmospheric pressure. As a re~ult, ~uch devices are not only ~w!~K 2 ''' 203~al~
PAT~NT
~89/~73 highly susceptible to the ingestion of air, but are al~o illsuitod for in~oction~ r~quiring a mixtur~ of m~dicines.
~ ho non-reu~able hypodermic ~yringe di~closed harein provide~ a single solution to all of the above problems by diSferentiating between the den~ity of ~luid~ therein and destructing ~ololy in response to the o~ection of liquid therefrom. The fluid den~ity re~ponsiv~ destruct ~ezhanism of th~ pr~s~nt invontion will not activato upon the passag~ o~ Air into and out o~ th~ ~yrings co that the ~yringe frasly used as an air pump prior to any liquid boing drawn therein to prevent negativ~ pre~suro from building up in the vials of medicine.
However, onc~ a liguid ha6 been drawn into the syringe and even a portion thereof ~ectod, the destruct mechani~m is activated and no additional fluid, air or liguid, can be drawn into the syringe, rend~ring the device inoperable other than to ~joct th~
r~maining l~quid within tho yringo.
~MM~RY or ~ INV~TION
The prosent inv~ntion provides a di~po~a~l~ and non-rsu~able hypodermic syringe. The ~yringo is rendered non-reusablo by ~ean~ of ~ fluid donoity responsive plug means dispos~d in a lower chamber o~ the syringe which, prior to aspirating liguid into th~ syringe, ~llow~ air to freely pass thoreby ~o that tho oyringo can bs u~ed ~ an air pump to maint~in ~tmoaph~ric pr~-ur~ within ~ o~ medicin~. Upon liguid b~ing drawn ~nto the ~yringe and a portion theroof ~jected, thQ plug means i~ driv~n to an activated po~ition by the hydraulic forces acting thereon, whoreupon tho plug means will allow tho liquid to b~ aject0d ~rom tha syringe but pr~vents any further refilling theroof.
~hO 3
2~3~01~
PAT~NT
In ona embodim~nt o~ the invention, th0 fluid respon~ive plug means compri~e~ n pair of axially aligned plug member~ disposed in th- lower chambor of th~ ~yringe. ~h~ upper plug numbQr i~ axially move~ble within th- chambQr by mQans of the hydraulic force~ acting ther~on during liquid ejection from a rai~ed inactiv~ po~itlon to a low~r activo po~ition. ~he upper plug member define~ a fl~id flow channel extending axially through tbe upper portion thoreof, a conical r~ces~ ~xtending rearwardly from the underside thereof which communiaates with the flu$d flow channel at it~ apex, and an annular re6ilient flang~
which proj~ct~ outwardly ~rom the plug member and b~ars against the chambor wall. Th~ re~ nt rlang~ cooperat~ with tho surface of the chamber wall, fir~t to retain the plug member in the raised inactivo po~ition both prior to U8Q and while air is aspirated into and ejected from th~ syringe through ths flow channQl in the plug member ~o that th~ ~yringo can bs u~ed as an air pump, and socond, to ~ecure permanently the plug member in the lower active position upon a volume of liquid having been a~pirated into th~ ~yring~ and the plug member driv~n to said activ~ position by th~ e~ection of ~aid liguid.
Tho lower plug member i8 di~posed within the chamber ~elow the upper plug member and i8 axially moveabl0 therein in an aroa below the upp~r plug ae3ber. ~he lower plug m0mbsr d~fin~
a conical ~xten~ion on th~ upper ~nd thereof which ext~nds into th~ conical r~ce~ in th~ uppQr plug m~mber such that upon th0 upper plug memb~r being driven to th~ lower~d activ~ position, the lower plug memb~r allow~ air or liquid to be e~ected from the syringe but pr~vent~ return fluid channel ~luid ~low into the syringe. The lower plug memb~r al~o defines fluid flow passageway~ in the side wall~ and th~ under6ide thereof to IU~1/2540 4 203~Q~
PAT~NT
communicat:e the hypodermic needle carriad by the forward end of the oyringe with the ~rea between the two plug mombers.
Prior to drawing ~luid into the ~yringo throuqh the hypodermic needle theroon, the upper plug member i~ beld in the elevated po~ition by the annular flango therQon bearing against the chamber wall. In this po~ition, thc pi~ton di~posed within the syrings above the upper plug member can ba moved upwardly and downwardly to draw and expel air into and out o~ the syringe through the hypodermic needlo. As the pi~ton i8 moved downwardly within the ~yringe, air iB forced through the fluid flow channel in the upper plug member into the conical rece~s in the lower portion thereo~, about the lower plug member and i~ expellsd through tho hypod~rmic n~odl~. Upward movoment of the piston effect~ an oppo~ito pa~sage of air into the ~yringe.
Upon inserting the hypodermic needl~ into ~ v$al o~
liquid medicine and raising tho pi~ton within the ~yringe, the liquid i~ drawn upwardly into the ~yringe about the lower plug mombQr and through th~ uppor plug member into the ar~a within the ~yringe botw~on the piston ~nd the upper plug member. As the pi~ton 1~ puoh-d downwardly to ~-ot tb- m-dicino, ~h- hydraulic forco of th0 liquid acting again~t th~ uppor aur~aco o~ tho upper plug member causes the uppor plug m~mber to mov~ downwardly, whereupon tho annular flango thareon pa~se~ ovcr a radially ~xtending ~houlder ~ormed in tha chambor wall into an onlarqed diamotor portion of the chambor and flexQ~ outwardly.
Concurrently, the liquîd pa~ofi through tho channel in the upper plug mombor into tho roco~ in th~ undor~ido ther~o~, about tho lower plug me~bor and into and out o~ th~ hypodermic needl~. The force of the liquid flow pa~sing through the upper ~lug member and again~t the lower plug ~embor, m~intains tho lowor plug IWI/25~.0 5 2~3~01~
PATENT
~astl73 member in low~red po~ition within the chamb~r 60 that the conical oxtension thereon will not block the downward flow of any of ths liquid through tho uppor plug membor to the ne~dl~
Upon the upper plug member having been movod downwardly such that the annular flange thoroon pas~ into the ~nlargQd diamat~r portion of the chamb~r, ~ny 0ub~0quont r~traction of the pi~ton will not affect further a~piration of fluid into the ~yringo regardle~s of whoth~r or not all of th~ liguid has been in;ected through tho hypodermic needle Such retraction of the pi~ton will create a pressure drop in the ~yringo bolow tha pi~ton, causing the lowor plug member to ~ovo rearwardly against the underside o~ the upper plug member which i~ prsvented from moving rearwardly by th- abutment Or tho annular flange thoreon with the aforesaid ahouldor in tho chamber wall When the lower plug m~mber abut~ the upper plug momber the conical extension on tho lower plug m~ber will ooal the lowor ond of tho fluid flow channel extending through the uppor plug member, rendering tho ~yringe non-ro~illable and thuo non-rou~a~le ~ n ~ oocond ~bodim~nt of tho invontion, a ~inglo plug member la dispos~d in a lowor chambor of tho Dyringe wh~ch i8 axi~lly movoablo thoroin by th- hydr~ulic force~ acting thoreon during liquid ~oction from e raiaed inactiv~ position to a lower active po~ition Tho plug membor define~ a rosilient flange which projact~ outwardly from tho underside~ tharooS and cooporate~ w$th the intorior wall ~urSaco oS the chambor, first to r~tain the plug mamber in th~ ra~d inactive po~ition both prior to u~e and while ~ir i~ aspirat~d into and e~ected from the syringe B0 that th~ ~yringe can be used a~ an air pump, and ~econd, to rstain tho plug me~ber in the lower active posltion upon a volume of liquid having been aspirated into the syringe ~ o 6 203~
PA~NT
and the plug member driven to said activa position by the o~oction Or ~aid liquid. In the rai~od inactive position air i8 free to pass through the lower ~yringe chamber and about the plug member~ therein by mean~ of fluid flow pas~ageway~ rormed in the upper perimeter portion of the plug member and in the lower surface of the resilient flange. In the lower active po6ition, any withdrawal of th- pi~ton in an effort to draw sdditional liguid into the ~yring- will dr~w the plug ~ember rearwardly within the chamber cau~ing ~ ~ealing onqagement of the resilient flange with a ~houlder formed in the chamber wall, pr~venting further aspiration of fluid into the ~yringe and thereby rondering the devico non-reusable.
IN TH~ DRA~IN~B
~ i~uro ~ i~ a ~ectional viow of the hypodermic syring~
of the pre~ent inv-ntion a- fiuid i~ boing drawn therein.
~ igur~ a s0ctional view of the lower portion of tho hypodora~c ~yringo Or tho prosent invention ~howing the relative po~itioning of the plug membQrs as liquid i~ beinq ajected from th- ~yringe.
rigur- 3 i~ A partial ~ectional view of th~ lower portion of th~ hypodermic ~yringo o~ the prQsent lnvention during an attemptod refilling o~ tho yringo.
rl~ur~ a partial ~octional vi~w of lower portion of a modified form of th~ pr~ont invention.
r~ur- S is prospective view of tho lower plug members Or the pres-nt invention.
Jigur- ~ ia a view taken along lino 6-6 in Figure 5.
~JI/25~0 7 2~3~
l?Aq~l!:Nq!
~.89/173 r~ gur- 7 is ~ ~ectional view o~ a ~econd embodiment o~
the present invontion showing tho po~ition of the plug member prior to liquid beon drawn theroin.
~ iqur- 8 i~ a partial ~ectional ~iew of th~ lower portion o~ cond embodi~ent of th~ pro~ent invention showing the po~ition of tho plug membor ~ liquid i~ b~ing ~Qctod from the syringo.
Flgur- ~ is ~ parti~l ~octional view o~ th~ lowor portion o~ a ~econd embodiment of the prosent invention showing the position o~ the plug momber durinq an attemptad re~illing o~
the ~yringe.
~ igur- 10 i~ a porspoctivo view o~ tho plug member of the ~econd ombodi~ent o~ the invention.
D~BCRIPTION OY T~ PR~R~p ~MBQ~IM~N~a The non-rousablR hypodermic ~yringo 10 o~ th~ pr~sent invention includo~ ~ cylindrical barrel 12, a double-landod pi~ton 14 ~nd ~ plung~r rod 16 for u~o in r~ciprocating the piston 14 within barrol 12. Rod 16 d~fino~ a gripping flango 17 on tho re~rward nd thoraof and ia prorerably ~ecured to the pi~ton 14 ~t ~t~ forward ond by mo~n- of an ~nlarged tapa~ed portion 18 hold within ~ aorre~pondingly configured rocea~ 20 in the rearward portion of pi-ton 14. An upper plug momber 22 ia di~po~ed below pi~ton 1~ within ~ cha~bor 23 de~ined by the lower portion of b~rrel 12 and a barr-l cap 26. A lower plu~ memb~r 24 iR dispo~ed in chamber 23 axially below plug member 22. Barrel cap 26 i~ perman-ntly af~ixod to tho lower ond of barrel 12 by heat bonding on a ~uitable adhe~ivo, and a hypodermic noedle 28 i~ permanently secured within a hollow ~xtension 30 extending from barral cap 26.
~w/2s~0 8 ~3~
~AT~N~
The ~yringe barrel 12, which i~ preferably constructed of a transparent durable plastic material, defines an outwardly extending radial flange 32 at the upper end thereof, a constant diameter upper portion 34 within wh$ch piston 14 i8 axially translatable, a lower portion 36 wh~ch defin~s the interior wall of chambor 23 and an intermediary annular horizontal ond wall 38 A stop ring 39 i~ provided at thQ rearwardmost ond o~ barrel 12 to pravent withdrawal of tha pi~ton fro~ the barrel 80 a8 to preclude acces~ to the interior of the barrel.
The upper plug member 22, preferably constructed of a rubber material includes hn onlarged diameter upper portion 40, a body portion 42, a ~houldor 44 di~posed th~rebetween, a r~silient annular flange 46 extending outwardly from the lower end thereof, and a fluid channol 48 extending ~xially therethrough and communicating with a conical rece~s 50.
Shoulder 44 i~ adaptod to abut a fir~t shouldex 52 defined by the lower portion 36 of barrel 12 in chamber 23 to limit the downward movement of the upper plug member 22 within chamber 23. As ~n in Figure 1, th~ resilient annular flango 46 ~xtend~ outw~rdly and upwardly from the lowor end of plug member 22 ~uch that when the uppar plug member 22 i8 in the raised inactive position, fl4ng~ 46 flox~s outwardly and baars against ~id~ wall 54 in chamber 23 and ~buts a ~econd should~r 56 defined by the lower portion 36 o~ barr~l 12 in chamber 23 to limit the upward trav-l of plug member 22 within chamber 23. Th~ lower portion 36 o~ syringe barr~l 12 ~l~o d~fin~ a third interior ~houlder 58 in chamb~r 23 locat~d botw~en ~ide wall 54 and a lower ~id~ wall 59 di~po~sd about an ~nlarged diameter portion 60 of chamber 23 ad~ac~nt tha lower end 62 oi barral 12.
~ 2540 ~?
2~3~
PA~R~T
1~19/17 3 The lower plug member 24, also pre~rably constructed of a rubblsr material, io di~poscd axially b~low upper plug member 22 in cha~b~r 23. ~owor plug mombor 24 d~ine~ a lower base portion 64, and ~ conical extension 66. Lsw~r ba~e portion 64 define~ a diametor 1~8 than the inn~r diameter of ~nd cap 26 to allow fluid flow therebetween but graater than th~ inner diameter of barrel 12 at the ond 62 thereo~ ~o a~ to be axially translatable within chamb~r 23 b~twa~n the lower ~nd wall 63 of barrel cup 26 and the lower Qnd 62 o~ barral 12. Ext~nsion 66 proj~ct3 upwardly from ba~e portion 64 into the recess 50 in the upper plug mcmb~r 22, and i~ configur~d ~o as to abut and mate with tho conical ~ide wall of rece~ 50 upon ths plug member~
being forced togothQr ~o a~ to ~oal the lower end of fluid channol 48 in th- uppor plug m-mbQr 22 to prevent fluid flow therothrough. A~ ~eon in Figure 5 and 6, fluid passages 68 are formed in tho side and bottom wall~ o~ tho lower plu~ msmber 24 ~o ~8 to communicat~ the hypodermic n~odl~ 28 with tho portion of chamber 23 abova th~ lowor plug memb~r 24 ~o a~ to allow fluid flow therob~twoQn a~out lowor plug m-mbQr 24 wh~n th~ lower plug member i8 in it~ low~rmo~t po~ition against ond wall 63 of barrel cap 26.
Pr~o~ to any ~luid bcin~ ~r~wn into th~ ~yrlnge 10 through neodl~ ~8, th~ upper plug ~ombar i~ in tho rai~ed position in ohambor 23 as illu~t~tad in Figur~ 1. In thi~
po~ition, tho ~yring~ lO can bo us~d as an air pump by mean~ of pi~ton 14, as the downwar~ movemQnt of pi~ton 14 will force air in barrel 12 through chambor 23 via the channel 48 in the upper plug member 22, about tho lowor plug member 24 and out ne~dle 28, but will not creat~ ~uf~icient forc- again~t the upper ~nd o~
plug member 22 to ~ov~ the plug ~ember downwardly within chamber II,W/25~0 10 - ` 2~3~
PA~M~
1~9/173 23. Accordingly, i~ one n~eded an in~ction o~, for example, 20 units of medicine, the u~er would retract the piston to a point slightly above the 20 unit mark on tho barrel (not shown), insert the needle into the liquid medicine in the vial through the standard ~eal thereon, push tho pi-ton back down to wall 38 to drive a volume of air ~lightly in OXCR~9 of 20 unit~ into the vial and retract the p$ston to tho point slightly above the 20 unit mark to draw lightly ov~r 20 units of medicino into th~
barrel of the ~yringe. Tho ~yringe i~ then h~ld in an invertod position with the neodle pointing upwardly, and tho pieton i~
again pushed back to th~ 20 unit mar~, ejecting the excess medicine from the n~edle a~ well a~ any air remaining in tho syringe. The syringe i~ then ready to in;ect the measured 20 unit~ of medicino into the u~r ~nd, duo to the air pumping capability of tho ~yringe, th~ intorior of the vial of medicin~
ft at atmospheric pres~ure.
AA the piston 14 i8 then driven downwardly during the in~oction, tho liquid medicine i~ forc~d through the channel 48 in th~ upp-r plug m~ber 22, about the low~r plug momber 24 through th~ fluid pa~ag~ 68 th~roin and into and out of the hypodermic ne~dl~ 28. Concurr~ntly, the hydraulic forces created during the in~ction by th~ liquid b~ing driven by the piston ~ct on th~ ffectivo uppsr surf~c~ area~ of tho uppor ~nd lower plug member~ 22 and 24 to drivo the upper plug member 22 downwardly within cha~ber 23 to tha position illustrated in Figure 2 and the lower plug member 24 downwardly ~gain~t the lower end wall 63 of cap member 26. A~ ~h~ re~iliont flanqo 46 on the upper plug member 22 pas~Q~ the ~houlder 58 in chambor 23, the flange flexe~
outwardly within the enlarg0d diameter portion 60 o~ chamber 23 and bear~ again8t the ~id~ wall 59 o~ th~ ~nlarged diam~ter wo 11 2~3~0~ 5 PAT~NT
portion 60 o~ chamber 23 ~he upp0r and lower plug mRmbers will thon r~main in thi~ po~ition during the injection If, either after the completion oS the in~ection or during the injection, one were to att~mpt to retract tho pi~ton 14 within the barrel to a~pirate mor~ liquid into the ~yr$ng~ through needlo 28, the re~ultant vacuum created within th- b~rrel below the piston 14 would draw the upper and low~r plug m~mber~ upwardly to tho positions illustrated in Figure 3 The upward travel o~ upper plug member 22 durin~ ~uch ~n attompted rqfill would be limitod by tho abutment oS the flang~ 46 theroon with ~houlder 58 in chamb~r 23, while the conical exten~ion 66 on tho lower plug member 24 would be drawn into rece~ 50 and against the upper plug member, ~ealing tho lower end of channel 48, and thereby prev~nting any fluid Slow upwardly through the upper plug member 22 The ~ealing engagement o~ flange 46 with the side wall 59 and ~houlder 58 i~ chamber 23 would prev~nt any upward fluid flow about the upper plug membor 22 Accordingly, prior to drawing any liquid into the ~yr$nge 10, the pi~ton can be moved upwardly and downw~rdly within the barrol without eSfocting deactivation of the ~yringe Howevor, once a liquid haa b~on drawn into the ~yring~ and th- pi-ton movod downwardly a ~light di~tanc~
~u~ficiont to cau~ ~ trnn~lation of th~ lower plug mombar 22 a di~tanco ogu~l to axial l~ngth of ~ido wall 54, ~lango 46 cl~ar~
~houlder 58, ~l~xe~ outwardly and the syringe i~ render~d inoperativo, other than to e~oct the ~luid contain~d thor~in without any a~firmstive ~ction or other cooperation of th~ ussr Whilo th~ above mechanism provides a non-reusable ~yringe which cannot be r~filled by the u~er, to dissuade one from continuing to try to make the devic~ function properly or from even attempting to di~as~emble the uyringe to remove the ~UII/2540 12 2~3~
PAT~NT
~89~73 di~abling plug membor~, tho enlarg~d tap~red end 18 o~ thQ
plungor rod 16 by whi¢h the rod i~ ~ecurad to piston 14 is configured to 6eparate from the pi~ton in the evont one were to attompt to draw additional ~luid into tho ~yringe. Once the upper plug member has been driven forwardly to tho lower position by in~ection of liquid from the ~yringe, any ~ub~oquent r~trac-tion Or the piston within the barrel will crsatQ a vacuu~ within the barrel betwoon the piston and upper plug member as a regult of the ~aaling ongagemont~ of ths upper and lower plug member~ 22 and 24. A~ thi~ vacuum increases with the retraction of the piston, the oppo~od forco~ acting on th~ upper and lower end~ of the pi~ton will cau~e the onlarged tapered end 18 of the plunger rod 16 to be pulled out of th~ tapered rece~ed 20 in tho pi~ton, ~oparating th- rod 18 from piston 14 and making the d~truction o~ the syrinqo readily apparont to ths us~r ~o as to dis~uade the user from any further attempt~ to u~e the davice or to try to disa~semble and rocon~truct tho ~yringe. In addition, a washer 80 could be providod on barr~l wall 38 which oxtend~ slightly over tho up~er perimotor ~urface of upper plug member 22 to provant ono from b~ing ablo to ~omehow pull tho plug members from ~ho barr~l. Alternati~oly, ond wall 38 could bo ~xtonded radially inw~rdly to provido tho ~amo function.
Figuro 4 lllu~trates a modifi~d form of th~ abov described embodiment o~ the invention which, whilo operating ~n the sam~ ~annor a~ ths prior ~bodimont, di~fer~ ~lightly from the prior embodimont in the configur~tion of th~ upper plug member 122 and tho lower portion 136 of thG ~yringe barrel 112.
In the ~econd ambodiment, th~ upper plug member 122 which, like the upper plug member 22 of the prior ombodiment, i8 preferably con~tructed o~ a re~ilient rubber material, comprises an enlarged W~/~KO 13 203~013 ~AT~NT
1~9~173 diameter upper radial flango portion 140, a central body portion 142 of reducod diameter, an enlarged lower radial flange portion 146, a central axial ~luid channel 148, and conical recess 150.
~he enlarged low~r flange portion 1~6 i8 sizod ~e a~ to bs in sl~ght compre~sion against a ~ido wall 154 d~fined by bar~el 112 to rotain plug membor 122 in place prior to e~ection o~ liquid th~rethrough and ~uch that upon plug member 122 being forced downwardly by the hydraulic forc~s acting theraon during liquid e~ection, the enlarged lower flange portion 146 will flex outwardly upon clearing a ohoulder 158 definod in the lower portion of the barrel to maintain the plug member 122 in a lowered po~ition and, in combination with a lower ylug number 24, dis~bl~ the syringo from being ~ble to draw additional liquid therein in the 6ame manner as described above with respect to the prior embodim~nt.
In addition, the ~yringe barrel can be modified a~ ~een in Figur~ 4 to provide an inwardly extanding radial flang~ 138 having an upp~r curvalinear surfac~ 139. Flango 138 prevent~
withdrawal of th~ plu~ member~ from the barrol, while tho upper curv~lin~ar urf~ce 139 theroon will ~ t th~ user in allgning any ~ix bubble~ in the ~odicino with the fluid flow channel 148 in the uppor plug momb~r 122 $or ro~oval through needle 28. ~he configur~tion of flang~ 138 can ba u~ed with ~ithor ombodiment of t~ invantion. How~v~r, when u~ing ~lange 138, tha low~r ~urf~ce of th~ piston ~hould bo corresponding configured a~ seen at 114 in Figure 4.
Figur~ 7-10 illu~tr~t- a ~econd ombodiment of the invention which employs only a ~ingle plug member to render the syringe non-r0usabl~. The syringe 200 of the ~econd embodiment differ~ from syringe 10 801ey in the lower portion thereof and ~w/~o 14 203~
~.~19/~,73 accordingly only the lowor portion of ~yring~ 200 will be described. Syringe 200 include~ a barrel 202 de$ining a constant diameter portion 204 within which ~ ~iston 206 i8 di~posed.
Pi~ton 206 i8 preferably provided with a curvalinear lower ~urfaco 208 and i~ carri~d by plunger rod 210. Barrel 202 d~inas a lower ~yringo chamber 211, an annular shoulder 212 dispoQed in chamber 211 and a curvallnear lower surface 214 having a concavo position 216 t~rminating a flat horizontal surface 218 having a c~ntral opening 220 therein. A barre} cap 222 is carried by the lower end of barral 202 and a hypodermic needle 223 i~ carri~d by barrel cap 222 ~uch that it communicat~s with chamber 211 through the op~ning 220 in barrel cap 222.
An annular ~top member 224, preferably constructed of the ~ame durable plastic matorial a~ barrel 202, i~ affixed to th~ interior ~urfac- of barr~l 202 ~o a~ to dafine the upper end of chamber 211. Stop m-mb~r 224 defines a curYalinear upper surface 226 adapted to mate with the correspondingly configured lower ~urfac- 208 of pi~ton 206, a c~ntral opening 22~ therain, a flat horizontal lower ~urfaco 230 and an annular dependinq portion 232 which abuts ~hould~r 212 in chamber 211.
A plug memb~r, prererably 234 con~tructed Or a rubber material, i~ di~po~ed within chamb~r 211, and defines: an upper portion 236, a curv~d downwardly tapered portion 238 which i~
dispo~ed bQlow portion 236 and inwardly ~pacod from the perimeter thereo~, and a r~ nt low~r annular flangs 240 di6po~ed below tapered portion 238. The out~r diameter Or tho upp~r portion 236 oP plug member 234 iD le~8 than the inner diameter derin~d by the interior ~ide w~ll 242 of ~top member 224 ~o a~ to allow ~luid flow therebetw~an. For rea~on~ which will become ~sadily apparent, the diameter of low~r flange 240 in the unflQxed ~tate, ~WI/25f.0 15 ~3~
PATEN~
as ~osn in FigurR 9, i~ greatQr than the inner diam~ter def in~d by intorior ~id~ w~ll 242. Aa ~o~n in Figur~ 9, ~luid passageways 244 and 246 are provided in tho upper surfac- of plug member 234 ~nd in the underside of resilient flange 240 re~pectively to allow for fluid flow about the plug momber.
Alternatively, the fluid passageway~ could be formed in the lower ~urfac- 230 and doponding portion 232 o~ ~top m~mber 224 and in the lower ~urfac~ 214 of barr~l 202 to allow for ~uch flow.
In th~ rais~d inactiv~ poaition illu~trated in Figure 7, flange 240 i~ dispo~d ~ub~tantially adjacent the tapered portion 238 of the plug membor 234, fl0xa6 outwardly and bears against the ~ido wall 242 o ~ to r~tain thQ plug member 234 in th~ r~i~ed inactivo po~ition. Prior to any liquid boing drawn into tho ~yringo 200, tho ~yringe can be used as an air pump, as w~th the prior ombodiment, as ~ir i~ frqe to pa~s through chamb~r 211 about plug m~mber 234 via ~luid pa~sageways 244 ~nd 246 without moving the plug m~mb~r. Upon ~ liguid boing drawn into th~ syringQ and th~ piston 206 being movQd downwardly, the liguid i~ forcsd through chambor 211, about plug membar 234 through the fluid pafisageways 244 and 246 ther~in ~nd out needle 224.
Concurrently, th~ hydrauli¢ for¢o~ acting on plug member 234, forcQ the plug momber downwardly within chamb~r 211, caus$ng flange 240 to movo past tho lowor ond 248 of top mqmber 224 ~nd again~t th- lowor surface 214 o~ tho barr~l 202 to the position illustrated in Figur- 8. A~ ~oon a~ rlang~ 240 clear~ ond 248, it flexes outwardly in the ~nlargod diameter portion 241 of cham~er 211 and the plug ~mber 234 i~ in the activo po~ition.
Ther~aftor, withdraw~l of tho pi~ton 206 in ~n offort to draw moro liguid into th- syringo will ca w e the plug member to be drawn roarwardly within chamber 211 ~uch that the upper surfacQ
~1/25~0 1 6 2~3~
PAT~N~
~89/173 249 of flange 240 will abut the low~r end 248 of ~top member 224 and prevent fluid pa~age ther~betwo~n as ~een in Figure 9, thereby rendering the syringe non-reu~able.
The ~Qnsitivity of th~ ombodiments of the non-reusable syringe of the presont invention i~ determined by th~ axial di~tance the flange 46 on the fir~t mbodiment, tho onlarged flange portion 146 on the modified form thoreof, or the flange 240 on the ~econd embodiment, travel~ before flexing outwardly to ~ecuro the plug member in its lower active position. For example, in the second embodiment this d$~tance d~pends on the axial length of the depending portion 232 of stop member 224. By incr6asing this axial length, or the length of ~ide wall 54 in tho first embodimont, the syringe could be dosigned to allow for ojection of ~ small amount of liguid prior to the plug member being locked in its lower active po~ition. This would provide the usor with ~oms flexibility in the ~vent of inadvertly ejecting ~lightly too much liguid during air expulsion prior to an injection a~ the user could then draw a portion of an additional unit of medicine into the ~yringe to correct the orror.
Variou~ othor ch~nges and modifications may be made in carrying out th~ prasont invention without departing from the ~pirit and ccopo th~r~of. Insofar a~ the~o ch~ngo~ and modifica-tionc arQ within the purv$ew of th~ appendod claims, they are to bo considered a~ part of the present invention.
w~/2~0 17
PAT~NT
In ona embodim~nt o~ the invention, th0 fluid respon~ive plug means compri~e~ n pair of axially aligned plug member~ disposed in th- lower chambor of th~ ~yringe. ~h~ upper plug numbQr i~ axially move~ble within th- chambQr by mQans of the hydraulic force~ acting ther~on during liquid ejection from a rai~ed inactiv~ po~itlon to a low~r activo po~ition. ~he upper plug member define~ a fl~id flow channel extending axially through tbe upper portion thoreof, a conical r~ces~ ~xtending rearwardly from the underside thereof which communiaates with the flu$d flow channel at it~ apex, and an annular re6ilient flang~
which proj~ct~ outwardly ~rom the plug member and b~ars against the chambor wall. Th~ re~ nt rlang~ cooperat~ with tho surface of the chamber wall, fir~t to retain the plug member in the raised inactivo po~ition both prior to U8Q and while air is aspirated into and ejected from th~ syringe through ths flow channQl in the plug member ~o that th~ ~yringo can bs u~ed as an air pump, and socond, to ~ecure permanently the plug member in the lower active position upon a volume of liquid having been a~pirated into th~ ~yring~ and the plug member driv~n to said activ~ position by th~ e~ection of ~aid liguid.
Tho lower plug member i8 di~posed within the chamber ~elow the upper plug member and i8 axially moveabl0 therein in an aroa below the upp~r plug ae3ber. ~he lower plug m0mbsr d~fin~
a conical ~xten~ion on th~ upper ~nd thereof which ext~nds into th~ conical r~ce~ in th~ uppQr plug m~mber such that upon th0 upper plug memb~r being driven to th~ lower~d activ~ position, the lower plug memb~r allow~ air or liquid to be e~ected from the syringe but pr~vent~ return fluid channel ~luid ~low into the syringe. The lower plug memb~r al~o defines fluid flow passageway~ in the side wall~ and th~ under6ide thereof to IU~1/2540 4 203~Q~
PAT~NT
communicat:e the hypodermic needle carriad by the forward end of the oyringe with the ~rea between the two plug mombers.
Prior to drawing ~luid into the ~yringo throuqh the hypodermic needle theroon, the upper plug member i~ beld in the elevated po~ition by the annular flango therQon bearing against the chamber wall. In this po~ition, thc pi~ton di~posed within the syrings above the upper plug member can ba moved upwardly and downwardly to draw and expel air into and out o~ the syringe through the hypodermic needlo. As the pi~ton i8 moved downwardly within the ~yringe, air iB forced through the fluid flow channel in the upper plug member into the conical rece~s in the lower portion thereo~, about the lower plug member and i~ expellsd through tho hypod~rmic n~odl~. Upward movoment of the piston effect~ an oppo~ito pa~sage of air into the ~yringe.
Upon inserting the hypodermic needl~ into ~ v$al o~
liquid medicine and raising tho pi~ton within the ~yringe, the liquid i~ drawn upwardly into the ~yringe about the lower plug mombQr and through th~ uppor plug member into the ar~a within the ~yringe botw~on the piston ~nd the upper plug member. As the pi~ton 1~ puoh-d downwardly to ~-ot tb- m-dicino, ~h- hydraulic forco of th0 liquid acting again~t th~ uppor aur~aco o~ tho upper plug member causes the uppor plug m~mber to mov~ downwardly, whereupon tho annular flango thareon pa~se~ ovcr a radially ~xtending ~houlder ~ormed in tha chambor wall into an onlarqed diamotor portion of the chambor and flexQ~ outwardly.
Concurrently, the liquîd pa~ofi through tho channel in the upper plug mombor into tho roco~ in th~ undor~ido ther~o~, about tho lower plug me~bor and into and out o~ th~ hypodermic needl~. The force of the liquid flow pa~sing through the upper ~lug member and again~t the lower plug ~embor, m~intains tho lowor plug IWI/25~.0 5 2~3~01~
PATENT
~astl73 member in low~red po~ition within the chamb~r 60 that the conical oxtension thereon will not block the downward flow of any of ths liquid through tho uppor plug membor to the ne~dl~
Upon the upper plug member having been movod downwardly such that the annular flange thoroon pas~ into the ~nlargQd diamat~r portion of the chamb~r, ~ny 0ub~0quont r~traction of the pi~ton will not affect further a~piration of fluid into the ~yringo regardle~s of whoth~r or not all of th~ liguid has been in;ected through tho hypodermic needle Such retraction of the pi~ton will create a pressure drop in the ~yringo bolow tha pi~ton, causing the lowor plug member to ~ovo rearwardly against the underside o~ the upper plug member which i~ prsvented from moving rearwardly by th- abutment Or tho annular flange thoreon with the aforesaid ahouldor in tho chamber wall When the lower plug m~mber abut~ the upper plug momber the conical extension on tho lower plug m~ber will ooal the lowor ond of tho fluid flow channel extending through the uppor plug member, rendering tho ~yringe non-ro~illable and thuo non-rou~a~le ~ n ~ oocond ~bodim~nt of tho invontion, a ~inglo plug member la dispos~d in a lowor chambor of tho Dyringe wh~ch i8 axi~lly movoablo thoroin by th- hydr~ulic force~ acting thoreon during liquid ~oction from e raiaed inactiv~ position to a lower active po~ition Tho plug membor define~ a rosilient flange which projact~ outwardly from tho underside~ tharooS and cooporate~ w$th the intorior wall ~urSaco oS the chambor, first to r~tain the plug mamber in th~ ra~d inactive po~ition both prior to u~e and while ~ir i~ aspirat~d into and e~ected from the syringe B0 that th~ ~yringe can be used a~ an air pump, and ~econd, to rstain tho plug me~ber in the lower active posltion upon a volume of liquid having been aspirated into the syringe ~ o 6 203~
PA~NT
and the plug member driven to said activa position by the o~oction Or ~aid liquid. In the rai~od inactive position air i8 free to pass through the lower ~yringe chamber and about the plug member~ therein by mean~ of fluid flow pas~ageway~ rormed in the upper perimeter portion of the plug member and in the lower surface of the resilient flange. In the lower active po6ition, any withdrawal of th- pi~ton in an effort to draw sdditional liguid into the ~yring- will dr~w the plug ~ember rearwardly within the chamber cau~ing ~ ~ealing onqagement of the resilient flange with a ~houlder formed in the chamber wall, pr~venting further aspiration of fluid into the ~yringe and thereby rondering the devico non-reusable.
IN TH~ DRA~IN~B
~ i~uro ~ i~ a ~ectional viow of the hypodermic syring~
of the pre~ent inv-ntion a- fiuid i~ boing drawn therein.
~ igur~ a s0ctional view of the lower portion of tho hypodora~c ~yringo Or tho prosent invention ~howing the relative po~itioning of the plug membQrs as liquid i~ beinq ajected from th- ~yringe.
rigur- 3 i~ A partial ~ectional view of th~ lower portion of th~ hypodermic ~yringo o~ the prQsent lnvention during an attemptod refilling o~ tho yringo.
rl~ur~ a partial ~octional vi~w of lower portion of a modified form of th~ pr~ont invention.
r~ur- S is prospective view of tho lower plug members Or the pres-nt invention.
Jigur- ~ ia a view taken along lino 6-6 in Figure 5.
~JI/25~0 7 2~3~
l?Aq~l!:Nq!
~.89/173 r~ gur- 7 is ~ ~ectional view o~ a ~econd embodiment o~
the present invontion showing tho po~ition of the plug member prior to liquid beon drawn theroin.
~ iqur- 8 i~ a partial ~ectional ~iew of th~ lower portion o~ cond embodi~ent of th~ pro~ent invention showing the po~ition of tho plug membor ~ liquid i~ b~ing ~Qctod from the syringo.
Flgur- ~ is ~ parti~l ~octional view o~ th~ lowor portion o~ a ~econd embodiment of the prosent invention showing the position o~ the plug momber durinq an attemptad re~illing o~
the ~yringe.
~ igur- 10 i~ a porspoctivo view o~ tho plug member of the ~econd ombodi~ent o~ the invention.
D~BCRIPTION OY T~ PR~R~p ~MBQ~IM~N~a The non-rousablR hypodermic ~yringo 10 o~ th~ pr~sent invention includo~ ~ cylindrical barrel 12, a double-landod pi~ton 14 ~nd ~ plung~r rod 16 for u~o in r~ciprocating the piston 14 within barrol 12. Rod 16 d~fino~ a gripping flango 17 on tho re~rward nd thoraof and ia prorerably ~ecured to the pi~ton 14 ~t ~t~ forward ond by mo~n- of an ~nlarged tapa~ed portion 18 hold within ~ aorre~pondingly configured rocea~ 20 in the rearward portion of pi-ton 14. An upper plug momber 22 ia di~po~ed below pi~ton 1~ within ~ cha~bor 23 de~ined by the lower portion of b~rrel 12 and a barr-l cap 26. A lower plu~ memb~r 24 iR dispo~ed in chamber 23 axially below plug member 22. Barrel cap 26 i~ perman-ntly af~ixod to tho lower ond of barrel 12 by heat bonding on a ~uitable adhe~ivo, and a hypodermic noedle 28 i~ permanently secured within a hollow ~xtension 30 extending from barral cap 26.
~w/2s~0 8 ~3~
~AT~N~
The ~yringe barrel 12, which i~ preferably constructed of a transparent durable plastic material, defines an outwardly extending radial flange 32 at the upper end thereof, a constant diameter upper portion 34 within wh$ch piston 14 i8 axially translatable, a lower portion 36 wh~ch defin~s the interior wall of chambor 23 and an intermediary annular horizontal ond wall 38 A stop ring 39 i~ provided at thQ rearwardmost ond o~ barrel 12 to pravent withdrawal of tha pi~ton fro~ the barrel 80 a8 to preclude acces~ to the interior of the barrel.
The upper plug member 22, preferably constructed of a rubber material includes hn onlarged diameter upper portion 40, a body portion 42, a ~houldor 44 di~posed th~rebetween, a r~silient annular flange 46 extending outwardly from the lower end thereof, and a fluid channol 48 extending ~xially therethrough and communicating with a conical rece~s 50.
Shoulder 44 i~ adaptod to abut a fir~t shouldex 52 defined by the lower portion 36 of barrel 12 in chamber 23 to limit the downward movement of the upper plug member 22 within chamber 23. As ~n in Figure 1, th~ resilient annular flango 46 ~xtend~ outw~rdly and upwardly from the lowor end of plug member 22 ~uch that when the uppar plug member 22 i8 in the raised inactive position, fl4ng~ 46 flox~s outwardly and baars against ~id~ wall 54 in chamber 23 and ~buts a ~econd should~r 56 defined by the lower portion 36 o~ barr~l 12 in chamber 23 to limit the upward trav-l of plug member 22 within chamber 23. Th~ lower portion 36 o~ syringe barr~l 12 ~l~o d~fin~ a third interior ~houlder 58 in chamb~r 23 locat~d botw~en ~ide wall 54 and a lower ~id~ wall 59 di~po~sd about an ~nlarged diameter portion 60 of chamber 23 ad~ac~nt tha lower end 62 oi barral 12.
~ 2540 ~?
2~3~
PA~R~T
1~19/17 3 The lower plug member 24, also pre~rably constructed of a rubblsr material, io di~poscd axially b~low upper plug member 22 in cha~b~r 23. ~owor plug mombor 24 d~ine~ a lower base portion 64, and ~ conical extension 66. Lsw~r ba~e portion 64 define~ a diametor 1~8 than the inn~r diameter of ~nd cap 26 to allow fluid flow therebetween but graater than th~ inner diameter of barrel 12 at the ond 62 thereo~ ~o a~ to be axially translatable within chamb~r 23 b~twa~n the lower ~nd wall 63 of barrel cup 26 and the lower Qnd 62 o~ barral 12. Ext~nsion 66 proj~ct3 upwardly from ba~e portion 64 into the recess 50 in the upper plug mcmb~r 22, and i~ configur~d ~o as to abut and mate with tho conical ~ide wall of rece~ 50 upon ths plug member~
being forced togothQr ~o a~ to ~oal the lower end of fluid channol 48 in th- uppor plug m-mbQr 22 to prevent fluid flow therothrough. A~ ~eon in Figure 5 and 6, fluid passages 68 are formed in tho side and bottom wall~ o~ tho lower plu~ msmber 24 ~o ~8 to communicat~ the hypodermic n~odl~ 28 with tho portion of chamber 23 abova th~ lowor plug memb~r 24 ~o a~ to allow fluid flow therob~twoQn a~out lowor plug m-mbQr 24 wh~n th~ lower plug member i8 in it~ low~rmo~t po~ition against ond wall 63 of barrel cap 26.
Pr~o~ to any ~luid bcin~ ~r~wn into th~ ~yrlnge 10 through neodl~ ~8, th~ upper plug ~ombar i~ in tho rai~ed position in ohambor 23 as illu~t~tad in Figur~ 1. In thi~
po~ition, tho ~yring~ lO can bo us~d as an air pump by mean~ of pi~ton 14, as the downwar~ movemQnt of pi~ton 14 will force air in barrel 12 through chambor 23 via the channel 48 in the upper plug member 22, about tho lowor plug member 24 and out ne~dle 28, but will not creat~ ~uf~icient forc- again~t the upper ~nd o~
plug member 22 to ~ov~ the plug ~ember downwardly within chamber II,W/25~0 10 - ` 2~3~
PA~M~
1~9/173 23. Accordingly, i~ one n~eded an in~ction o~, for example, 20 units of medicine, the u~er would retract the piston to a point slightly above the 20 unit mark on tho barrel (not shown), insert the needle into the liquid medicine in the vial through the standard ~eal thereon, push tho pi-ton back down to wall 38 to drive a volume of air ~lightly in OXCR~9 of 20 unit~ into the vial and retract the p$ston to tho point slightly above the 20 unit mark to draw lightly ov~r 20 units of medicino into th~
barrel of the ~yringe. Tho ~yringe i~ then h~ld in an invertod position with the neodle pointing upwardly, and tho pieton i~
again pushed back to th~ 20 unit mar~, ejecting the excess medicine from the n~edle a~ well a~ any air remaining in tho syringe. The syringe i~ then ready to in;ect the measured 20 unit~ of medicino into the u~r ~nd, duo to the air pumping capability of tho ~yringe, th~ intorior of the vial of medicin~
ft at atmospheric pres~ure.
AA the piston 14 i8 then driven downwardly during the in~oction, tho liquid medicine i~ forc~d through the channel 48 in th~ upp-r plug m~ber 22, about the low~r plug momber 24 through th~ fluid pa~ag~ 68 th~roin and into and out of the hypodermic ne~dl~ 28. Concurr~ntly, the hydraulic forces created during the in~ction by th~ liquid b~ing driven by the piston ~ct on th~ ffectivo uppsr surf~c~ area~ of tho uppor ~nd lower plug member~ 22 and 24 to drivo the upper plug member 22 downwardly within cha~ber 23 to tha position illustrated in Figure 2 and the lower plug member 24 downwardly ~gain~t the lower end wall 63 of cap member 26. A~ ~h~ re~iliont flanqo 46 on the upper plug member 22 pas~Q~ the ~houlder 58 in chambor 23, the flange flexe~
outwardly within the enlarg0d diameter portion 60 o~ chamber 23 and bear~ again8t the ~id~ wall 59 o~ th~ ~nlarged diam~ter wo 11 2~3~0~ 5 PAT~NT
portion 60 o~ chamber 23 ~he upp0r and lower plug mRmbers will thon r~main in thi~ po~ition during the injection If, either after the completion oS the in~ection or during the injection, one were to att~mpt to retract tho pi~ton 14 within the barrel to a~pirate mor~ liquid into the ~yr$ng~ through needlo 28, the re~ultant vacuum created within th- b~rrel below the piston 14 would draw the upper and low~r plug m~mber~ upwardly to tho positions illustrated in Figure 3 The upward travel o~ upper plug member 22 durin~ ~uch ~n attompted rqfill would be limitod by tho abutment oS the flang~ 46 theroon with ~houlder 58 in chamb~r 23, while the conical exten~ion 66 on tho lower plug member 24 would be drawn into rece~ 50 and against the upper plug member, ~ealing tho lower end of channel 48, and thereby prev~nting any fluid Slow upwardly through the upper plug member 22 The ~ealing engagement o~ flange 46 with the side wall 59 and ~houlder 58 i~ chamber 23 would prev~nt any upward fluid flow about the upper plug membor 22 Accordingly, prior to drawing any liquid into the ~yr$nge 10, the pi~ton can be moved upwardly and downw~rdly within the barrol without eSfocting deactivation of the ~yringe Howevor, once a liquid haa b~on drawn into the ~yring~ and th- pi-ton movod downwardly a ~light di~tanc~
~u~ficiont to cau~ ~ trnn~lation of th~ lower plug mombar 22 a di~tanco ogu~l to axial l~ngth of ~ido wall 54, ~lango 46 cl~ar~
~houlder 58, ~l~xe~ outwardly and the syringe i~ render~d inoperativo, other than to e~oct the ~luid contain~d thor~in without any a~firmstive ~ction or other cooperation of th~ ussr Whilo th~ above mechanism provides a non-reusable ~yringe which cannot be r~filled by the u~er, to dissuade one from continuing to try to make the devic~ function properly or from even attempting to di~as~emble the uyringe to remove the ~UII/2540 12 2~3~
PAT~NT
~89~73 di~abling plug membor~, tho enlarg~d tap~red end 18 o~ thQ
plungor rod 16 by whi¢h the rod i~ ~ecurad to piston 14 is configured to 6eparate from the pi~ton in the evont one were to attompt to draw additional ~luid into tho ~yringe. Once the upper plug member has been driven forwardly to tho lower position by in~ection of liquid from the ~yringe, any ~ub~oquent r~trac-tion Or the piston within the barrel will crsatQ a vacuu~ within the barrel betwoon the piston and upper plug member as a regult of the ~aaling ongagemont~ of ths upper and lower plug member~ 22 and 24. A~ thi~ vacuum increases with the retraction of the piston, the oppo~od forco~ acting on th~ upper and lower end~ of the pi~ton will cau~e the onlarged tapered end 18 of the plunger rod 16 to be pulled out of th~ tapered rece~ed 20 in tho pi~ton, ~oparating th- rod 18 from piston 14 and making the d~truction o~ the syrinqo readily apparont to ths us~r ~o as to dis~uade the user from any further attempt~ to u~e the davice or to try to disa~semble and rocon~truct tho ~yringe. In addition, a washer 80 could be providod on barr~l wall 38 which oxtend~ slightly over tho up~er perimotor ~urface of upper plug member 22 to provant ono from b~ing ablo to ~omehow pull tho plug members from ~ho barr~l. Alternati~oly, ond wall 38 could bo ~xtonded radially inw~rdly to provido tho ~amo function.
Figuro 4 lllu~trates a modifi~d form of th~ abov described embodiment o~ the invention which, whilo operating ~n the sam~ ~annor a~ ths prior ~bodimont, di~fer~ ~lightly from the prior embodimont in the configur~tion of th~ upper plug member 122 and tho lower portion 136 of thG ~yringe barrel 112.
In the ~econd ambodiment, th~ upper plug member 122 which, like the upper plug member 22 of the prior ombodiment, i8 preferably con~tructed o~ a re~ilient rubber material, comprises an enlarged W~/~KO 13 203~013 ~AT~NT
1~9~173 diameter upper radial flango portion 140, a central body portion 142 of reducod diameter, an enlarged lower radial flange portion 146, a central axial ~luid channel 148, and conical recess 150.
~he enlarged low~r flange portion 1~6 i8 sizod ~e a~ to bs in sl~ght compre~sion against a ~ido wall 154 d~fined by bar~el 112 to rotain plug membor 122 in place prior to e~ection o~ liquid th~rethrough and ~uch that upon plug member 122 being forced downwardly by the hydraulic forc~s acting theraon during liquid e~ection, the enlarged lower flange portion 146 will flex outwardly upon clearing a ohoulder 158 definod in the lower portion of the barrel to maintain the plug member 122 in a lowered po~ition and, in combination with a lower ylug number 24, dis~bl~ the syringo from being ~ble to draw additional liquid therein in the 6ame manner as described above with respect to the prior embodim~nt.
In addition, the ~yringe barrel can be modified a~ ~een in Figur~ 4 to provide an inwardly extanding radial flang~ 138 having an upp~r curvalinear surfac~ 139. Flango 138 prevent~
withdrawal of th~ plu~ member~ from the barrol, while tho upper curv~lin~ar urf~ce 139 theroon will ~ t th~ user in allgning any ~ix bubble~ in the ~odicino with the fluid flow channel 148 in the uppor plug momb~r 122 $or ro~oval through needle 28. ~he configur~tion of flang~ 138 can ba u~ed with ~ithor ombodiment of t~ invantion. How~v~r, when u~ing ~lange 138, tha low~r ~urf~ce of th~ piston ~hould bo corresponding configured a~ seen at 114 in Figure 4.
Figur~ 7-10 illu~tr~t- a ~econd ombodiment of the invention which employs only a ~ingle plug member to render the syringe non-r0usabl~. The syringe 200 of the ~econd embodiment differ~ from syringe 10 801ey in the lower portion thereof and ~w/~o 14 203~
~.~19/~,73 accordingly only the lowor portion of ~yring~ 200 will be described. Syringe 200 include~ a barrel 202 de$ining a constant diameter portion 204 within which ~ ~iston 206 i8 di~posed.
Pi~ton 206 i8 preferably provided with a curvalinear lower ~urfaco 208 and i~ carri~d by plunger rod 210. Barrel 202 d~inas a lower ~yringo chamber 211, an annular shoulder 212 dispoQed in chamber 211 and a curvallnear lower surface 214 having a concavo position 216 t~rminating a flat horizontal surface 218 having a c~ntral opening 220 therein. A barre} cap 222 is carried by the lower end of barral 202 and a hypodermic needle 223 i~ carri~d by barrel cap 222 ~uch that it communicat~s with chamber 211 through the op~ning 220 in barrel cap 222.
An annular ~top member 224, preferably constructed of the ~ame durable plastic matorial a~ barrel 202, i~ affixed to th~ interior ~urfac- of barr~l 202 ~o a~ to dafine the upper end of chamber 211. Stop m-mb~r 224 defines a curYalinear upper surface 226 adapted to mate with the correspondingly configured lower ~urfac- 208 of pi~ton 206, a c~ntral opening 22~ therain, a flat horizontal lower ~urfaco 230 and an annular dependinq portion 232 which abuts ~hould~r 212 in chamber 211.
A plug memb~r, prererably 234 con~tructed Or a rubber material, i~ di~po~ed within chamb~r 211, and defines: an upper portion 236, a curv~d downwardly tapered portion 238 which i~
dispo~ed bQlow portion 236 and inwardly ~pacod from the perimeter thereo~, and a r~ nt low~r annular flangs 240 di6po~ed below tapered portion 238. The out~r diameter Or tho upp~r portion 236 oP plug member 234 iD le~8 than the inner diameter derin~d by the interior ~ide w~ll 242 of ~top member 224 ~o a~ to allow ~luid flow therebetw~an. For rea~on~ which will become ~sadily apparent, the diameter of low~r flange 240 in the unflQxed ~tate, ~WI/25f.0 15 ~3~
PATEN~
as ~osn in FigurR 9, i~ greatQr than the inner diam~ter def in~d by intorior ~id~ w~ll 242. Aa ~o~n in Figur~ 9, ~luid passageways 244 and 246 are provided in tho upper surfac- of plug member 234 ~nd in the underside of resilient flange 240 re~pectively to allow for fluid flow about the plug momber.
Alternatively, the fluid passageway~ could be formed in the lower ~urfac- 230 and doponding portion 232 o~ ~top m~mber 224 and in the lower ~urfac~ 214 of barr~l 202 to allow for ~uch flow.
In th~ rais~d inactiv~ poaition illu~trated in Figure 7, flange 240 i~ dispo~d ~ub~tantially adjacent the tapered portion 238 of the plug membor 234, fl0xa6 outwardly and bears against the ~ido wall 242 o ~ to r~tain thQ plug member 234 in th~ r~i~ed inactivo po~ition. Prior to any liquid boing drawn into tho ~yringo 200, tho ~yringe can be used as an air pump, as w~th the prior ombodiment, as ~ir i~ frqe to pa~s through chamb~r 211 about plug m~mber 234 via ~luid pa~sageways 244 ~nd 246 without moving the plug m~mb~r. Upon ~ liguid boing drawn into th~ syringQ and th~ piston 206 being movQd downwardly, the liguid i~ forcsd through chambor 211, about plug membar 234 through the fluid pafisageways 244 and 246 ther~in ~nd out needle 224.
Concurrently, th~ hydrauli¢ for¢o~ acting on plug member 234, forcQ the plug momber downwardly within chamb~r 211, caus$ng flange 240 to movo past tho lowor ond 248 of top mqmber 224 ~nd again~t th- lowor surface 214 o~ tho barr~l 202 to the position illustrated in Figur- 8. A~ ~oon a~ rlang~ 240 clear~ ond 248, it flexes outwardly in the ~nlargod diameter portion 241 of cham~er 211 and the plug ~mber 234 i~ in the activo po~ition.
Ther~aftor, withdraw~l of tho pi~ton 206 in ~n offort to draw moro liguid into th- syringo will ca w e the plug member to be drawn roarwardly within chamber 211 ~uch that the upper surfacQ
~1/25~0 1 6 2~3~
PAT~N~
~89/173 249 of flange 240 will abut the low~r end 248 of ~top member 224 and prevent fluid pa~age ther~betwo~n as ~een in Figure 9, thereby rendering the syringe non-reu~able.
The ~Qnsitivity of th~ ombodiments of the non-reusable syringe of the presont invention i~ determined by th~ axial di~tance the flange 46 on the fir~t mbodiment, tho onlarged flange portion 146 on the modified form thoreof, or the flange 240 on the ~econd embodiment, travel~ before flexing outwardly to ~ecuro the plug member in its lower active position. For example, in the second embodiment this d$~tance d~pends on the axial length of the depending portion 232 of stop member 224. By incr6asing this axial length, or the length of ~ide wall 54 in tho first embodimont, the syringe could be dosigned to allow for ojection of ~ small amount of liguid prior to the plug member being locked in its lower active po~ition. This would provide the usor with ~oms flexibility in the ~vent of inadvertly ejecting ~lightly too much liguid during air expulsion prior to an injection a~ the user could then draw a portion of an additional unit of medicine into the ~yringe to correct the orror.
Variou~ othor ch~nges and modifications may be made in carrying out th~ prasont invention without departing from the ~pirit and ccopo th~r~of. Insofar a~ the~o ch~ngo~ and modifica-tionc arQ within the purv$ew of th~ appendod claims, they are to bo considered a~ part of the present invention.
w~/2~0 17
Claims (26)
We claim
1 A single use disposal hypodermic syringe comprising a hollow elongated barrel portion;
a piston in sealing engagement with and axially translatable along said barrel portion;
a piston rod secured to said piston and projecting from one end of said barrel for use in reciprocating said piston;
a walled chamber disposed proximate the other end of said barrel portion; and means disposed in said chamber for allowing air to pass forwardly and rearwardly thereby in response to translation of said piston within said barrel portion and, upon liquid being drawn into said barrel portion through said chamber and at least a portion thereof ejected from said syringe, for preventing any additional liquid from being aspirated into said barrel portion through said chamber thereby rendering said syringe non-reusable
a piston in sealing engagement with and axially translatable along said barrel portion;
a piston rod secured to said piston and projecting from one end of said barrel for use in reciprocating said piston;
a walled chamber disposed proximate the other end of said barrel portion; and means disposed in said chamber for allowing air to pass forwardly and rearwardly thereby in response to translation of said piston within said barrel portion and, upon liquid being drawn into said barrel portion through said chamber and at least a portion thereof ejected from said syringe, for preventing any additional liquid from being aspirated into said barrel portion through said chamber thereby rendering said syringe non-reusable
2 The syringe or Claim 1 wherein said means, comprises a plug member moveable within said chamber from a rearward position to a forward position in response to liquid being forced against said plug member by said piston, and fluid flow means disposed between said plug member and the wall of said chamber for allowing fluid flow about said plug member through said chamber, said plug member defining a resilient annular flange cooporating with the wall of said chamber first to maintain said plug member in rearward position upon air being passed through said fluid flow means in response to translation PATENT
of said piston within said barrel portion, second to maintain said plug memeber in Said forward position upon said plug member being moved to said forward position by said liquid during ejection thereof from said barrel portion, and third for sealing said fluid flow means upon said plug member being forced to said forward position and said piston being retracted within said barrel portion toward aid one end thereof to prevent any additional liquid from being aspirated into said barrel portion.
of said piston within said barrel portion, second to maintain said plug memeber in Said forward position upon said plug member being moved to said forward position by said liquid during ejection thereof from said barrel portion, and third for sealing said fluid flow means upon said plug member being forced to said forward position and said piston being retracted within said barrel portion toward aid one end thereof to prevent any additional liquid from being aspirated into said barrel portion.
3. A single use disposable hypodermic syringe comprising:
a hollow elongated barrel portion;
a piston in sealing engagement with and axially translated along said barrel portion;
a piston rod secured to said piston and projecting from one and of said barrel portion for use in reciprocating said piston;
a walled chamber disposed proximate the other end of said barrel portion;
plug means disposed in said chamber and moveable therein from a rearward position to a forward position in.
response to liquid being forced against said plug means by said piston;
fluid flow means disposed between said plug means and the wall of said chamber for allowing fluid flow about said plug moans;
means for maintaining said plug means in said rearward position upon air being passed through said fluid flow means in response to translation of said piston within said barrel portion and for permanently maintaining said plug means in PATENT
said forward position upon said plug means being moved to said forward position by said liquid during ejection thereof from said syringe; and means for sealing said fluid flow means upon said plug means being forced to said forward position and said piston being retracted within said barrel portion toward said one and thereof to prevent any additional liquid from being aspirated into said barrel portion about said plug member thereby rendering said syringe non-reusable.
a hollow elongated barrel portion;
a piston in sealing engagement with and axially translated along said barrel portion;
a piston rod secured to said piston and projecting from one and of said barrel portion for use in reciprocating said piston;
a walled chamber disposed proximate the other end of said barrel portion;
plug means disposed in said chamber and moveable therein from a rearward position to a forward position in.
response to liquid being forced against said plug means by said piston;
fluid flow means disposed between said plug means and the wall of said chamber for allowing fluid flow about said plug moans;
means for maintaining said plug means in said rearward position upon air being passed through said fluid flow means in response to translation of said piston within said barrel portion and for permanently maintaining said plug means in PATENT
said forward position upon said plug means being moved to said forward position by said liquid during ejection thereof from said syringe; and means for sealing said fluid flow means upon said plug means being forced to said forward position and said piston being retracted within said barrel portion toward said one and thereof to prevent any additional liquid from being aspirated into said barrel portion about said plug member thereby rendering said syringe non-reusable.
4. The syringe of Claim 3 wherein said plug means comprises a plug member and said maintaining means comprises an annular resilient flange projecting from said plug member against a portion of the wall of said chamber and a radial shoulder defined by said wall such that upon said plug member being forced from said rearward position to said forward position, said flange passes forwardly of said shoulder and flexes radially outwardly and, upon said piston being subsequently retracted within said barrel portion, abuts said shoulder and forms a sealing engagement therewith to maintain said plug member in said forward position and prevents rearward fluid flow thereby.
5. The syringe of Claim 4 including a stop member disposed in a said barrel portion between said piston and said plug member, said stop member including an inwardly directed radial portion for limiting the rearward movement of said plug member in said chamber and an annular depending portion defining said portion of the wall of said chamber and said shoulder.
PATENT
PATENT
6. They syringe of Claims 4 or 5 wherein said plug member defines an upper cylindrical portion, a tapered portion terminating at its lower end in said resilient flange, said tapered portion being disposed below said upper portion and being inwardly spaced therefrom so as to define an area extending about the perimeter of the underside of said upper cylindrical portion for receiving a portion of said resilient flange upon said plug member being disposed in said rearward position.
7. The syringe of Claims 4 or 5 wherein said fluid flow means include a plurality of passageways formed in an upper portion of said plug member and a plurality of passageways formed in a lower portion of said resilient flange.
8. The syringe of claims 4 or 5 wherein said fluid flow means include a plurality of passageways formed in the wall of said chamber adjacent said plug member.
9. The single use syringe of Claim 3 wherein said plug means comprises a first plug member and a second plug member disposed forwardly of said first plug member, said first plug member being moveable from said rearward position to said forward position and wherein, said maintaining means is defined by said first plug member, and sealing means is defined by said second plug member.
10. A single use disposable hypodermic syringe comprising hollow elongated barrel portion;
PATENT
a piston in sealing engagement with and axially translatable along said barrel portion;
a piston rod secured to said piston and projecting from one end of said barrel portion for use in reciprocating said piston;
a walled chamber disposed proximate the other end of said barrel portion, said chamber having a first wall portion extending about a rearward portion thereof, a second wall portion extending about a forward portion thereof and defining an enlarged diameter portion of said chamber, and a radial shoulder disposed therein between said first wall portion and said second wall portion; and a plug member disposed in said chamber and movable therein from a rearward position to a forward position in response to liquid being forced against said plug member by said piston, said plug member defining a rearward portion, a forward portion, an annular resilient flange extending from said forward portion, said resilient flange having a diameter greater than the inner diameter of said first wall portion of said chamber and less than the inner diameter of said second wall portion of said chamber; and fluid flow means in said chamber disposed about said rearward portion of said plug member and about a forward portion of said annular resilient flange for allowing fluid flow about said plug member, whereby said resilient flange boars against said first wall portion of said chamber when said plug member is in said rearward position, thereby maintaining said plug member in said rearward position upon air being passed through said fluid flow means in response to translation of said piston within said barrel portion, permanently retaining said PATENT
plug member in said forward position upon said plug member being moved to said forward position by said liquid during election thereof from said syringe, and sealing said fluid flow means upon said plug member being forced to said forward position and said piston being retracted within said barrel portion toward said one end thereof to prevent any additional liquid from being aspirated into said barrel portion about said plug member thereby rendering said syringe non-reusable.
PATENT
a piston in sealing engagement with and axially translatable along said barrel portion;
a piston rod secured to said piston and projecting from one end of said barrel portion for use in reciprocating said piston;
a walled chamber disposed proximate the other end of said barrel portion, said chamber having a first wall portion extending about a rearward portion thereof, a second wall portion extending about a forward portion thereof and defining an enlarged diameter portion of said chamber, and a radial shoulder disposed therein between said first wall portion and said second wall portion; and a plug member disposed in said chamber and movable therein from a rearward position to a forward position in response to liquid being forced against said plug member by said piston, said plug member defining a rearward portion, a forward portion, an annular resilient flange extending from said forward portion, said resilient flange having a diameter greater than the inner diameter of said first wall portion of said chamber and less than the inner diameter of said second wall portion of said chamber; and fluid flow means in said chamber disposed about said rearward portion of said plug member and about a forward portion of said annular resilient flange for allowing fluid flow about said plug member, whereby said resilient flange boars against said first wall portion of said chamber when said plug member is in said rearward position, thereby maintaining said plug member in said rearward position upon air being passed through said fluid flow means in response to translation of said piston within said barrel portion, permanently retaining said PATENT
plug member in said forward position upon said plug member being moved to said forward position by said liquid during election thereof from said syringe, and sealing said fluid flow means upon said plug member being forced to said forward position and said piston being retracted within said barrel portion toward said one end thereof to prevent any additional liquid from being aspirated into said barrel portion about said plug member thereby rendering said syringe non-reusable.
11 A single use disposable hypodermic syringe comprising:
a hollow elongated constant diameter barrel portion;
a piston in sealing engagement with and axially translatable along said barrel portion;
a piston rod secured to said piston and projecting from one end of said barrel portion for use in reciprocating said position;
a walled chamber disposed proximate the other end of said barrel portion;
a first plug member disposed in said chamber and defining means therein to allow fluid flow therethrough, said plug member being moveable from a rearward position to a forward position in response to liquid being forced against said plug member by said piston;
a second plug member disposed in said chamber forwardly of said first plug member and defining means for allowing liquid flow about said second plug member for ejection from said syringe and means for sealing said fluid flow means in said first plug member upon said second plug member being forced PATENT
against said first plug member when said first member is in said forward position; and means for maintaining said first plug member in said rearward position upon air being passed therethrough in response to translation of said piston within said barrel portion and for permanently maintaining said plug member in said forward position upon said first plug member being moved to said forward position by said liquid during ejection thereof from said syringe such that upon said first plug member being forcad to said forward position and said piston being rotracted within said barrel portion toward said one end thereof, said second plug member is caused to be drawn rearwardly within said chamber against said first plug member, sealing said fluid flow means therein and preventing any additional liquid from being aspirated into said barrel through said first plug member thereby rendering said syringe non-reusable.
a hollow elongated constant diameter barrel portion;
a piston in sealing engagement with and axially translatable along said barrel portion;
a piston rod secured to said piston and projecting from one end of said barrel portion for use in reciprocating said position;
a walled chamber disposed proximate the other end of said barrel portion;
a first plug member disposed in said chamber and defining means therein to allow fluid flow therethrough, said plug member being moveable from a rearward position to a forward position in response to liquid being forced against said plug member by said piston;
a second plug member disposed in said chamber forwardly of said first plug member and defining means for allowing liquid flow about said second plug member for ejection from said syringe and means for sealing said fluid flow means in said first plug member upon said second plug member being forced PATENT
against said first plug member when said first member is in said forward position; and means for maintaining said first plug member in said rearward position upon air being passed therethrough in response to translation of said piston within said barrel portion and for permanently maintaining said plug member in said forward position upon said first plug member being moved to said forward position by said liquid during ejection thereof from said syringe such that upon said first plug member being forcad to said forward position and said piston being rotracted within said barrel portion toward said one end thereof, said second plug member is caused to be drawn rearwardly within said chamber against said first plug member, sealing said fluid flow means therein and preventing any additional liquid from being aspirated into said barrel through said first plug member thereby rendering said syringe non-reusable.
12. The syringe of Claim 11 wherein said maintaining means comprises an annular resilient flange projecting from said first plug member against a portion of the wall of said chamber and a radial shoulder defined by said wall such that upon said first plug member being forced from said rearward position to said forward position, said flange passes forwardly of said shoulder and flexes radially outwardly therefrom, and upon said piston being subsequently retracted within said barrel portion, abuts said shoulder to maintain said first plug member in said forward position.
13. The syringe of Claim 12 wherein said fluid flow means in said first plug member comprises a fluid flow channel PATENT
extending axially therein and communicating with a conical recess formed in said first plug member and wherein said sealing means on said second plug member comprises a conical extension thereon adapted to be received within said recess in said first plug member and seal said fluid flow channel therein.
extending axially therein and communicating with a conical recess formed in said first plug member and wherein said sealing means on said second plug member comprises a conical extension thereon adapted to be received within said recess in said first plug member and seal said fluid flow channel therein.
14 The syringe of Claim 11, 12 or 13 including a cap member disposed about the forward end of said walled chamber, said cap member defining a central openinq in the forward end thereof and wherein said second plug member is axially moveable within said chamber between the forward end of said cap member and the forward end of said chamber wall.
The syringe of Claim 14 wherein said piston rod defines an enlarged portion at the forward end thereof, said portion being received and held within a correspondingly configured recess in said piston such that upon said first plug member being disposed in the forward position and said piston being retracted within said barrel portion, 4 vacuum is created between said piston and said first plug member causing said enlarged portion or said piston rod to be pulled from said recess, rendering said piston rod incapable of further reciprocation of said piston
16 A single use disposable hypodermic syringe comprising:
a hollow elongated barrel having a forward end and a rearward end;
a piston in sealing engagement with and axially translatable along a portion of said barrel;
PATENT
a piston rod secured to said piston and projecting from the rearward end of said barrel for use in reciprocating said piston;
. a first plug member disposed in said barrel forwardly of said piston and defining a fluid flow channel extending axially therethrough;
a second plug member disposed in said barrel forwardly of said first plug member and defining one or more channels therein for the passage of fluid about said second plug member and means thereon for sealing said fluid flow channel in said first plug member upon said plug members being disposed in an abutting relationship to prevent fluid flow through said channel; and means for maintaining said first plug member within a first portion of said barrel spaced from said second plug member to allow air to pass through said channel in said first member and about said second plug member in response to reciprocation of said piston within said barrel and, upon liquid being aspirated into said barrel through said channels in said plug members and said first plug member being forced rearwardly within said barrel to a second portion thereof during ejection of liquid from said barrel by the force or the liquid acting on said first plug member, maintaining said first plug member in said second position such that upon said piston being retracted toward said rearward end of said barrel, said second plug member is caused to be drawn rearwardly against said first plug member sealing said fluid flow channel in said first plug and preventing any additional fluid from being aspirated into said barrel through said first plug member thereby rendering said syringe non-reusable.
PATENT
a hollow elongated barrel having a forward end and a rearward end;
a piston in sealing engagement with and axially translatable along a portion of said barrel;
PATENT
a piston rod secured to said piston and projecting from the rearward end of said barrel for use in reciprocating said piston;
. a first plug member disposed in said barrel forwardly of said piston and defining a fluid flow channel extending axially therethrough;
a second plug member disposed in said barrel forwardly of said first plug member and defining one or more channels therein for the passage of fluid about said second plug member and means thereon for sealing said fluid flow channel in said first plug member upon said plug members being disposed in an abutting relationship to prevent fluid flow through said channel; and means for maintaining said first plug member within a first portion of said barrel spaced from said second plug member to allow air to pass through said channel in said first member and about said second plug member in response to reciprocation of said piston within said barrel and, upon liquid being aspirated into said barrel through said channels in said plug members and said first plug member being forced rearwardly within said barrel to a second portion thereof during ejection of liquid from said barrel by the force or the liquid acting on said first plug member, maintaining said first plug member in said second position such that upon said piston being retracted toward said rearward end of said barrel, said second plug member is caused to be drawn rearwardly against said first plug member sealing said fluid flow channel in said first plug and preventing any additional fluid from being aspirated into said barrel through said first plug member thereby rendering said syringe non-reusable.
PATENT
17. The syringe of Claim 16 wherein said maintaining means comprises an annular resilient flanga formed with and projecting outwardly from said first plug member and bearing against a first portion of said barrel when said first plug member in disposed in said first position to maintain said plug member in said first position prior to the ejection of liquid from said barrel, and a stop member in said barrel disposed forwardly of and radially outwardly from said first portion of said barrel such that upon said first plug member being forced to said second position by said liquid during ejection thereof, said flange passes forwardly of said stop member, flexes outwardly and bears against a second portion of said barrel disposed below said stop member whereby said first plug member is permanently held in said second position by the abutment of said flange with said stop member.
18. The syringe of Claims 16 or 17 wherein said first plug member includes a conical chamber formed therein and communicating with said fluid flow channel and wherein said sealing means defined by said second plug member comprises a conical extension thereon adapted to be received within said chamber in said first plug member and seal said fluid flow channel therein.
19. The syringe of Claim 18 including a cap member disposed about the forward end of said barrel and defining a central opening in the forward end thereof, said second plug member being axially moveable between the forward end of said cap member and the forward end of said barrel.
PATENT
PATENT
20. The syringe of Claims 16 or 17 wherein said piston rod defines an enlarged portion at the forward end thereof, said portion being received and held within a correspondingly configured recess in said piston such that upon said first plug member being disposed in said forward position and said piston being retracted in said barrel, a vacuum is created between said piston and said first plug member causing said enlarged portion of said piston rod to be pulled from said recess, rendering said piston rod incapable of further reciprocation of said piston.
21. A single use hypodermic syringe comprising:
a hollow elongated barrel having a forward end, rearward end, and a constant diameter portion adjacent said rearward and;
a piston in sealing engagement with and axially translatable along said constant diameter portion of said barrel;
a piston rod secured to said piston and projecting from said rearward end of said barrel for use in reciprocating said piston:
a first plug member disposed in said barrel forwardly of said piston and defining a fluid flow channel extending axially therethrough and means cooperating with said barrel for retaining said plug member within a first portion of said barrel as air is aspirated into and ejected from said barrel in response to translation of said piston within said barrel, and for retaining said plug member within a second portion of said barrel upon liquid having been aspirated into said barrel and ejected therefrom through said channel; and PATENT
a second plug member spaced from said first plug member, said second plug member having flow passages therein for the passage of fluid about said second plug member and means thereon for sealing said channel in said first plug member upon said first plug member being disposed within said second portion of said barrel and said piston being retracted toward said rearward end thereof whereby liquid is prevented from being further aspirated into said barrel through said first plug member, rendering said syringe non-reusable.
a hollow elongated barrel having a forward end, rearward end, and a constant diameter portion adjacent said rearward and;
a piston in sealing engagement with and axially translatable along said constant diameter portion of said barrel;
a piston rod secured to said piston and projecting from said rearward end of said barrel for use in reciprocating said piston:
a first plug member disposed in said barrel forwardly of said piston and defining a fluid flow channel extending axially therethrough and means cooperating with said barrel for retaining said plug member within a first portion of said barrel as air is aspirated into and ejected from said barrel in response to translation of said piston within said barrel, and for retaining said plug member within a second portion of said barrel upon liquid having been aspirated into said barrel and ejected therefrom through said channel; and PATENT
a second plug member spaced from said first plug member, said second plug member having flow passages therein for the passage of fluid about said second plug member and means thereon for sealing said channel in said first plug member upon said first plug member being disposed within said second portion of said barrel and said piston being retracted toward said rearward end thereof whereby liquid is prevented from being further aspirated into said barrel through said first plug member, rendering said syringe non-reusable.
22. The syringe of Claim 21 wherein said piston rod defines an enlarged portion at the forward end thereof, said portion being received and held within a correspondingly configured recess in said piston such that upon said first plug member being disposed in said second portion of said barrel and said piston being retracted within said barrel, a vacuum is created between said piston and said first plug member causing said enlarged portion of said piston rod to be pulled from said recess, rendering said piston rod incapable of further reciprocation of said piston.
23. The syringe of Claims 21 or 22 wherein said barrel defines a first stop member and a second stop member, said second stop member being disposed forwardly of and spaced radially outwardly from said first stop member and wherein said cooperating means comprises an annular resilient flange formed with and projecting outwardly from said first plug member and bearing against a portion of said barrel below said first stop member when said first plug member is disposed in said first portion of said barrel thereby restricting the rearward movement PATENT
of said first plug member in said barrel and maintaining said first plug member in place as air i aspirated into and ejected from said barrel and, upon said first plug member being forced to said second portion by said liquid during ejection thereof, said flange passes forwardly of said second stop member, flexes outwardly and bears against a portion of the barrel disposed below said second stop member whereby said first plug member is permanently hold within said second portion of said barrel by the abutment of said flange with said second stop member
of said first plug member in said barrel and maintaining said first plug member in place as air i aspirated into and ejected from said barrel and, upon said first plug member being forced to said second portion by said liquid during ejection thereof, said flange passes forwardly of said second stop member, flexes outwardly and bears against a portion of the barrel disposed below said second stop member whereby said first plug member is permanently hold within said second portion of said barrel by the abutment of said flange with said second stop member
24 A single use disposable hypodermic syringe comprising a hollow elongated barrel having a forward end, a rearward end and a constant diameter portion adjacent said rearward end;
a piston in sealing engagement with and axially translatable along said constant diameter portion of said barrel;
a piston rod secured to said piston and projecting from said rearward end of said barrel for use in reciprocating said piston;
a cap member secured to and disposed about said forward end of said barrel and defining a central opening therein;
a cannula means carried by said cap member and communicating with said central opening;
a first plug member disposed in said barrel forwardly of said piston and defining a fluid flow channel extending axially therethrough a first stop means adapted to abut a first shoulder defined by said barrel to limit the forward movement of said plug member within said barrel, and an annular PATENT
resilient flange member in sealing engagement with said barrel to prevent fluid flow therebetween and retain said plug member within a first portion of said barrel and air is aspirated into and out of said barrel through said cannula means and, upon said plug member being forced forwardly of said first portion of said barrel during the ejection of liquid from said barrel by the force of the liquid acting on said plug member, to cooperate with a second shoulder defined by said barrel to retain said plug member within a second forward portion of said barrel; and a second plug member disposed forwardly of said first plug member and defining means thereon for sealing said fluid channel in said first plug member upon said first plug member being disposed in said second forward portion of said barrel and said piston being retracted toward said rearward end of said barrel, whereby any additional liquid is prevented from being aspirated into said barrel through said now channel in said first plug member thereby rendering said syringe non-reusable.
a piston in sealing engagement with and axially translatable along said constant diameter portion of said barrel;
a piston rod secured to said piston and projecting from said rearward end of said barrel for use in reciprocating said piston;
a cap member secured to and disposed about said forward end of said barrel and defining a central opening therein;
a cannula means carried by said cap member and communicating with said central opening;
a first plug member disposed in said barrel forwardly of said piston and defining a fluid flow channel extending axially therethrough a first stop means adapted to abut a first shoulder defined by said barrel to limit the forward movement of said plug member within said barrel, and an annular PATENT
resilient flange member in sealing engagement with said barrel to prevent fluid flow therebetween and retain said plug member within a first portion of said barrel and air is aspirated into and out of said barrel through said cannula means and, upon said plug member being forced forwardly of said first portion of said barrel during the ejection of liquid from said barrel by the force of the liquid acting on said plug member, to cooperate with a second shoulder defined by said barrel to retain said plug member within a second forward portion of said barrel; and a second plug member disposed forwardly of said first plug member and defining means thereon for sealing said fluid channel in said first plug member upon said first plug member being disposed in said second forward portion of said barrel and said piston being retracted toward said rearward end of said barrel, whereby any additional liquid is prevented from being aspirated into said barrel through said now channel in said first plug member thereby rendering said syringe non-reusable.
25. The syringe of Claim 24 wherein said piston rod defines an enlarged portion at the forward end thereof, said portion being received and held within a correspondingly configured recess in said piston such that upon said first plug member being disposed in said second portion of said barrel and said piston being retracted within said barrel, a vacuum is created between said piston and said first plug member causing said enlarged portion of said piston rod to be pulled from said recess, rendering said piston rod incapable of further reciprocation of said piston.
PATENT
PATENT
26. The syringe of Claims 24 or 25 wherein said first plug member defines a conical chamber therein communicating with said fluid channel And wherein said sealing means defined by said second plug member comprises a conical extension thereon adapted to be received within said chamber in said first plug member and seal said flow channel therein.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/478,667 US5254093A (en) | 1990-02-12 | 1990-02-12 | Non-reusable hypodermic syringe |
| US478,667 | 1990-02-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2035015A1 true CA2035015A1 (en) | 1991-08-13 |
Family
ID=23900890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002035015A Abandoned CA2035015A1 (en) | 1990-02-12 | 1991-01-25 | Non-reusable hypodermic syringe |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US5254093A (en) |
| AU (1) | AU7314291A (en) |
| CA (1) | CA2035015A1 (en) |
| WO (1) | WO1991012038A1 (en) |
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| US5254093A (en) * | 1990-02-12 | 1993-10-19 | Medical Appliances, Inc. | Non-reusable hypodermic syringe |
| AU682670B2 (en) * | 1993-02-05 | 1997-10-16 | Becton Dickinson & Company | Syringe needle isolation device |
| US5312348A (en) * | 1993-07-30 | 1994-05-17 | Sans Ten S | Single-usage disposable hypodermic syringe |
| US5795337A (en) * | 1994-02-14 | 1998-08-18 | Becton Dickinson And Company | Syringe assembly and syringe stopper |
| US6090077A (en) * | 1995-05-11 | 2000-07-18 | Shaw; Thomas J. | Syringe plunger assembly and barrel |
| AUPN615095A0 (en) * | 1995-10-24 | 1995-11-16 | Astra Pharmaceuticals Pty Ltd | Tamper evident syringe design |
| FR2794651B1 (en) * | 1999-04-14 | 2003-10-03 | Ussel Bernard D | SAFETY SINGLE USE SYRINGE |
| US6530903B2 (en) | 2000-02-24 | 2003-03-11 | Xiping Wang | Safety syringe |
| US6572584B1 (en) | 2000-08-07 | 2003-06-03 | Retractable Technologies, Inc. | Retractable syringe with reduced retraction force |
| EP2140891B1 (en) | 2001-05-18 | 2013-03-27 | DEKA Products Limited Partnership | Conduit for coupling to a fluid delivery device |
| US8034026B2 (en) | 2001-05-18 | 2011-10-11 | Deka Products Limited Partnership | Infusion pump assembly |
| US11027058B2 (en) | 2006-02-09 | 2021-06-08 | Deka Products Limited Partnership | Infusion pump assembly |
| US11364335B2 (en) | 2006-02-09 | 2022-06-21 | Deka Products Limited Partnership | Apparatus, system and method for fluid delivery |
| US10010669B2 (en) | 2006-02-09 | 2018-07-03 | Deka Products Limited Partnership | Systems and methods for fluid delivery |
| WO2007092637A2 (en) | 2006-02-09 | 2007-08-16 | Deka Products Limited Partnership | Patch-sized fluid delivery systems and methods |
| US11478623B2 (en) | 2006-02-09 | 2022-10-25 | Deka Products Limited Partnership | Infusion pump assembly |
| US11497846B2 (en) | 2006-02-09 | 2022-11-15 | Deka Products Limited Partnership | Patch-sized fluid delivery systems and methods |
| US8881774B2 (en) | 2007-12-31 | 2014-11-11 | Deka Research & Development Corp. | Apparatus, system and method for fluid delivery |
| US8414563B2 (en) | 2007-12-31 | 2013-04-09 | Deka Products Limited Partnership | Pump assembly with switch |
| CA3059311A1 (en) | 2007-12-31 | 2009-07-16 | Deka Products Limited Partnership | Wearable infusion pump assembly |
| US9456955B2 (en) | 2007-12-31 | 2016-10-04 | Deka Products Limited Partnership | Apparatus, system and method for fluid delivery |
| US8900188B2 (en) | 2007-12-31 | 2014-12-02 | Deka Products Limited Partnership | Split ring resonator antenna adapted for use in wirelessly controlled medical device |
| US10188787B2 (en) | 2007-12-31 | 2019-01-29 | Deka Products Limited Partnership | Apparatus, system and method for fluid delivery |
| US10080704B2 (en) | 2007-12-31 | 2018-09-25 | Deka Products Limited Partnership | Apparatus, system and method for fluid delivery |
| US8066672B2 (en) | 2008-10-10 | 2011-11-29 | Deka Products Limited Partnership | Infusion pump assembly with a backup power supply |
| US8016789B2 (en) | 2008-10-10 | 2011-09-13 | Deka Products Limited Partnership | Pump assembly with a removable cover assembly |
| US8267892B2 (en) | 2008-10-10 | 2012-09-18 | Deka Products Limited Partnership | Multi-language / multi-processor infusion pump assembly |
| US8262616B2 (en) | 2008-10-10 | 2012-09-11 | Deka Products Limited Partnership | Infusion pump assembly |
| US9180245B2 (en) | 2008-10-10 | 2015-11-10 | Deka Products Limited Partnership | System and method for administering an infusible fluid |
| US8223028B2 (en) | 2008-10-10 | 2012-07-17 | Deka Products Limited Partnership | Occlusion detection system and method |
| US8708376B2 (en) | 2008-10-10 | 2014-04-29 | Deka Products Limited Partnership | Medium connector |
| GB2470935A (en) * | 2009-06-11 | 2010-12-15 | David Howell Jenkins | Single use syringe hub with moveable bung |
| EP2453948B1 (en) | 2009-07-15 | 2015-02-18 | DEKA Products Limited Partnership | Apparatus, systems and methods for an infusion pump assembly |
| EP2525848B1 (en) | 2010-01-22 | 2016-08-03 | DEKA Products Limited Partnership | System for shape-memory alloy wire control |
| WO2013134519A2 (en) | 2012-03-07 | 2013-09-12 | Deka Products Limited Partnership | Apparatus, system and method for fluid delivery |
| US9707319B2 (en) * | 2013-06-20 | 2017-07-18 | Nordson Corporation | Device and method for improving hydration of a biomaterial |
| WO2015003145A1 (en) | 2013-07-03 | 2015-01-08 | Deka Products Limited Partnership | Apparatus, system and method for fluid delivery |
| WO2016042075A1 (en) * | 2014-09-18 | 2016-03-24 | Novo Nordisk A/S | Drug delivery device with piston driver distal feature |
| EP3784312A1 (en) | 2018-04-24 | 2021-03-03 | DEKA Products Limited Partnership | Apparatus and system for fluid delivery |
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| US2553591A (en) * | 1946-08-16 | 1951-05-22 | Gen Electric | Electric induction apparatus |
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| US4233975A (en) * | 1978-10-04 | 1980-11-18 | Yerman Arthur J | Anti-drug abuse single-use syringe |
| US4493703A (en) * | 1982-03-31 | 1985-01-15 | Butterfield Group | Hypodermic syringe cartridge with non-retractable drive piston |
| US4826984A (en) * | 1984-04-09 | 1989-05-02 | The Board Of Regents For The Oklahoma Agricultural And Mechanical College Acting For And On Behalf Of Oklahoma State University | Heteroarotinoid compounds as anticancer agents |
| NO157085C (en) * | 1986-01-07 | 1988-01-20 | Chr Sandsdalen | DEVICE SPRAY DISPOSAL DEVICE. |
| US4687467A (en) * | 1986-06-11 | 1987-08-18 | C.T.F. Research Company | One-time use medical syringe invention |
| US4804370A (en) * | 1987-03-13 | 1989-02-14 | Habley Medical Technology Corporation | Disease control syringe having a retractable needle |
| IT1217047B (en) * | 1987-03-19 | 1990-03-14 | Cocchi Pietro | INJECTION SYRINGE, INTRAVENOUS SPECIES, MADE TO BE USED ONLY ONCE, WITHOUT POSSIBILITY OF RE-INSPIRATION. |
| US4827547A (en) * | 1987-04-20 | 1989-05-09 | Deutsch Research Laboratories, Ltd. | Multi-channel tone generator for an electronic musical instrument |
| US4781683A (en) * | 1987-04-22 | 1988-11-01 | The Johns Hopkins University | Single-use, self-annulling injection syringe |
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| US4775364A (en) * | 1987-07-10 | 1988-10-04 | Anthony Alles | Non re-useable disposable hypodermic syringe |
| US4850968A (en) * | 1987-07-27 | 1989-07-25 | Ar.Ma.S.R.L. | Self-blocking hypodermic syringe for once-only use, comprising a needle protection cap |
| US4820272A (en) * | 1987-09-02 | 1989-04-11 | Palmer Michele M | Non-reusable hypodermic syringe |
| US4781684A (en) * | 1987-09-03 | 1988-11-01 | Trenner Lewis E | Single use disposable hypodermic syringe |
| US4832693A (en) * | 1987-10-09 | 1989-05-23 | Gloyer Walter W | Disposable syringe |
| WO1989003698A1 (en) * | 1987-10-14 | 1989-05-05 | Butler John H A | Single use syringe |
| US4790822A (en) * | 1987-12-11 | 1988-12-13 | Haining Michael L | Retractable hypodermic safety syringe |
| WO1989006146A1 (en) * | 1987-12-30 | 1989-07-13 | Jacques Verlier | Non-reusable syringe |
| FR2628635B1 (en) * | 1988-03-21 | 1992-10-23 | Microtechnic Sa | SINGLE USE SYRINGE |
| FR2632190A1 (en) * | 1988-06-07 | 1989-12-08 | Michaud Jean | Device preventing the reuse of a syringe and syringe incorporating the device |
| US4919655A (en) * | 1988-07-19 | 1990-04-24 | Cline Jack B | Single use syringe |
| US4952206A (en) * | 1989-05-19 | 1990-08-28 | Anco Engineers, Inc. | Occlusion apparatus for converting a syringe into a non-reversible single use syringe |
| US5254093A (en) * | 1990-02-12 | 1993-10-19 | Medical Appliances, Inc. | Non-reusable hypodermic syringe |
-
1990
- 1990-02-12 US US07/478,667 patent/US5254093A/en not_active Expired - Fee Related
-
1991
- 1991-01-25 CA CA002035015A patent/CA2035015A1/en not_active Abandoned
- 1991-02-11 AU AU73142/91A patent/AU7314291A/en not_active Abandoned
- 1991-02-11 WO PCT/US1991/000945 patent/WO1991012038A1/en active Search and Examination
-
1993
- 1993-10-19 US US08/139,191 patent/US5505703A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| AU7314291A (en) | 1991-09-03 |
| US5505703A (en) | 1996-04-09 |
| WO1991012038A1 (en) | 1991-08-22 |
| US5254093A (en) | 1993-10-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |