WO2002072182A1 - Improved non-reusable syringe - Google Patents
Improved non-reusable syringe Download PDFInfo
- Publication number
- WO2002072182A1 WO2002072182A1 PCT/AU2002/000297 AU0200297W WO02072182A1 WO 2002072182 A1 WO2002072182 A1 WO 2002072182A1 AU 0200297 W AU0200297 W AU 0200297W WO 02072182 A1 WO02072182 A1 WO 02072182A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plunger
- syringe
- outer barrel
- barrel
- inner barrel
- Prior art date
Links
- 0 C*1(C2)C*=C2C1 Chemical compound C*1(C2)C*=C2C1 0.000 description 1
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
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31501—Means for blocking or restricting the movement of the rod or piston
-
- 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
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
- A61M5/326—Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user
-
- 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
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31501—Means for blocking or restricting the movement of the rod or piston
- A61M2005/31508—Means for blocking or restricting the movement of the rod or piston provided on the piston-rod
-
- 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
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
- A61M5/326—Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user
- A61M2005/3261—Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user triggered by radial deflection of the anchoring parts between sleeve and syringe barrel, e.g. spreading of sleeve retaining hooks having slanted surfaces by engagement with conically shaped collet of the piston rod during the last portion of the injection stroke of the plunger
Definitions
- the invention relates to syringes and in particular to single use or non- reusable syringes with automatic retracting needle.
- the invention provides a syringe including an outer barrel having first and second ends, an inner barrel slidable longitudinally within said outer barrel and adapted to support a needle at one end thereof and which needle projects through an aperture in said first end of said outer barrel, said needle being in fluid communication with a fluid retaining chamber of said inner barrel, and a plunger within said chamber and actuable to draw fluid into said chamber and expel fluid from said chamber via said needle, said plunger being connected to an actuating rod extending out from the other end of said inner barrel and the second end of said outer barrel, said outer barrel having first and second spaced retaining means on the inner wall surface thereof, and said inner barrel having latching means for engaging said first or second retaining means and latching said inner barrel in either of two positions relative to said outer barrel, a first said position wherein said needle projects from said outer barrel and is in
- Figure 1 is a sectional side elevation of a syringe according to one embodiment of the invention, shown in an initial position;
- Figure 1(a) is an enlargement of the portion of Figure 1 shown in the circle "A";
- Figure 2 is similar to Figure 1 but shows the syringe in a first stage of operation
- Figure 2(a) is an enlargement of the portion of Figure 2 shown in the circle "B";
- Figure 3 is similar to Figs. 1 and 2 but shows the syringe in a second stage of operation;
- Figure 4 is similar to Figs. 1-3 but shows the syringe in a third stage of operation
- Figure 4(a) is an enlargement of the portion of Figure 4 shown in the circle "C";
- Figure 5 is similar to Figs. 1-4 but shows the syringe in a fourth stage of operation;
- Figure 5(a) is an enlargement of the portion of Figure 5 shown in the circle "D";
- Figure 6 is an exploded perspective view of the syringe of Figs. 1-5;
- Figure 7 is a view similar to Figure 1 showing an alternative embodiment of the invention in an initial position
- Figure 7(a) is an enlargement of the portion of Figure 7 shown in the circle "E".
- Figure 8 is a view similar to Figure 7 but showing the syringe in a first stage of operation;
- Figure 8(a) is an enlargement of the portion of Figure 8 shown in the circle
- Figure 9 is a view similar to Figs. 7 and 8 showing the syringe in a fourth stage of operation;
- Figure 9(a) is an enlargement of the portion of Figure 9 shown in the circle "G";
- Figure 10 is a view similar to Figs. 7-9 showing the syringe in a fifth stage of operation;
- Figure 10(a) is an enlargement of the portion of Figure 10 shown in the circle "FT;
- Figure 11 is an exploded perspective view of the syringe of Figs. 7-10 inclusive;
- Figure 12 is a side elevation of a syringe as shown in either of the specific embodiments.
- Figure 13 is similar to Figure 12 but shows the syringe rotated through 90° about its longitudinal axis
- Figure 14 is an enlarged sectional view of part of a modified flexible arm for use in the described embodiments. Throughout the drawings like or similar parts have the same reference number.
- the syringe 10 comprises an outer barrel 11 which apart from openings at each end is a completely aperture free cylindrical barrel.
- An inner barrel 12 fits within the outer barrel 11 in a manner so as to slide longitudinally back and forth within the outer barrel 11 in engagement therewith.
- the inner barrel 12 has a narrow neck 13 at one end and is open at the opposite end 14.
- the neck 13 is adapted to accommodate a needle housing 15 incorporating a needle 16.
- the needle 16 is in fluid communication with a chamber 17 within the inner barrel 12. Once fitted to the neck 13 the needle housing 15 and needle 16 project from a first end 18 of the outer barrel 11.
- a spring 20 is located inside the first end 18 of the outer barrel 11 and acts on the inner barrel 12 to bias the inner barrel 12 towards a second end 19 of the outer barrel 11.
- a plunger 21 is located within the inner barrel 12 and is mounted at one end of a plunger actuating rod 22.
- the plunger actuating rod 22 enters the second end 19 of the outer barrel and the open end 14 of the inner barrel.
- the outer end of the plunger rod 22 is provided with a limit catch 23 which will be described later.
- a flange 24 at the second end 19 of the outer barrel facilitates operation of the syringe.
- An end flange 34 facilitates operation of the plunger actuating rod 22.
- the outer barrel has first and second annular grooves 25 and 26, respectively, in the inner surface thereof.
- the purpose of the grooves 25 and 26 will become apparent hereinbelow.
- the inner barrel 12 has a pair of diametrically opposed longitudinal slits 27 (see Figure 6) at the open end 14 and the slits 27 define a pair of opposed flexible arms 28.
- the flexible arms 28 have a lip 29 extending around the extremity thereof for engaging in one or other of the annular grooves 25 and 26.
- the slits 27 allow the flexible arms 28 to move slightly towards each other for the purpose of disengaging the lip 29 from one or other of the grooves 25 and 26.
- the configuration of the inner barrel and particularly the flexible arms 28 is more evident in Figure 6.
- the plunger actuating rod 22 is provided with an annular skirt 30 having a tapered edge for engaging the respective arms 28 to remove the lips 29 from the respective grooves 25 and 26 as will become apparent hereinbelow.
- the flexible arms 28 are much narrower in construction (see Figure 11) and comprise essentially a pair of opposed fingers which extend from the open end 14 of the inner barrel 12.
- the flexible arms or fingers 28 again have lips 29 which engage in one or the other of the annular grooves 25, 26.
- the arms 28 have latch members 31 which extend towards the second end 19 of the outer barrel 11.
- the actuating rod 22 is provided with an annular skirt 32 similar to the skirt 30 of the previous embodiment but having an inwardly directed ridge 33 extending around the extremity of the skirt. Otherwise, the construction of the syringe in the embodiment of Figures 7-11 is the same as in the earlier embodiment.
- the outer end of the plunger actuating rod 22 incorporates a limit catch 23.
- the limit catch prevents the plunger actuating rod 22 and hence the plunger 21 from moving to the forward or needle end extremity of the inner barrel 12 on the first operation of the syringe.
- the limit catch changes its construction whereby on the next depression of the plunger actuating rod, the plunger is able to move to the forward most extremity of its movement in the inner barrel.
- fingers 36 of the limit catch 23 engage with the end 19 of the outer barrel 11 and are pivoted from the position shown in Figure 1 to the position shown in Figure 2 whereby further movement (depression) of the plunger is prevented. This pivoting is facilitated by a flexible joint between the ends of each finger. The fingers 36 are then locked in this pivoted position.
- This pivotal movement of the fingers 36 severs a thin membrane 38 (see Figure 2(a)) which initially holds arms 37 of the limit catch 23 inwardly on the body of rod 22. Consequently, on withdrawal of the plunger rod 22 the arms 37 spring outwardly or spread to the position shown in Figure 3 wherein tongue and groove 39 locks the arms 37 in the new position.
- the fingers fail to engage the end of the outer barrel 11 and hence extended depression of the plunger (to the end of inner barrel 12) is facilitated.
- the syringe is packaged after manufacture in a sealed package without the needle housing 15 and needle 16 and is in a condition where the inner barrel and plunger are in a position substantially as shown in Figures 1 and 7, respectively.
- the user removes the syringe from the package and installs a needle housing 15 with attached needle 16 onto the neck 13 of the inner barrel 12.
- the plunger actuating rod 22 is then depressed by applying thumb pressure on end flange 34 whilst holding the outer barrel 11 between first and second fingers until the actuating rod 22 is fully depressed into the inner barrel 12 and the limit catch 23 prevents further movement.
- the needle 16 is placed in the drug and the plunger is drawn outwardly to a position shown in Figure 3.
- the inner barrel still remains firmly fixed relative to the outer barrel.
- the next action is to depress the plunger to expel the drug and on this actuation of the plunger actuating rod 22 the plunger moves all the way to the end of the inner barrel 12 as shown in Figure 4.
- the limit catch 23 does not restrict the inner movement of the actuating rod 22 on this second depression.
- the protrusions 30 on the rod 22 engage the flexible arms 28 and cam the lip 29 on each arm 28 out from the annular groove 25 as is evident in Figure 4(a).
- the spring 20 forces the inner barrel towards the second end 19 of the outer barrel, since there is nothing to stop relative movement between the two barrels.
- a notch 35 in the actuating rod 22 enables the part of the actuating rod projecting from the outer barrel to be broken off as a means of preventing further depression of the plunger but even if this action is not performed it is not possible to re-use the syringe.
- some of the flexible arms 28 on the inner barrel differ to those previously described.
- a profile of a modified flexible arm 28 is shown in Figure 14.
- the total number of arms 28 on the inner barrel 12 is increased and preferably comprises a total of at least four such arms comprising at least two of the modified arms.
- the modified arms 28 are shorter than the other arms which have a profile the same as those shown in Figures 1-6 but are thin fingers as in the embodiment of Figures 7-11. In the case of a total number of four arms they are uniformly spaced around the barrel 12 with the two long arms being diametrically opposed and the two short arms likewise.
- the longer arms are initially latched in the annular groove 25 and are released therefrom in the manner described above, on the first full depression of the plunger. It will be appreciated that the shorter arms 28 are not engaged by the protrusions 30 or skirt 32 as the case may be. Such engagement is with the longer arms. As the plunger retracts the shorter of the arms 28, which are not located in the groove 25 must pass over the groove 25 in moving towards the second end 19. This is achieved by the angled surface 39 being cammed over the edge of the groove 25 nearest the second end 19. In other words, the shorter arms 28 are deformed inwardly towards the longitudinal axis of the syringe as the plunger retracts under the bias of the spring 20 and they glide over the groove 25.
- the longer arms 28 are held away from the groove 26 since they are engaged with the plunger protrusions 30 or skirt 32 under bias from spring 20.
- the shorter fingers are under no such influence and are able to spring outwardly and engage the groove 26 when the inner barrel reaches its furthermost position towards the second end.
- the right angled lip 40 of the shorter arms is firmly located in the groove 26 and the inner barrel is thus prevented from ever moving within the outer barrel towards the first end 18. The needle is thus permanently retracted within the outer barrel and the syringe cannot be re-used.
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002571139A JP2004528075A (en) | 2001-03-14 | 2002-03-14 | Improved non-reusable syringe |
US10/471,813 US6905478B2 (en) | 2001-03-14 | 2002-03-14 | Non-reusable syringe |
AT02706516T ATE434456T1 (en) | 2001-03-14 | 2002-03-14 | NON-REUSABLE SYRINGE |
AU2002240702A AU2002240702B2 (en) | 2001-03-14 | 2002-03-14 | Improved non-reusable syringe |
EP02706516A EP1377331B1 (en) | 2001-03-14 | 2002-03-14 | Non-reusable syringe |
CA002440898A CA2440898C (en) | 2001-03-14 | 2002-03-14 | Improved non-reusable syringe |
UA2003109296A UA74636C2 (en) | 2001-03-14 | 2002-03-14 | Non-reusable syringe |
DE60232717T DE60232717D1 (en) | 2001-03-14 | 2002-03-14 | NOT REUSABLE SYRINGE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPR3730 | 2001-03-14 | ||
AUPR3730A AUPR373001A0 (en) | 2001-03-14 | 2001-03-14 | Improved non-reusable syringe |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002072182A1 true WO2002072182A1 (en) | 2002-09-19 |
Family
ID=3827738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2002/000297 WO2002072182A1 (en) | 2001-03-14 | 2002-03-14 | Improved non-reusable syringe |
Country Status (12)
Country | Link |
---|---|
US (1) | US6905478B2 (en) |
EP (1) | EP1377331B1 (en) |
JP (1) | JP2004528075A (en) |
CN (1) | CN1314465C (en) |
AT (1) | ATE434456T1 (en) |
AU (2) | AUPR373001A0 (en) |
CA (1) | CA2440898C (en) |
DE (1) | DE60232717D1 (en) |
RU (1) | RU2289431C2 (en) |
UA (1) | UA74636C2 (en) |
WO (1) | WO2002072182A1 (en) |
ZA (1) | ZA200307954B (en) |
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US8105292B2 (en) | 2008-02-11 | 2012-01-31 | Safety Syringes, Inc. | Reconstitution means for safety device |
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US8845595B2 (en) | 2003-03-25 | 2014-09-30 | Tech Group Europe Limited | Device for protection of the needle for a syringe and injection device comprising a syringe and said protection device |
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Also Published As
Publication number | Publication date |
---|---|
AUPR373001A0 (en) | 2001-04-12 |
ZA200307954B (en) | 2004-10-13 |
CA2440898C (en) | 2006-02-07 |
JP2004528075A (en) | 2004-09-16 |
US6905478B2 (en) | 2005-06-14 |
UA74636C2 (en) | 2006-01-16 |
CA2440898A1 (en) | 2002-09-19 |
EP1377331A4 (en) | 2007-05-16 |
ATE434456T1 (en) | 2009-07-15 |
CN1314465C (en) | 2007-05-09 |
RU2289431C2 (en) | 2006-12-20 |
RU2003130471A (en) | 2005-03-20 |
DE60232717D1 (en) | 2009-08-06 |
EP1377331A1 (en) | 2004-01-07 |
AU2002240702B2 (en) | 2004-12-16 |
EP1377331B1 (en) | 2009-06-24 |
US20040147875A1 (en) | 2004-07-29 |
CN1505535A (en) | 2004-06-16 |
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