CA1178867A - Cutting device and method of manufacture - Google Patents
Cutting device and method of manufactureInfo
- Publication number
- CA1178867A CA1178867A CA000387733A CA387733A CA1178867A CA 1178867 A CA1178867 A CA 1178867A CA 000387733 A CA000387733 A CA 000387733A CA 387733 A CA387733 A CA 387733A CA 1178867 A CA1178867 A CA 1178867A
- Authority
- CA
- Canada
- Prior art keywords
- secured
- strip
- cutting blade
- flat face
- face portion
- 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.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3209—Incision instruments
- A61B17/3211—Surgical scalpels, knives; Accessories therefor
- A61B17/3213—Surgical scalpels, knives; Accessories therefor with detachable blades
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/08—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by means of electrically-heated probes
- A61B18/082—Probes or electrodes therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
- B23P15/40—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools shearing tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B3/00—Hand knives with fixed blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B7/00—Hand knives with reciprocating motor-driven blades
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00831—Material properties
- A61B2017/00853—Material properties low friction, hydrophobic and corrosion-resistant fluorocarbon resin coating (ptf, ptfe, polytetrafluoroethylene)
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/00107—Coatings on the energy applicator
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00964—Features of probes
- A61B2018/0097—Cleaning probe surfaces
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1405—Electrodes having a specific shape
- A61B2018/1412—Blade
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1034—Overedge bending of lamina about edges of sheetlike base
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/283—With means to control or modify temperature of apparatus or work
- Y10T83/293—Of tool
Abstract
ABSTRACT
The cutting instrument of this invention is made by threading a heater assembly through a hollow cutting instrument body. A blade having a shank and a blade body including a cutting edge is secured within the hollow cutting instrument body at its shank portion such that the blade body blade extends from the hollow cutting instrument body. The heating assembly is secured to the blade body and to the cutting instrument body. The blade body is coated with a non-stick means.
The cutting instrument of this invention is made by threading a heater assembly through a hollow cutting instrument body. A blade having a shank and a blade body including a cutting edge is secured within the hollow cutting instrument body at its shank portion such that the blade body blade extends from the hollow cutting instrument body. The heating assembly is secured to the blade body and to the cutting instrument body. The blade body is coated with a non-stick means.
Description
1~7~ 7 This invention relates to a cutting instrument for use in surgery.
The control of bleeding during surgery accounts for a major portion of the total time involved in a surgical operation.
When tissue is incised, the attendant bleeding obscures the surgeon's vision, reduces his surgical precision and often dictates slow and elaborate procedures in surgical operation.
Typically, each bleeding vessel must be grasped in a surgical clamp in order to stop the flow of blood, and the tissue and vessel within each clamp is then tied with pieces of fine thread. Such ligated masses of tissue subsequently die and decompose thus tending to retard healing and providing a possible site for infection. A substantial amount of effort with regard to the heating of a cutting instrument so as to provide simultaneous hemostatis has been conducted by Robert F. Shaw and patents related to such efforts include U.S.
Reissue Patent No. 29,088 which issued on January 11, 1977, U.S. Reissue Patent No. 30,190 which issued on January 15, 1980, U.S. Patent No. 4,089,336 which issued on May 16, 1978, U.S. Patent No. 4,091,813 issued on May 30, 1978, and U.S.
Patent No, 4,185,632 which issued on January 29, 1980.
It is an object of the present invention to provide an improved cutting instrument for use in surgery.
According to one aspect of the invention, there is provided a surgical cutting blade adapted to be heated to a ~ predetermined temperature within a predetermined temperature range to provide simultaneous hemostasis during surgery to control bleeding, said cutting blade comprising a metallic member having a pair of opposed flat face portions and a tapered cutting edge portion disposed therebetween along one edge of the member, a heating structure secured to one of the flat face portions substantially throughout the length of the ~3 ` :li7~867 member having said cutting edge thereon for heating said length of the member thoroughly .including the cutting edge thereof, said heating structure comprising an elongate strip of conductive material having a thickness in the order of 0.4 mils secured over substantially all of the area of said one flat face portion along said length of the member and being formed in a very narrow width relative to the width of the member, an adhesive directly securing said conductive strip to said one face portion while spacing it from said face portion, said adhesive having thermally conductive and electrically insulative properties, and electrical leads directly connected to said conductive material strip and directed away from the end of the member containing said cutting edge for connecting the strip to an external power source.
Figures 1, 2 and 3 are pictorial views illustrating the subject matter of this invention;
Figure 4 is a cross-sectional view taken about 4-4 of Figure 2;
~ , -la-1.17~86'7 Figure 5 is a partial pictorial view illustrating the subject matter of this invention;
Figures 6 and 7 are cross-section views taken about 3-3 and 4-4 of Figure 5;
Figure 8 is a pictorial view illustrating the subject matter of this invention.
Referring now to Figure 6 of the drawings, there is shown a cutting instrument 1 including a steel substrate 3. A copper composition 5 having a yield strength of at 10 least 25,000 p.s.i. is laminated to the steel substrate 3. The copper composition 5 is preferably an alumina dispersion strengthened copper wherein the alumina present in the copper composition is from between about 0.1 and about 0.5 percent by weight of the total composi-tion. Preferably the alumina-copper dispersion is (-r~A~ J
A of the type referred to and sold commercially as GIidcop~
by the Glidden Company. The steel substrate 3 and copper composition laminate 5 should be capable of experiencing a heat treatment at least to a temperature of approximate-20 ly 1500 degrees F.
A heater assembly(77?, including a heater means 7preferably formed of copper in a strip is secured to the copper composition laminate 5 by means of an adhesive 35 that includes an electrically insulative and thermally conductive filler material 13 admixed with a material 15 selected from the group consisting of acrylic, polyimide, polyamide, silicone, phenolic, and epoxy resins. The adhesive filler material 13 is preferably made up of industrial-grade diamonds. In one embodiment, the 30 diameter of such industrial-grade diamond filler material 13 is such that the material spans the distance between the heater means 7 and the copper composition 5 in order to provide the optimum thermal transfer between the heater means 7 and the copper composition 5.
The steel substrate 3 includes a cutting edge 17 which is preferably coated with a non-stick means 9 in order to preclude the cutting edge from sticking to a subject upon which a cutting operation is per~ormed.
Further, at least a portion of the balance of the cutting 10 instrument is also similarly coated by non-stick means 11. Preferably the non-stick means 9 applied to the cutting edge 17 is a dispersion of fluorocarbon particles within a silicone adhesive binder while the non-stick means applied to the balance of the cutting instrument is a fluorocarbon composition. The non-stick means 9 and 11 are preferably a form of polytetrafluoroethylene, and chosen from the group consisting of tetrafluoroethane, polyfluorinated alcoxy and fluorinated ethylene polymer.
In a preferred embodiment the heater assembly includes a 20 polyimide 33 backing material upon which the heater means 7 and adhesive 35 may be disposed prior to being secured to the copper composition 5. The cutting blade assembliQs are stacked one atop the other such that each blade body is masked by the next adjacent blade body and the cutting edges 17 sprayed with a non-stick 9. The cutting instru-ment is manufactured by threading the heater assembly 77 including the heater means 7 and its attendant backing material 33 and adhesive 35 through the hollow cutting instrument body 41 as shown in Figure 4. The distal end . li7~867 of this heater assembly 77 perferably includes an aper-ture 43 which is secured about peg 45 of the hollow cutting instrument body. The shank 47 of the steel blade 3 is secured within the hollow cutting instrument body 41 such that the blade body 49 and cutting edge 17 extend from the hollow cutting instrument body 41. The proximal portion of heating assembly 77 is then laminated to the blade body 49 as shown in Figure 6. This laminating process is preferably carried out at a pressure between 10 about 100 p.s.i. and about 500 p.s.i. and a temperature between about 100 C and about 250 C. Preferably the hollow cutting blade body 41 is of a thermoplastic material such that peg 45 may be heated so as to expand and heat stake the distal end of the heater assembly 77 to the hollow cutting blade body 41.
Then the assemblies are placed in a boot conveyor 51 with the blade body 49 extending outward and the blade body 49 is coated with a non-stick 11.
The heater assembly 77 preferably includes a heater 20 means 7 of copper such that that portion of the heater means 77 which wraps about the distal end of the hollow cutting instrument body 41 and attaches at peg 45 allows for electrical contact with the portion of heater assem-bly 77 in contact with the laminate of steel 3 and copper composition 5. Thus the heat assembly 77 directly interfaces between the blade laminate of steel 3 and copper composition 5 and the hollow cutting instrument body 41 adapted to be directly inserted in surgical handle 55 and make electrical contact therewith without 30 intermediate conductors~
1~7886~
The structure of the present invention having been described, its method of operation will now be discussed.
Upon application of electrical current from an external power heater means 7 is heated and heat is thermally conducted through the adhesive 35 to the copper composi-tion 5 and the steel substrate 3 with its cutting edge 17. Such heat transfer from the heater means 7 to the steel substrate 3 is carried out in accordance with the heate transfer equation q=K a delta T where q is the delta X
10 amount of heat transferred, K is the thermal heat trans-fer coefficient, a is the area through which the heat is transferred, delta T is the differential temperature and delta X is the thickness of the material through which the heat is transferred.
In a preferred embodiment, the thickness of the steel substrate 3 is approximately 6 mils and the thick-ness of the copper composition 5 is approximately 6 mils.
Further, the thickness of the heater means 7 is prefer-ably approximately 0.4 mils, while the thickness of the 20 adhesive 35 is preferably about 0.4 mils. The backing material 37 is preferably approximately 2 mils in thick-ness. Due to the physical parameters regarding heat transfer, the cutting instrument of the present invention allows for the cutting instrument to be maintained at a substantially constant temperature within a pre-determined range of preferably between about 100 degrees C and about 300 degrees C.
It is obvious that certain changes can be made to the preferred form of the invention as described above.
117~8~7 Accoedingly, the claims should be given an interpeeta-tion commensurate with the scope of the invention as set out in the claims appended hereto.
.
.
,:
,: , . ~ .
The control of bleeding during surgery accounts for a major portion of the total time involved in a surgical operation.
When tissue is incised, the attendant bleeding obscures the surgeon's vision, reduces his surgical precision and often dictates slow and elaborate procedures in surgical operation.
Typically, each bleeding vessel must be grasped in a surgical clamp in order to stop the flow of blood, and the tissue and vessel within each clamp is then tied with pieces of fine thread. Such ligated masses of tissue subsequently die and decompose thus tending to retard healing and providing a possible site for infection. A substantial amount of effort with regard to the heating of a cutting instrument so as to provide simultaneous hemostatis has been conducted by Robert F. Shaw and patents related to such efforts include U.S.
Reissue Patent No. 29,088 which issued on January 11, 1977, U.S. Reissue Patent No. 30,190 which issued on January 15, 1980, U.S. Patent No. 4,089,336 which issued on May 16, 1978, U.S. Patent No. 4,091,813 issued on May 30, 1978, and U.S.
Patent No, 4,185,632 which issued on January 29, 1980.
It is an object of the present invention to provide an improved cutting instrument for use in surgery.
According to one aspect of the invention, there is provided a surgical cutting blade adapted to be heated to a ~ predetermined temperature within a predetermined temperature range to provide simultaneous hemostasis during surgery to control bleeding, said cutting blade comprising a metallic member having a pair of opposed flat face portions and a tapered cutting edge portion disposed therebetween along one edge of the member, a heating structure secured to one of the flat face portions substantially throughout the length of the ~3 ` :li7~867 member having said cutting edge thereon for heating said length of the member thoroughly .including the cutting edge thereof, said heating structure comprising an elongate strip of conductive material having a thickness in the order of 0.4 mils secured over substantially all of the area of said one flat face portion along said length of the member and being formed in a very narrow width relative to the width of the member, an adhesive directly securing said conductive strip to said one face portion while spacing it from said face portion, said adhesive having thermally conductive and electrically insulative properties, and electrical leads directly connected to said conductive material strip and directed away from the end of the member containing said cutting edge for connecting the strip to an external power source.
Figures 1, 2 and 3 are pictorial views illustrating the subject matter of this invention;
Figure 4 is a cross-sectional view taken about 4-4 of Figure 2;
~ , -la-1.17~86'7 Figure 5 is a partial pictorial view illustrating the subject matter of this invention;
Figures 6 and 7 are cross-section views taken about 3-3 and 4-4 of Figure 5;
Figure 8 is a pictorial view illustrating the subject matter of this invention.
Referring now to Figure 6 of the drawings, there is shown a cutting instrument 1 including a steel substrate 3. A copper composition 5 having a yield strength of at 10 least 25,000 p.s.i. is laminated to the steel substrate 3. The copper composition 5 is preferably an alumina dispersion strengthened copper wherein the alumina present in the copper composition is from between about 0.1 and about 0.5 percent by weight of the total composi-tion. Preferably the alumina-copper dispersion is (-r~A~ J
A of the type referred to and sold commercially as GIidcop~
by the Glidden Company. The steel substrate 3 and copper composition laminate 5 should be capable of experiencing a heat treatment at least to a temperature of approximate-20 ly 1500 degrees F.
A heater assembly(77?, including a heater means 7preferably formed of copper in a strip is secured to the copper composition laminate 5 by means of an adhesive 35 that includes an electrically insulative and thermally conductive filler material 13 admixed with a material 15 selected from the group consisting of acrylic, polyimide, polyamide, silicone, phenolic, and epoxy resins. The adhesive filler material 13 is preferably made up of industrial-grade diamonds. In one embodiment, the 30 diameter of such industrial-grade diamond filler material 13 is such that the material spans the distance between the heater means 7 and the copper composition 5 in order to provide the optimum thermal transfer between the heater means 7 and the copper composition 5.
The steel substrate 3 includes a cutting edge 17 which is preferably coated with a non-stick means 9 in order to preclude the cutting edge from sticking to a subject upon which a cutting operation is per~ormed.
Further, at least a portion of the balance of the cutting 10 instrument is also similarly coated by non-stick means 11. Preferably the non-stick means 9 applied to the cutting edge 17 is a dispersion of fluorocarbon particles within a silicone adhesive binder while the non-stick means applied to the balance of the cutting instrument is a fluorocarbon composition. The non-stick means 9 and 11 are preferably a form of polytetrafluoroethylene, and chosen from the group consisting of tetrafluoroethane, polyfluorinated alcoxy and fluorinated ethylene polymer.
In a preferred embodiment the heater assembly includes a 20 polyimide 33 backing material upon which the heater means 7 and adhesive 35 may be disposed prior to being secured to the copper composition 5. The cutting blade assembliQs are stacked one atop the other such that each blade body is masked by the next adjacent blade body and the cutting edges 17 sprayed with a non-stick 9. The cutting instru-ment is manufactured by threading the heater assembly 77 including the heater means 7 and its attendant backing material 33 and adhesive 35 through the hollow cutting instrument body 41 as shown in Figure 4. The distal end . li7~867 of this heater assembly 77 perferably includes an aper-ture 43 which is secured about peg 45 of the hollow cutting instrument body. The shank 47 of the steel blade 3 is secured within the hollow cutting instrument body 41 such that the blade body 49 and cutting edge 17 extend from the hollow cutting instrument body 41. The proximal portion of heating assembly 77 is then laminated to the blade body 49 as shown in Figure 6. This laminating process is preferably carried out at a pressure between 10 about 100 p.s.i. and about 500 p.s.i. and a temperature between about 100 C and about 250 C. Preferably the hollow cutting blade body 41 is of a thermoplastic material such that peg 45 may be heated so as to expand and heat stake the distal end of the heater assembly 77 to the hollow cutting blade body 41.
Then the assemblies are placed in a boot conveyor 51 with the blade body 49 extending outward and the blade body 49 is coated with a non-stick 11.
The heater assembly 77 preferably includes a heater 20 means 7 of copper such that that portion of the heater means 77 which wraps about the distal end of the hollow cutting instrument body 41 and attaches at peg 45 allows for electrical contact with the portion of heater assem-bly 77 in contact with the laminate of steel 3 and copper composition 5. Thus the heat assembly 77 directly interfaces between the blade laminate of steel 3 and copper composition 5 and the hollow cutting instrument body 41 adapted to be directly inserted in surgical handle 55 and make electrical contact therewith without 30 intermediate conductors~
1~7886~
The structure of the present invention having been described, its method of operation will now be discussed.
Upon application of electrical current from an external power heater means 7 is heated and heat is thermally conducted through the adhesive 35 to the copper composi-tion 5 and the steel substrate 3 with its cutting edge 17. Such heat transfer from the heater means 7 to the steel substrate 3 is carried out in accordance with the heate transfer equation q=K a delta T where q is the delta X
10 amount of heat transferred, K is the thermal heat trans-fer coefficient, a is the area through which the heat is transferred, delta T is the differential temperature and delta X is the thickness of the material through which the heat is transferred.
In a preferred embodiment, the thickness of the steel substrate 3 is approximately 6 mils and the thick-ness of the copper composition 5 is approximately 6 mils.
Further, the thickness of the heater means 7 is prefer-ably approximately 0.4 mils, while the thickness of the 20 adhesive 35 is preferably about 0.4 mils. The backing material 37 is preferably approximately 2 mils in thick-ness. Due to the physical parameters regarding heat transfer, the cutting instrument of the present invention allows for the cutting instrument to be maintained at a substantially constant temperature within a pre-determined range of preferably between about 100 degrees C and about 300 degrees C.
It is obvious that certain changes can be made to the preferred form of the invention as described above.
117~8~7 Accoedingly, the claims should be given an interpeeta-tion commensurate with the scope of the invention as set out in the claims appended hereto.
.
.
,:
,: , . ~ .
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A surgical cutting blade adapted to be heated to a pre-determined temperature within a predetermined temperature range to provide simultaneous hemostasis during surgery to control bleeding, said cutting blade comprising a metallic member having a pair of opposed flat face portions and a tapered cutting edge portion disposed therebetween along one edge of the member, a heating structure secured to one of the flat face portions substantially throughout the length of the member having said cutting edge thereon for heating said length of the member thoroughly including the cutting edge thereof, said heating structure comprising an elongate strip of conductive material having a thickness in the order of 0.4 mils secured over substantially all of the area of said one flat face portion along said length of the member and being formed in a very narrow width relative to the width of the member, an adhesive directly securing said conductive strip to said one face portion while spacing it from said face portion, said adhesive having thermally conductive and elec-trically insulative properties, and electrical leads directly connected to said conductive material strip and directed away from the end of the member containing said cutting edge for connecting the strip to an external power source.
2. A surgical cutting blade according to claim 1 wherein said adhesive includes a particulate filler material including particles having a diameter identical to the spacing of the conductive strip and the face portion of the metallic member so as to serve as the spacing means, said filler material having thermally conductive and electrically insulative properties.
3. A surgical cutting blade according to claim 1 including a backing strip of electrically insulative material secured to said heating structure on the side thereof opposite to the side which is adhesively secured to said one flat face portion of said metallic member.
4. A surgical cutting blade according to claim 1 wherein said metallic member is comprised of a copper-steel laminate with the copper layer forming said one flat face portion to which the heating structure is secured.
5. A surgical cutting blade according to claim 1 wherein said metallic member is comprised of a copper steel laminate with both of said flat face portions being formed of copper layers and with a steel substrate extending between the copper layers and including at least the cutting tip portion of said cutting edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000460923A CA1200167A (en) | 1980-10-28 | 1984-08-13 | Cutting device |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201,603 | 1980-10-28 | ||
| US06/201,603 US4485810A (en) | 1980-10-28 | 1980-10-28 | Surgical cutting blade |
| US06/278,955 US4481057A (en) | 1980-10-28 | 1981-06-30 | Cutting device and method of manufacture |
| US278,955 | 1981-06-30 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000460923A Division CA1200167A (en) | 1980-10-28 | 1984-08-13 | Cutting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1178867A true CA1178867A (en) | 1984-12-04 |
Family
ID=26896938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000387733A Expired CA1178867A (en) | 1980-10-28 | 1981-10-09 | Cutting device and method of manufacture |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4481057A (en) |
| AU (1) | AU552383B2 (en) |
| CA (1) | CA1178867A (en) |
| DE (1) | DE3140671A1 (en) |
| FR (1) | FR2492721B1 (en) |
| GB (1) | GB2085765B (en) |
| NL (1) | NL8104881A (en) |
Families Citing this family (64)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4501951A (en) * | 1982-08-16 | 1985-02-26 | E. I. Du Pont De Nemours And Company | Electric heating element for sterilely cutting and welding together thermoplastic tubes |
| US4461951A (en) * | 1982-08-16 | 1984-07-24 | E. I. Du Pont De Nemours And Company | Method of monitoring the temperature of a sterile docking cutting means |
| US4754754A (en) * | 1984-08-20 | 1988-07-05 | Garito Jon C | Electrosurgical handpiece for blades and needles |
| GB8428411D0 (en) * | 1984-11-09 | 1984-12-19 | Micra Ltd | Laser knives |
| US4640279A (en) * | 1985-08-08 | 1987-02-03 | Oximetrix, Inc. | Combination surgical scalpel and electrosurgical instrument |
| DE3673780D1 (en) * | 1985-12-16 | 1990-10-04 | Akzo Nv | CONNECTING HOLLOW PROFILE BODIES TO A PLASTIC PLATE, ESPECIALLY FOR THE PRODUCTION OF HEAT EXCHANGERS. |
| DE3614339A1 (en) * | 1986-04-28 | 1987-10-29 | Akzo Gmbh | HEAT EXCHANGER AND METHOD FOR PRODUCING HEAT EXCHANGER |
| DE3614342A1 (en) * | 1986-04-28 | 1987-10-29 | Akzo Gmbh | HEAT AND / OR FABRIC EXCHANGER AND METHOD FOR PRODUCING HEAT AND / OR FABRIC EXCHANGER |
| GB2217866B (en) * | 1988-04-15 | 1992-02-12 | Oji Paper Co | Thermal transfer image-receiving sheet |
| US5080660A (en) * | 1990-05-11 | 1992-01-14 | Applied Urology, Inc. | Electrosurgical electrode |
| US5095052A (en) * | 1990-06-28 | 1992-03-10 | The United States Of America As Represented By The Secretary Of The Air Force | Low impulse coatings |
| DE4212053C1 (en) * | 1992-04-10 | 1996-01-11 | Erbe Elektromedizin | Metal surgical instrument for HF or laser surgery |
| US5308311A (en) * | 1992-05-01 | 1994-05-03 | Robert F. Shaw | Electrically heated surgical blade and methods of making |
| US5593406A (en) * | 1992-05-01 | 1997-01-14 | Hemostatic Surgery Corporation | Endoscopic instrument with auto-regulating heater and method of using same |
| US5480398A (en) * | 1992-05-01 | 1996-01-02 | Hemostatic Surgery Corporation | Endoscopic instrument with disposable auto-regulating heater |
| CA2134894A1 (en) * | 1992-05-01 | 1993-11-11 | Philip E. Eggers | Surgical instruments having auto-regulating heater |
| CA2121194A1 (en) * | 1993-05-06 | 1994-11-07 | Corbett Stone | Bipolar electrosurgical instruments |
| US5484434A (en) * | 1993-12-06 | 1996-01-16 | New Dimensions In Medicine, Inc. | Electrosurgical scalpel |
| US5382247A (en) * | 1994-01-21 | 1995-01-17 | Valleylab Inc. | Technique for electrosurgical tips and method of manufacture and use |
| US5549604A (en) * | 1994-12-06 | 1996-08-27 | Conmed Corporation | Non-Stick electroconductive amorphous silica coating |
| US5611798A (en) * | 1995-03-02 | 1997-03-18 | Eggers; Philip E. | Resistively heated cutting and coagulating surgical instrument |
| US5848978A (en) * | 1995-11-14 | 1998-12-15 | Genx International, Inc. | Surgical biopsy device |
| GB9525652D0 (en) | 1995-12-15 | 1996-02-14 | Vanderstraeten E Bvba | Improved electrosurgical instrument and method for the production thereof |
| US6113594A (en) * | 1996-07-02 | 2000-09-05 | Ethicon, Inc. | Systems, methods and apparatus for performing resection/ablation in a conductive medium |
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| US29088A (en) * | 1860-07-10 | Hook eoe watch-chains | ||
| US30190A (en) * | 1860-10-02 | Grinding circular saws | ||
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| US2866068A (en) * | 1956-05-14 | 1958-12-23 | Bernstein Samuel | Electrically heated butcher knife |
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| DE2944730A1 (en) * | 1978-11-16 | 1980-05-29 | Corning Glass Works | SURGICAL INSTRUMENT |
| CA1161326A (en) * | 1979-09-10 | 1984-01-31 | Robert F. Shaw | Abherent surgical instrument and method |
| US4333467A (en) * | 1979-12-12 | 1982-06-08 | Corning Glass Works | Nonstick conductive coating |
-
1981
- 1981-06-30 US US06/278,955 patent/US4481057A/en not_active Expired - Lifetime
- 1981-10-09 CA CA000387733A patent/CA1178867A/en not_active Expired
- 1981-10-13 DE DE19813140671 patent/DE3140671A1/en active Granted
- 1981-10-16 AU AU76514/81A patent/AU552383B2/en not_active Ceased
- 1981-10-27 GB GB8132345A patent/GB2085765B/en not_active Expired
- 1981-10-27 FR FR8120148A patent/FR2492721B1/en not_active Expired
- 1981-10-28 NL NL8104881A patent/NL8104881A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| AU552383B2 (en) | 1986-05-29 |
| FR2492721B1 (en) | 1986-03-07 |
| FR2492721A1 (en) | 1982-04-30 |
| GB2085765A (en) | 1982-05-06 |
| DE3140671C2 (en) | 1987-09-10 |
| US4481057A (en) | 1984-11-06 |
| NL8104881A (en) | 1982-05-17 |
| DE3140671A1 (en) | 1982-06-16 |
| AU7651481A (en) | 1982-05-06 |
| GB2085765B (en) | 1984-12-19 |
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