FIRING MEMBER PIN CONFIGURATIONS

• US 20180168607A1
• Filed: 12/21/2016
• Published: 06/21/2018
• Est. Priority Date: 12/21/2016
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson)
• Original Assignee: Ethicon Endo-Surgery LLC (Johnson & Johnson)
• Inventors: Shelton, IV, Frederick E., Harris, Jason L., Bakos, Gregory J.
• Granted Patent: US 10,856,868 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 17/0644 penetrating the tissue, deformable to closed position
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 2017/00017 Electrical control of surgical instruments
• CPC Class Codes: A61B 2017/00398 using powered actuators, e.g. stepper motors, solenoids
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603
• CPC Class Codes: A61B 2017/00464 for use with different instruments with hole for different instruments A61B2017/22072
• CPC Class Codes: A61B 2017/00473 Distal part, e.g. tip or head A61B2017/00464 takes precedence
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/00845 of moving parts with respect to each other
• CPC Class Codes: A61B 2017/07228 Arrangement of the staples
• CPC Class Codes: A61B 2017/07235 containing different staples, e.g. staples of different shapes, sizes or materials
• CPC Class Codes: A61B 2017/07242 achieving different staple heights during the same shot, e.g. using an anvil anvil having different heights or staples of different sizes
• CPC Class Codes: A61B 2017/0725 with settable gap between anvil and cartridge, e.g. for different staple heights at different shots
• CPC Class Codes: A61B 2017/07257 characterised by its anvil
• CPC Class Codes: A61B 2017/07264 characterised by its staple forming cavities, e.g. geometry or material
• CPC Class Codes: A61B 2017/07271 characterised by its cartridge
• CPC Class Codes: A61B 2017/07278 characterised by its sled or its staple holder
• CPC Class Codes: A61B 2017/07285 characterised by its cutter
• CPC Class Codes: A61B 2017/2927 the angular position of the head being adjustable with respect to the shaft
• CPC Class Codes: A61B 2017/2933 : camming or guiding means
• CPC Class Codes: A61B 2017/2936 : Pins in guiding slots
• CPC Class Codes: A61B 2090/0814 : Preventing re-use
• CPC Class Codes: A61B 34/30 : Surgical robots

Abstract

A surgical instrument comprising a first jaw, a second jaw, and a firing member is disclosed. The firing member comprises one or more cams configured to position the first jaw relative to the second jaw. The cams are configured to reduce the strain experienced by the cams, the firing member, and the first and second jaws.

Claims

1. A surgical instrument, comprising:

a firing member, comprising;

a longitudinal drive portion; and

a cam extending laterally from said longitudinal drive portion; and

an anvil jaw, comprising;

longitudinal rows of forming pockets; and

a longitudinal anvil slot, comprising;

a center portion configured to receive said longitudinal drive portion of said firing member; and

a lateral opening extending laterally from said center portion configured to receive said cam, wherein said lateral opening comprises a closed lateral end, and wherein said closed lateral end is entirely curved.

2. The surgical instrument of claim 1, wherein said closed lateral end is defined by a single radius of curvature.

3. The surgical instrument of claim 2, wherein said cam comprises a lateral cam end, and wherein said lateral cam end is defined by a radius or curvature which matches said single radius of curvature.

4. The surgical instrument of claim 2, wherein said cam comprises a lateral cam end, and wherein said lateral cam end is defined by a radius of curvature which is smaller than said single radius of curvature.

5. The surgical instrument of claim 1, wherein said closed lateral end is defined by more than one radius of curvature.

6. The surgical instrument of claim 1, wherein said firing member further comprises a second cam extending laterally from said longitudinal drive portion, wherein said longitudinal anvil slot comprises a second lateral opening extending laterally from said center portion configured to receive said second cam, wherein said second lateral opening comprises a second closed lateral end, and wherein said second lateral end is entirely curved.

7. The surgical instrument of claim 1, further comprising a cartridge jaw including:

a cartridge body;

a longitudinal cartridge slot configured to receive said longitudinal drive portion of said firing member;

longitudinal rows of staple cavities registerable with said forming pockets; and

staples removably stored in said longitudinal rows of staple cavities, wherein said firing member is movable through said cartridge body to eject said staples from said longitudinal rows of staple cavities.

8. The surgical instrument of claim 7, wherein said anvil jaw is rotatable relative to said cartridge jaw.

9. The surgical instrument of claim 7, wherein said cartridge jaw is rotatable relative to said anvil jaw.

10. The surgical instrument of claim 7, wherein at least a portion of said cartridge jaw is replaceable.

11. The surgical instrument of claim 1, wherein said closed lateral end comprises a circular profile.

12. The surgical instrument of claim 1, wherein said longitudinal drive portion comprises a first lateral width, wherein said cam comprises a second lateral width, and wherein second lateral width is less than ¾

of said first lateral width.

13. The surgical instrument of claim 1, wherein said longitudinal drive portion comprises a first lateral width, wherein said cam comprises a second lateral width, and wherein second lateral width is less than ⅔

of said first lateral width.

14. The surgical instrument of claim 1, wherein said longitudinal drive portion comprises a first lateral width, wherein said cam comprises a second lateral width, and wherein second lateral width is less than ½

of said first lateral width.

15. A surgical instrument, comprising:

a firing member, comprising;

a longitudinal drive portion; and

a cam extending laterally from said longitudinal drive portion; and

an anvil jaw, comprising;

longitudinal rows of forming pockets; and

a longitudinal anvil slot, comprising;

a center portion configured to receive said longitudinal drive portion of said firing member; and

a lateral opening extending laterally from said center portion configured to receive said cam, wherein said lateral opening comprises a closed lateral end, and wherein said closed lateral end is circular.

16. A surgical instrument, comprising:

a firing member, comprising;

a longitudinal drive portion; and

a cam extending laterally from said longitudinal drive portion, wherein said cam comprises an arcuate lateral cam end; and

an anvil jaw, comprising;

longitudinal rows of forming pockets; and

a longitudinal anvil slot, comprising;

a center portion configured to receive said longitudinal drive portion of said firing member; and

a lateral slot extending laterally from said center portion configured to receive said cam, wherein said lateral slot comprises an arcuate slot end, and wherein said arcuate lateral cam end is closely received in said arcuate lateral slot end.

17. A surgical instrument, comprising:

a firing system, comprising;

a cutting member;

a bottom cam extending laterally from said cutting member; and

a top cam, comprising;

a base attached to said cutting member;

a free end; and

a tapered cross-section between said base and said free end;

a cartridge jaw, wherein said bottom cam is configured to engage said cartridge jaw during a firing stroke of said firing system; and

an anvil jaw, comprising;

longitudinal rows of forming pockets; and

a longitudinal anvil slot, comprising;

a center portion configured to receive said cutting member; and

a lateral opening extending laterally from said center portion configured to receive said top cam during said firing stroke.

18. The surgical instrument of claim 17, wherein said anvil jaw is movable relative to said cartridge jaw between an open position and a closed position.

19. The surgical instrument of claim 18, wherein said top cam is configured to engage said anvil jaw and move said anvil jaw toward said closed position.

20. The surgical instrument of claim 18, wherein said top cam is configured to engage said anvil jaw and hold said anvil jaw in said closed position.

21. The surgical instrument of claim 17, wherein said cartridge jaw is movable relative to said anvil jaw between an open position and a closed position.

22. The surgical instrument of claim 21, wherein said bottom cam is configured to engage said cartridge jaw and move said cartridge jaw toward said closed position.

23. The surgical instrument of claim 21, wherein said bottom cam is configured to engage said cartridge jaw and hold said cartridge jaw in said closed position.

24. The surgical instrument of claim 17, wherein said cartridge jaw comprises a replaceable staple cartridge comprising staples removably stored therein.

25. The surgical instrument of claim 24, wherein said staple cartridge further comprises a sled including at least one inclined surface configured to eject said staples from said staple cartridge.

26. The surgical instrument of claim 17, wherein said cartridge jaw further comprises a sled configured to eject said staples from said staple cartridge.

27. The surgical instrument of claim 17, wherein said tapered cross-section comprises a linear taper.

28. The surgical instrument of claim 17, wherein said tapered cross-section comprises a non-linear taper.

29. A surgical instrument, comprising:

a firing member, comprising;

a bottom cam extending laterally from said firing member; and

a top cam, comprising;

a base attached to said firing member;

a free end; and

a sloped portion extending between said base and said free end;

a cartridge jaw, wherein said bottom cam is configured to engage said cartridge jaw during a firing stroke of said firing member; and

an anvil jaw, comprising;

longitudinal rows of forming pockets; and

a longitudinal anvil slot, comprising;

a vertical portion configured to receive said firing member; and

a lateral opening extending laterally from said vertical portion configured to receive said top cam during said firing stroke.