End effector closure system for a surgical stapling instrument

• US 20080314961A1
• Filed: 06/22/2007
• Published: 12/25/2008
• Est. Priority Date: 06/22/2007
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson)
• Original Assignee: Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Inventors: Boudreaux, Chad P., Balek, Stephen J.
• Granted Patent: US 7,597,229 B2
• Time in Patent Office: Days
• US Class Current: 227/180.1
• CPC Class Codes: A61B 17/072 for applying a row of staples in a single action , e.g. the staples being applied simultaneously

Abstract

A surgical instrument including a closure system configured to move an anvil of an end effector between an open position, a partially closed position, and a closed position. The surgical instrument can further include a lock member configured to selectively engage and lock the closure system when the anvil is positioned in at least one of its partially closed and closed positions. In at least one embodiment, the surgical instrument can include a trigger configured to pivot the anvil, the lock member can include a follower portion, and the closure drive can include a lock spring configured to bias the follower portion against a cam surface of the trigger such that the follower portion can engage a notch in the cam surface when the anvil is pivoted into its partially closed position, or closed position, and prevent the anvil from being pivoted into its open position.

Claims

1. A surgical instrument, comprising:

a firing drive configured to generate a firing motion;

an end effector, comprising;

a channel configured to receive a staple cartridge;

an anvil movably coupled to said channel; and

a cutting member operably supported within said channel, wherein said cutting member is operably engaged with said firing drive and is responsive to said firing motion; and

a closure drive configured to generate a closing motion, wherein said anvil is operably engaged with said closure drive and is movably responsive to said closing motion, and wherein said closure drive includes;

a trigger, wherein said anvil is movable between an open position and a partially closed position when said trigger is moved between a first position and a second position, and wherein said anvil is movable between said partially closed position and a closed position when said trigger is moved between said second position and a third position; and

a lock member configured to selectively engage said closure drive and lock said anvil in at least one of said partially closed position and said closed position.

2. The surgical instrument of claim 1, wherein said trigger includes a cam portion having a first notch, wherein said lock member includes a follower portion, wherein said closure drive further includes a lock spring configured to bias said follower portion against said cam portion, wherein said cam portion is configured to slide relative to said follower portion as said trigger is moved between said first position and said second position, and wherein said follower portion is configured to engage said first notch when said anvil is moved into said partially closed position and to prevent said trigger from moving from said second position into said first position.

3. The surgical instrument of claim 2, wherein said lock member is pivotably mounted relative to said cam portion, and wherein said lock member is configured to be pivoted away from said cam portion to disengage said follower portion from said first notch and allow said trigger to be moved from said second position into said first position.

4. The surgical instrument of claim 3, further comprising a trigger return spring operably engaged with said trigger, wherein said trigger return spring is configured to move said trigger from said second position into said first position after said follower portion has been disengaged from said first notch.

5. The surgical instrument of claim 2, wherein said cam portion further includes a second notch, wherein said cam portion is configured to slide relative to said follower portion as said trigger is moved between said second position and said third position, and wherein said follower portion is configured to engage said second notch when said anvil is moved into said closed position and to prevent said trigger from moving from said third position into said second position.

6. The surgical instrument of claim 1, wherein said lock member is configured to selectively prevent said anvil from returning to said open position after being moved into said partially closed position.

7. The surgical instrument of claim 6, further comprising a lock release configured to disengage said lock member from said closure drive such that said anvil can be moved from said partially closed position into said open position.

8. The surgical instrument of claim 6, wherein said lock member is configured to selectively prevent said anvil from returning to said partially closed position after being moved into said closed position.

9. The surgical instrument of claim 1, wherein said lock member is configured to prevent said anvil from returning to said open position after being moved into said partially closed position without first being moved into said closed position.

10. A method for processing an instrument for surgery, the method comprising:

obtaining the surgical instrument of claim 1;

sterilizing the surgical instrument; and

storing the surgical instrument in a sterile container.

12. The surgical instrument of claim 11, wherein said trigger includes a cam portion having a first notch, wherein said lock member includes a follower portion, wherein said closure drive further includes a lock spring configured to bias said follower portion against said cam portion, wherein said cam portion is configured to slide relative to said follower portion as said trigger is moved between said first position and said second position, and wherein said follower portion is configured to engage said first notch and prevent said trigger from moving from said second position into said first position.

13. The surgical instrument of claim 12, wherein said lock member is pivotably mounted relative to said cam portion, and wherein said lock member is configured to be pivoted away from said cam portion to disengage said follower portion from said first notch and allow said trigger to be moved from said second position into said first position.

14. The surgical instrument of claim 13, further comprising a trigger return spring operably engaged with said trigger, wherein said trigger return spring is configured to move said trigger from said second position into said first position after said follower portion has been disengaged from said first notch.

15. The surgical instrument of claim 12, wherein said cam portion further includes a second notch, wherein said cam portion is configured to slide relative to said follower portion as said trigger is moved between said second position and said third position, and wherein said follower portion is configured to engage said second notch and prevent said trigger from moving from said third position into said second position.

11. A surgical instrument, comprising:

a firing drive configured to generate a firing motion;

an end effector operably engaged with said firing drive, said end effector comprising;

a channel configured to receive a staple cartridge; and

an anvil movably coupled to said channel; and

a closure drive configured to generate a closing motion, wherein said anvil is operably engaged with said closure drive and is movably responsive to said closing motion, and wherein said closure drive includes;

a trigger, wherein said trigger is movable between a first position and a second position, and wherein said trigger is movable between said second position and a third position; and

a lock member, wherein said lock member is configured to engage said trigger and selectively lock said trigger in at least one of said second position and said third position.

16. A method for processing an instrument for surgery, the method comprising:

obtaining the surgical instrument of claim 11;

sterilizing the surgical instrument; and

storing the surgical instrument in a sterile container.

17. A surgical instrument, comprising:

a firing drive configured to generate a firing motion;

an end effector operably engaged with said firing drive, said end effector comprising;

a channel configured to receive a staple cartridge; and

an anvil movably coupled to said channel;

a closure drive configured to generate a closing motion, wherein said anvil is operably engaged with said closure drive and is movably responsive to said closing motion, and wherein said closure drive includes;

a trigger, wherein said trigger is movable between a first position and a second position, and wherein said trigger is movable between said second position and a third position; and

a lock member, wherein said lock member is configured to selectively prevent said trigger from returning to said first position after being moved into said second position.

18. The surgical instrument of claim 17, wherein said trigger includes a cam portion having a first notch, wherein said lock member includes a follower portion, wherein said closure drive further includes a lock spring configured to bias said follower portion against said cam portion, wherein said cam portion is configured to slide relative to said follower portion as said trigger is moved between said first position and said second position, and wherein said follower portion is configured to engage said first notch and prevent said trigger from moving from said second position into said first position.

19. The surgical instrument of claim 18, wherein said lock member is pivotably mounted relative to said cam portion, and wherein said lock member is configured to be pivoted away from said cam portion to disengage said follower portion from said first notch and allow said trigger to be moved from said second position into said first position.

20. The surgical instrument of claim 19, further comprising a trigger return spring operably engaged with said trigger, wherein said trigger return spring is configured to move said trigger from said second position into said first position after said follower portion has been disengaged from said first notch.

21. The surgical instrument of claim 19, wherein said cam portion further includes a second notch, wherein said cam portion is configured to slide relative to said follower portion as said trigger is moved between said second position and said third position, and wherein said follower portion is configured to engage said second notch and prevent said trigger from moving from said third position into said second position.

22. A method for processing an instrument for surgery, the method comprising:

obtaining the surgical instrument of claim 17;

sterilizing the surgical instrument; and

storing the surgical instrument in a sterile container.