SURGICAL END EFFECTORS WITH DUAL CAM ACTUATED JAW CLOSING FEATURES

• US 20160367248A1
• Filed: 06/18/2015
• Published: 12/22/2016
• Est. Priority Date: 06/18/2015
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson)
• Original Assignee: Ethicon Endo-Surgery LLC (Johnson & Johnson)
• Inventors: Baxter, Chester O. III, Swayze, Jeffrey S., Dunki-Jacobs, Adam R.
• Granted Patent: US 10,052,102 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 17/068 Surgical staplers , e.g. containing multiple staples or clampsstaplers containing only one staple A61B17/10; magazines or containers for staples A61B17/105; for performing anastomosis A61B17/115; staplers in general B25C5/00
• CPC Class Codes: A61B 17/072 for applying a row of staples in a single action , e.g. the staples being applied simultaneously
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 17/105 Wound clamp magazines for packaging sharps A61B50/3001
• CPC Class Codes: A61B 2017/00323 Cables or rods
• CPC Class Codes: A61B 2017/00327 with actuating members moving in opposite directions
• 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 2017/00734 battery operated
• CPC Class Codes: A61B 2017/07214 Stapler heads
• 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 2017/2902 characterized by features of the actuating rod
• CPC Class Codes: A61B 2017/2927 the angular position of the head being adjustable with respect to the shaft
• CPC Class Codes: A61B 2017/2929 with a head rotatable about the longitudinal axis of 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 2017/2939 Details of linkages or pivot points
• CPC Class Codes: A61B 2017/2943 Toothed members, e.g. rack and pinion
• CPC Class Codes: A61B 2017/2946 : Locking means
• CPC Class Codes: A61B 2090/0818 : Redundant systems, e.g. using two independent measuring systems and comparing the signals
• CPC Class Codes: A61B 34/30 : Surgical robots
• CPC Class Codes: A61B 34/71 : Manipulators operated by drive cable mechanisms
• CPC Class Codes: A61B 90/30 : Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure

Abstract

A surgical instrument comprising an elongate shaft assembly that defines a shaft axis. An end effector mounting assembly may be movably coupled to the elongate shaft assembly for selective articulation about an articulation axis that is transverse to the shaft axis. First and second jaws may be movably coupled to the end effector mounting assembly such that the first and second jaws are each movable relative to each other and the shaft axis about a common pivot axis between an open position and closed positions. The first and second jaws may close at different closure rates upon the simultaneous application of closure motions thereto.

Claims

1. A surgical instrument, comprising:

an elongate shaft assembly defining a shaft axis;

an end effector mounting assembly movably coupled to said elongate shaft assembly for selective articulation about an articulation axis that is transverse to said shaft axis;

first and second jaws movably coupled to said end effector mounting assembly such that said first and second jaws are each movable relative to each other and said shaft axis about a common pivot axis between an open position and closed positions, said first jaw comprising a first point and said second jaw comprising a second point wherein said first and second points lie along a common axis that is perpendicular to said shaft axis and wherein said first point is a first distance from said shaft axis when said first jaw is in said open position and wherein said second point is a second distance from said shaft axis when said second jaw is in said open position and wherein said second distance is different from said first distance;

means for biasing said first and second jaws away from each other to said open position; and

means for applying closure motions to said first and second jaws to move said first and second jaws toward each other to said closed positions.

2. The surgical instrument of claim 1, wherein one of said first and second jaws comprises an elongate channel that is configured to operably support a surgical staple cartridge therein and wherein the other one of said first and second jaws comprises an anvil.

3. The surgical instrument of claim 1, wherein said first jaw comprises a surgical staple cartridge and wherein said second jaw comprises an anvil and wherein said second distance is greater than said first distance.

4. The surgical instrument of claim 2, further comprising a firing member that is supported for axial travel between said first and second jaws when said first and second jaws are in one of said closed positions.

5. The surgical instrument of claim 1, wherein said end effector mounting assembly comprises a pair of lateral sides, each said lateral side comprising a laterally protruding trunnion pin defining said pivot axis and wherein each of said first and second jaws are pivotally supported on each of said laterally protruding trunnion pins.

6. The surgical instrument of claim 1, wherein said means for biasing comprises a spring located between said first and second jaws.

7. The surgical instrument of claim 1, wherein said means for applying closure motions comprises an axially movable end effector closure sleeve configured to simultaneously engage portions of said first and second jaws when said end effector closure sleeve is axially moved in a first direction.

8. The surgical instrument of claim 1, further comprising an axially movable firing member supported for axial travel between said first and second jaws when said first and second jaws are in one of said closed positions.

9. The surgical instrument of claim 8, wherein said firing member comprises a tissue cutting surface.

11. The surgical instrument of claim 9, further comprising an axially movable firing member supported for axial travel between said first and second jaws when said first and second jaws are in one of said closed positions.

10. A surgical instrument, comprising:

an elongate shaft assembly defining a shaft axis;

an end effector mounting assembly movably coupled to said elongate shaft assembly for selective articulation about an articulation axis that is transverse to said shaft axis;

first and second jaws movably coupled to said end effector mounting assembly such that said first and second jaws are each movable relative to each other and said shaft axis between an open position and closed positions such that upon application of a closing motion to said first and second jaws causes one of said first and second jaws to move to one of said closed positions at a closure rate that differs from another closure rate at which the other of said first and second jaws moves to said one of said closed positions; and

means for selectively applying said closing motion to said first and second jaws and an opening motion to said first and second jaws to selectively move said first and second jaws from said closed positions to said open position.

12. The surgical instrument of claim 10, further comprising:

a first cam slot on said end effector mounting assembly, said first cam slot defining a first closure wedge portion and a first opening wedge portion; and

a second cam slot on said end effector mounting assembly, said second cam slot defining a second closure wedge portion and a second opening wedge portion, and wherein said first jaw comprises a pair of first opening members and a pair of first closing members wherein one of said first opening members and one of said first closing members are movably received within said first cam slot and wherein another one of said first opening members and another one of said first closing members are received within said second cam slot and wherein said second jaw comprises a pair of second opening members and a pair of second closing members wherein one of said second opening members and one of said second closing members are movably received in said first cam slot and wherein another one of said second opening members and another one of said second closing members are movably received within said second cam slot and wherein said means for selectively applying is configured to move said first and second jaws in a first direction so as to cause said one of said first closing members and said one of said second closing members to movably enter said first closure wedge portion and said another one of said first closing members and said another one of said second closing members to movably enter said second closure wedge portion to thereby cause said first and second jaws to move toward each other to one of said closed positions, said means for selectively applying being further configured to move said first and second jaws in a second direction so as to cause said one of said first opening members and said one of said second opening members to move into said first opening wedge portion and said another one of said first opening members and said another one of said second opening members to move into said second opening wedge portion to thereby cause said first and second jaws to move away from each other to said open position.

13. The surgical instrument of claim 12, wherein said first cam slot is formed in a first cam plate that is coupled to said end effector mounting assembly and wherein said second cam slot is formed in a second cam plate that is coupled to said end effector mounting assembly.

14. The surgical instrument of claim 10, wherein said means for selectively applying comprises an end effector closure sleeve that is axially movable in response to applications of said closing and opening motions thereto, said end effector closure sleeve comprising:

a first opening tab corresponding to said one of said first opening members and said one of said second opening members for operable contact therewith when said end effector closure sleeve is moved in said second direction; and

a second opening tab corresponding to said another one of said first opening members and said another one of said second opening members for operable contact therewith when said end effector closure sleeve is moved in said second direction.

15. The surgical instrument of claim 10, wherein one of said first and second jaws comprises an elongate channel that is configured to operably support a surgical staple cartridge therein and wherein the other one of said first and second jaws comprises an anvil.

16. The surgical instrument of claim 15, further comprising a firing member that is supported for axial travel between said first and second jaws when said first and second jaws are in one of said closed positions.

17. A surgical instrument, comprising:

a first jaw and a second jaw that are pivotally supported relative to each other for selective pivotal travel between an open position and closed positions; and

a closure member that is axially movable in response to applications of closing and opening motions thereto, said closure member including at least two inwardly extending opening tabs that are configured to operably engage corresponding portions of at least one of said first and second jaws upon application of said opening motions to said closure member to move at least one of said first and second jaws to said open position.

18. The surgical instrument of claim 17, wherein at least one of said at least two inwardly extending opening tabs is integrally formed in said closure member.

19. The surgical instrument of claim 17, wherein each of said at least two inwardly extending opening tabs are removably affixed to said closure member.

20. The surgical instrument of claim 17, wherein one of said first and second jaws comprises an elongate channel that is configured to operably support a surgical staple cartridge therein and wherein the other one of said first and second jaws comprises an anvil.