Surgical stapling and cutting apparatus, clamp mechanisms, systems and methods
A surgical stapling device is configured for use in open and/or laparoscopic surgical procedures. The device includes a handle assembly, a shaft assembly coupled to the handle assembly, and an end-effector coupled to the shaft assembly. The end-effector comprises of a jaw assembly configured to clamp, staple, and/or cut a target tissue. The handle assembly comprises of a trigger element that can activate a drive assembly to advance a clamp drive assembly to clamp the aforementioned target tissue. The clamp drive assembly comprises of a clamp slide member to either advance the clamp drive assembly in a first direction or retreat the clamp drive assembly in a second direction. The clamp drive assembly is movably coupled to a clamp driver member. Movement of the clamp driver member operates clamping operations of a jaw assembly of the surgical stapling device.
1. A surgical stapling device, comprising:
a handle assembly;
a shaft assembly coupled to said handle assembly; and
an end-effector coupled to said shaft assembly, said end-effector comprising a jaw assembly configured to perform clamping operations,
wherein said handle assembly comprises a trigger member to activate a clamp drive assembly to drive the clamp assembly to cause said jaw assembly to perform clamping operations,
wherein said clamp assembly comprises:
a clamp limit member;
a clamp slide member coupled to said clamp limit member and actuable to either advance in a first direction or retract in a second direction, and
wherein said drive assembly comprises:
a clamp driver member movably coupled to said clamp limit member,
wherein proximal movement of said clamp driver member causes said jaw assembly to clamp and wherein distal movement of said clamp driver member causes said jaw assembly to un-clamp, and
wherein upon application of a force to said clamp slide member above a limit associated with said claim limit member, said clamp slide member decouples from said clamp driver member.
2. The surgical stapling device of claim 1 , further comprising:
a clamp lock member to lock said clamp slide member in a first clamp lock pocket feature and a second clamp lock pocket feature to lock said clamp driver member to place said jaw assembly in a clamp lock mode.
3. The surgical stapling device of claim 2 , wherein when said clamp assembly moves or translates independently of said clamp driver, said clamp driver is prevented to place said jaw assembly in a clamp lock mode.
4. The surgical stapling device of claim 1 , further comprising:
a clamp lock ramp feature on said clamp lock member to provide a positive resistance to said clamp slide member prior to locking said clamp slide member in said first clamp lock pocket feature to place said jaw assembly in said clamp lock mode.
5. The surgical stapling device of claim 1 , further comprising:
a mode switch member to selectively place the surgical stapling device in a clamping mode to operate said clamp drive assembly.
6. The surgical stapling device of claim 2 , further comprising:
a reset switch member configured to activate a swing arm member to reset said clamp lock member to release said clamp slide member from said first clamp lock pocket feature and release said clamp driver member from said second clamp lock pocket feature to reset said jaw assembly from said clamp lock mode.
7. The surgical stapling device of claim 6 , wherein said swing arm member includes an unclamp tab element to engage and reset said clamp lock member.
8. The surgical stapling device of claim 1 , wherein said clamp limit member is a spring.
9. The surgical stapling device of claim 1 , wherein said clamp limit member translates force from said clamp slide member to said clamp driver member.
10. The surgical stapling device of claim 1 , wherein said clamp driver member comprises a clamp limit clip member, said clamp limit clip member comprising a clamp limit clip tab; further comprising a clamp lock member selectively engageable by said clamp limit clip tab.
11. The surgical stapling device of claim 10 , wherein said clamp lock member further comprises a clamp lock pocket feature defined in an upper surface thereof, and wherein said clamp limit clip tab sits in said clamp lock pocket feature when said jaw assembly is clamped.
12. The surgical stapling device of claim 11 , wherein when said clamp limit clip tab sits in said clamp lock pocket feature, said clamp limit clip tab holds said clamp slide member substantially stationary.
13. The surgical stapling device of claim 10 , wherein said clamp lock member further comprises an additional clamp lock pocket feature; wherein said clamp slide member further comprises a slide pin extending therefrom; and wherein said slide pin sits in said additional clamp lock pocket feature when said jaw assembly is clamped.
14. The surgical stapling device of claim 1 , further comprising a clamp strip extending through said shaft assembly; wherein said clamp strip is coupled to said clamp driver member.
15. The surgical stapling device of claim 1 , further comprising a clamp cable member connected to said clamp slide member; and wherein said handle assembly comprises a trigger; wherein actuation of said trigger causes said clamp cable member to pull said clamp slide member proximally.
16. The surgical stapling device of claim 1 , wherein said claim limit member is a spring, and wherein said limit is determined by said spring.