Surgical cutting and stapling instruments with independent jaw control features
Surgical instruments and end effectors therefor are disclosed. In various implementations, the surgical instrument includes a surgical end effector that comprises a lower jaw and an upper jaw that are supported for movable travel toward and away from each other. The instrument may further include a firing member that is operably supported for selective operable travel within the surgical end effector. The instrument may also include a first jaw closure system that operably interfaces with the lower jaw and is configured to selectively move the lower jaw relative to the upper jaw. A second jaw closure system operably interfaces with the upper jaw and is configured to selectively move the upper jaw relative to the lower jaw. A firing system operably interfaces with the firing member and is configured to apply firing motions to the firing member to move the firing member within the end effector.
1. A surgical instrument, comprising:
a handle;
a motor configured to output a rotary motion;
a shaft extending from said handle;
an end effector extending from said shaft, wherein said end effector is configured to transition between an insertion diameter and an operating diameter, wherein said operating diameter is greater than said insertion diameter, and wherein said end effector comprises:
a first jaw movable between an unclamped position and a clamped position;
a second jaw;
an elongate channel configured to operably support a staple cartridge therein; and
an anvil; and
a firing member configured to perform a firing stroke in response to said rotary motion, wherein said firing member comprises:
a body portion comprising a hook portion;
a flexible extension arm extending from said body portion, wherein said flexible extension arm comprises:
a cutting portion;
a first laterally extending portion configured to cammingly engage said first jaw; and
a catch portion; and
a second laterally extending portion extending from said body portion and configured to cammingly engage said second jaw, wherein said flexible extension arm is configured to move relative to said body portion between a compressed state and an uncompressed state, wherein said catch portion abuts said hook portion when said flexible extension arm is in said uncompressed state, wherein said flexible extension arm is in said uncompressed state when said end effector is in said operating diameter, and wherein said flexible extension arm is in said compressed state when said end effector is in said insertion diameter.
2. The surgical instrument of claim 1 , further comprising said staple cartridge, wherein said staple cartridge comprises a plurality of staples removably stored therein.
3. A surgical instrument, comprising:
a housing;
a motor configured to output a rotary motion;
a shaft extending from said housing;
an end effector extending from said shaft, wherein said end effector comprises a first jaw and a second jaw, and wherein one of said first jaw and said second jaw is movable relative to the other of said first jaw and said second jaw between an open position and a closed position; and
a firing member configured to move through said end effector during a firing stroke in response to said rotary motion, wherein said firing member comprises:
a first portion comprising a first cam member, a catch portion, and a cutting portion, wherein said first cam member is configured to engage said first jaw of said end effector during said firing stroke;
a second portion comprising a second cam member configured to engage said second jaw of said end effector during said firing stroke, wherein said second portion further comprises a hook portion, wherein said firing member is configured to operate in a plurality of states, and wherein said plurality of states comprises:
an uncompressed state where the overall height of said firing member is defined by a first height; and
a compressed insertion state where the overall height of said firing member is defined by a second height which is less than said first height, wherein said first cam member and said cutting portion move together toward said second portion when said firing member transitions from said uncompressed state to said compressed insertion state, wherein said catch portion abuts said hook portion when said firing member is in said uncompressed state.
4. The surgical instrument of claim 3 , wherein said end effector further comprises a staple cartridge comprising a plurality of staples removably stored therein.