Surgical stapling instrument incorporating a multistroke firing mechanism having a rotary transmission
First Claim
Patent Images
1. A surgical instrument, comprising:
- an end effector operably configured to respond to a firing motion;
a shaft attached to the end effector and including an elongate firing member coupled to the end effector for movement to longitudinally transmit the firing motion; and
a handle proximally attached to the shaft, comprising;
a cam disk including a plurality of cam lobes about at least a portion of a circumference,a firing actuator repeatably moveable in a firing direction and a return direction;
a wedge coupled to the firing actuator and operably configured to sequentially engage a respective one of the plurality of cam lobes of the cam disk during each movement of the firing actuator in the firing direction;
a rack connected to the firing member of the shaft and coupled by gear engagement with the cam disk to transmit an intermittent rotation of the cam disk as the longitudinal firing motion.
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Accused Products
Abstract
A surgical stapling and severing instrument particularly suited to endoscopic procedures incorporates a handle that produces separate closing and firing motions to actuate an end effector. In particular, the handle produces multiple firing strokes in order to reduce the required amount of force required to fire (i.e., staple and sever) the end effector.
1133 Citations
15 Claims
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1. A surgical instrument, comprising:
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an end effector operably configured to respond to a firing motion; a shaft attached to the end effector and including an elongate firing member coupled to the end effector for movement to longitudinally transmit the firing motion; and a handle proximally attached to the shaft, comprising; a cam disk including a plurality of cam lobes about at least a portion of a circumference, a firing actuator repeatably moveable in a firing direction and a return direction; a wedge coupled to the firing actuator and operably configured to sequentially engage a respective one of the plurality of cam lobes of the cam disk during each movement of the firing actuator in the firing direction; a rack connected to the firing member of the shaft and coupled by gear engagement with the cam disk to transmit an intermittent rotation of the cam disk as the longitudinal firing motion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A surgical instrument, comprising:
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an end effector operably configured to respond to a firing motion; a shaft attached to the end effector and including an elongate firing member coupled to the end effector for movement to longitudinally transmit the firing motion; and a handle proximally attached to the shaft, comprising; a firing actuator repeatably moveable in a firing direction and a return direction, a rack connected to the firing member of the shaft, and a means for rotationally coupling repeated firing direction motion from the firing actuator into the rack and maintaining a current position of the rack during return direction motion of the firing actuator. - View Dependent Claims (14, 15)
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Specification