Patent ID: 11918212
Assignee: CILAG GMBH INTERNATIONAL
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 12:
13. A surgical stapling instrument, comprising:
a first shaft;
a motor operably interfacing with said first shaft, wherein said motor is configured to rotate said first shaft in a first rotary direction and a second rotary direction;
a surgical end effector, comprising:
an anvil movable between an open position and a closed position;
a second shaft rotatably supported in said surgical end effector, wherein said second shaft operably interfaces with said input first shaft such that rotation of said first shaft rotates said second shaft;
a first nut comprising a tissue cutting surface, wherein said first nut is in threaded engagement with said second shaft; and
a second nut in threaded engagement with said first shaft such that rotation of said first shaft in said first rotary direction causes said second nut to move said anvil from the open position to the closed position, wherein said second nut remains in threaded engagement with said first shaft while continued rotation of said first shaft in said first rotary direction causes said second shaft to drive said first nut distally through a firing stroke and said second nut to distally move from a clamped position corresponding to the closed position of the anvil to an ending position during the firing stroke.