Patent ID: 7832408
Filing Date: 2010-11-16
Classification: A61B

Abstract:
1. A surgical instrument, comprising: a handle; a firing drive configured to selectively generate a rotary firing motion and a rotary retraction motion, wherein said firing drive comprises: an elongate shaft assembly coupled to said handle, said elongate shaft assembly comprising a rotatable drive shaft, wherein said drive shaft is operably engaged with said first ratchet wheel and said second ratchet wheel, wherein said first pawl is selectively engaged with said first ratchet wheel to transmit said rotary firing motion to said drive shaft and rotate said drive shaft, and wherein said second pawl is selectively engaged with said second ratchet wheel to transmit said rotary retraction motion to said drive shaft and rotate said drive shaft; and an end effector coupled to said elongate shaft assembly, said end effector comprising: wherein said cutting member is operably engaged with said elongate shaft assembly and is responsive to said rotary firing and said rotary retraction motions from said firing drive.