Patent ID: 7832408

Claim:
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: a firing trigger operably coupled to said handle; a first ratchet assembly, comprising: a first ratchet wheel having a plurality of ratchet teeth; and a first pawl pivotably connected to said firing trigger, wherein said first pawl is selectively engageable with said ratchet teeth of said first ratchet wheel; and a second ratchet assembly, comprising: a second ratchet wheel having a plurality of ratchet teeth; and a second pawl pivotably connected to said firing trigger, wherein said second pawl is selectively engageable with said ratchet teeth of said second ratchet wheel; 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: an elongate channel configured to operably receive a staple cartridge therein; an anvil movably coupled to said elongate channel; and a cutting member operably supported within said elongate channel, 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.