Patent ID: 7597229

Claim:
A surgical instrument, comprising: a firing drive configured to generate a firing motion; an end effector, comprising: a channel configured to receive a staple cartridge; an anvil movably coupled to said channel; and a cutting member operably supported within said channel, wherein said cutting member is operably engaged with said firing drive and is responsive to said firing motion; a closure drive configured to generate a closing motion, wherein said anvil is operably engaged with said closure drive and is movably responsive to said closing motion, and wherein said closure drive includes: a trigger, wherein said anvil is movable between an open position and a partially closed position when said trigger is moved between a first position and a second position, and wherein said anvil is movable between said partially closed position and a closed position when said trigger is moved between said second position and a third position; and a lock member configured to selectively engage said closure drive and lock said anvil in said partially closed position and said closed position.