Patent ID: 8292155

Claim:
A surgical cutting and fastening instrument comprising: an end effector comprising: an elongate channel; a movable cutting instrument for cutting an object positioned in the end effector, and a clamping member pivotably connected to the elongate channel and wherein said surgical cutting and fastening instrument further comprises: a main drive shaft assembly connected to the end effector; a gear drive train connected to the main drive shaft assembly; a main motor for actuating the gear drive train; a firing trigger for actuating the main motor; a tactile position feedback system for applying force to the firing trigger such that the position of the firing trigger is related to the position of the cutting instrument in the end effector; a closure trigger separate from the firing trigger, wherein retraction of the closure trigger causes the end effector to clamp the object positioned in the end effector; and a mechanical closure system for closing the end effector when the closure trigger is retracted, said mechanical closure system comprising: a yoke connected to the closure trigger; a closure bracket connected to the yoke; and a closure tube disposed in the closure bracket and connected to the clamping member, wherein retraction of the closure trigger causes the closure tube to move longitudinally such that the clamping member pivots to a clamped position.