Patent ID: 8505799

Claim:
A powered endoscopic surgical apparatus, comprising: a handle including a housing, a power source supported in the housing; an endoscopic portion extending distally from the housing of the handle; a fastening assembly coupled to a distal end of the endoscopic portion, the fastening assembly including a pair of jaws defining a stapling mechanism, at least one of the jaws being movable with respect to the other jaw; a firing member extending between the handle and the fastening assembly; a drive source proximal of the endoscopic portion, the drive source including a motor powered by the power source and connected to the firing member; and a gear assembly engaged with a drive shaft of the motor, the gear assembly being disposed within the housing, the gear assembly including: a gear rack provided on the firing member; and a main gear operatively connected with the gear rack of the firing member, the motor being adapted and configured to spin the main gear such that rotary motion of the main gear moves the firing member linearly in an axial direction such that a distal end of the firing member engages and actuates the stapling mechanism in the fastening assembly.