#$%^&*AU2015204308A120150806.pdf#####POWERED SURGICAL INSTRUMENT ABSTRACT A surgical instrument (100) including a housing (110), an endoscopic portion (140), a drive gear (200), a drive motor (210), a shift motor (220) and an end effector (160) is disclosed. The endoscopic portion (140) extends distally from the housing (110) and defines a longitudinal axis. The drive gear (200) is disposed at least partially within the housing (110) and is rotatable about a drive gear axis which extends therethrough. The drive gear (200) is selectively movable along the drive gear axis. The drive motor (210) is disposed in mechanical co-operation with the drive gear (200) and is configured to rotate the drive gear (200). The shift motor (220) is disposed in mechanical cooperation with the drive gear (200) and is configured to move the drive gear (200) along the drive gear axis. The end effector (160) is disposed adjacent a distal portion of the endoscopic portion (140).
