A surgical stapling and severing instrument particularly suited to endoscopic procedures incorporates a handle that produces separate closing and firing motions to actuate an end effector. In particular, the handle produces multiple firing strokes in order to reduce the required amount of force required...http://www.google.com/patents/US20060000867?utm_source=gb-gplus-sharePatent US20060000867 - Surgical stapling instrument incorporating an uneven multistroke firing mechanism having a rotary transmission
