A surgical instrument including a firing drive configured to selectively advance a firing member and/or cutting member relative to an end effector and, in addition, a reversing drive configured to selectively retract the firing member and/or cutting member relative to the end effector. The firing drive...http://www.google.de/patents/US7658311?utm_source=gb-gplus-sharePatent US7658311 - Surgical stapling instrument with a geared return mechanism
