A bipolar electrosurgical instrument has a pair of pivotable juxtaposed jaw members and a locking mechanism operatively associated with a second of the jaw members. The locking mechanism has a first position engaged with the second jaw member for preventing movement of the second jaw member between an...http://www.google.es/patents/US7799028?utm_source=gb-gplus-sharePatente US7799028 - Articulating bipolar electrosurgical instrument
