A surgical apparatus is disclosed. An actuation mechanism is operable from a proximal portion of the surgical apparatus and a tool assembly is pivotally positioned on a distal portion of the surgical apparatus. The tool assembly is movable between a first position in which the tool assembly is substantially...http://www.google.es/patents/US20090065549?utm_source=gb-gplus-sharePatente US20090065549 - Articulating joint for surgical instruments
