A surgical stapling and severing instrument particularly suited to endoscopic use includes a proximal portion that is manipulated external to a patient to position an attached elongate shaft and end effector to a desired surgical site inside of the patient. An articulation joint pivotally attaches the...http://www.google.co.uk/patents/US20060229665?utm_source=gb-gplus-sharePatent US20060229665 - Surgical instrument with articulating shaft with single pivot closure and double pivot frame ground
