Patent ID: 8286847

Claim:
A surgical apparatus for laparoscopic or endoscopic procedures comprising: a frame; an endoscopic portion defining a longitudinal axis and extending distally from the frame; a tool assembly supported on the distal end of the endoscopic portion, the tool assembly including a first jaw pivotably supported in relation to a second jaw, wherein the first jaw is movable in relation to the second jaw between open and closed positions; a first mechanism extending between the tool assembly and the frame, the first mechanism including a clamp tube positioned at least partially within the frame, the clamp tube being movable from a retracted position to an advanced position to move the first jaw in relation to the second jaw from the open position to the closed position; a second mechanism extending between the frame and the tool assembly, the second mechanism including an extension tube, the extension tube being movable from a retracted position to an advanced position to actuate the tool assembly; and a bellows seal having a distal end and a proximal end and a central bellows portion, the bellows seal defining a throughbore, the distal end of the bellows seal being positioned to sealingly engage an outer surface of the extension tube and the proximal end of the bellows seal being positioned to sealingly engage the clamp tube, wherein as the clamp tube is moved from the retracted position to the advanced position, the bellows seal is compressed and expanded outwardly to seal against an internal surface of the frame.