Patent ID: 8091753
Filing Date: 2012-01-10
Classification: A61B

Abstract:
1. A surgical device comprising: a tool assembly including a first jaw and a second jaw, the first jaw being movable relative to the second jaw between a spaced position and an approximated position, wherein the first jaw includes an anvil and the second jaw includes a cartridge assembly, the cartridge assembly including a support channel for receiving a fastener cartridge which is configured and dimensioned to retain a plurality of surgical fasteners therein; first and second cam followers supported on one of the first and second jaws; an approximation member including at least one cam surface which is configured, dimensioned, and positioned to engage the first and second cam followers, the approximation member being movable to move the at least one cam surface relative to the first and second cam followers to effect movement of the first and second jaws between the spaced position and the approximated position, wherein the approximation member is movable through the support channel of the cartridge assembly; and a dynamic clamping member operably associated with the first and second jaws, the dynamic clamping member being movable relative to the first and second jaws to actuate the tool assembly, and to maintain a desired gap between the first and second jaws at a location adjacent the dynamic clamping member, wherein the approximation member is configured, dimensioned, and positioned within the support channel such that the approximation member is confined to linear movement within the support channel, whereby movement of the approximation member causes movement of the first and second cam followers through the first and second cam channels to reposition the first and second jaws between the spaced and approximated positions, wherein the first and second cam channels are configured and dimensioned such that distal advancement of the approximation member through an actuating stroke causes approximation and separation of the first and second jaws in an alternating fashion, wherein the first and second cam channels are configured and dimensioned such that the actuating stroke of the approximation member includes a first portion, a second portion, and a third portion, the first and second jaws being approximated during the first portion of the actuating stroke, thereafter, the first and second jaws being separated during the second portion of the actuating stroke, and thereafter, the first and second jaws being approximated during the third portion of the actuating stroke.