Patent ID: 8181840
Filing Date: 2012-05-22
Classification: A61B

Abstract:
1. A surgical stapling device comprising: an elongated body portion; a distal head portion including an anvil assembly and a shell assembly supported on the distal end of the elongated body portion, the anvil assembly including an anvil head assembly and an anvil shaft, the shell assembly supporting a plurality of staples, the anvil assembly being movable in relation to the shell assembly between spaced and approximated positions; and an approximation mechanism including a rotatable approximation knob, a drive member, and an extension mechanism, the approximation knob being operably connected to the drive member and being actuable to effect axial movement of the drive member over a first distance; wherein the extension mechanism operably connects the drive member to the anvil shaft such that axial movement of the drive member over the first distance effects axial movement of the anvil shaft over a second distance which is greater than the first distance.