Patent ID: 9743947
Date: 2017-08-29
CPC Classifications: A61B

Claim:
1. A surgical instrument, comprising: a shaft comprising a proximal end and a distal end; an ultrasonic waveguide at least partially positioned within the shaft, the waveguide having a proximal end and a distal end; an ultrasonically actuated blade positioned at the distal end of the waveguide; and a clamp arm assembly pivotally connected to the distal end of the shaft, wherein the clamp arm assembly comprises at least two camming members rotationally attached to a clamp arm, wherein the clamp arm is movable between an open position and a closed position relative to the blade to compress tissue intermediate the clamp arm and the blade when in the closed position, wherein the at least two camming members rotate relative to the clamp arm to separate tissue layers when the clamp arm moves between the open position and the closed position, wherein the at least two camming members selectively compress the tissue at a first rolling compressive force when a first portion of the camming members contact the tissue and a second rolling compressive force when a second portion of the camming members contact the tissue, wherein the first rolling compressive force is greater than the second rolling compressive force, and wherein the at least two camming members each comprise: