Patent ID: 9693762
Date: 2017-07-04
CPC Classifications: A61B

Claim:
1. A tissue retractor comprising at least two blades, the at least two blades forming a surgical corridor, the tissue retractor comprising: a frame having a first cam and a second cam disposed on a first side surface of the frame, wherein the first cam is disposed on a distal end of the frame and the second cam is spaced apart from the first cam in both a longitudinal direction and a vertical direction so as to be offset from the first cam; and a cam follower operatively connected to one of the at least two blades, the cam follower being generally orthogonal to a longitudinal axis of the one of the at least two blades and disposed adjacent a proximal end of the one of the at least two blades, the cam follower movable with respect to the frame, wherein the cam follower is adapted to follow the first cam and the second cam simultaneously so as to drive a distal end of the one of the at least two blades further away than a proximal end of said one of the at least two blades during actuation of the retractor, wherein the first cam and the second cam each include a cam surface having an arcuate path on a plane generally orthogonal to a diameter of the surgical corridor.