Patent ID: 8062217

Claim:
A surgical retractor, comprising: a first blade holder, a second blade holder, the length adjustment mechanism slidingly coupled to the first blade holder and the second blade holder, the length adjustment mechanism configured to move the first blade holder relative to the second blade holder; a first blade angle adjustment mechanism coupled to the first blade holder and a first and third blade, the first blade angle adjustment mechanism including: a first activator, a first boss coupled to the first activator such that when the first activator is activated, the first boss moves in a longitudinal direction with respect to the first activator, a first fulcrum coupled to the first blade holder, a first yoke pivotedly coupled to the first fulcrum having a driving lever portion coupled to the boss and a follower lever portion, a first leg portion coupled to the follower lever portion, wherein the first blade is coupled to the first leg portion such that when the first boss moves in the longitudinal direction with respect to the activator, the first yoke pivots about the first fulcrum causing the first blade to rotate, a third fulcrum coupled to the first blade holder, a third yoke pivotedly coupled to the third fulcrum having a driving lever portion coupled to the boss and a follower lever portion, a third leg portion coupled to the follower lever portion, wherein the third blade is coupled to the third leg portion such that when the first boss moves in the longitudinal direction with respect to the activator, the third yoke pivots about the third fulcrum causing the third blade to rotate, and a second blade angle adjustment mechanism coupled to the second blade holder and a second and fourth blade, the second blade angle adjustment mechanism including: a second activator, a second boss coupled to the second activator such that when the second activator is activated, the second boss moves in a longitudinal direction with respect to the second activator, a second fulcrum coupled to the second blade holder, a second yoke pivotedly coupled to the second fulcrum having a driving lever portion coupled to the boss and a following lever portion a second leg portion coupled to the following lever portion, wherein the second blade is coupled to the second leg portion such that when the second boss moves in the longitudinal direction with respect to the activator, the second yoke pivots about the second fulcrum causing the second blade to rotate, a fourth fulcrum coupled to the second blade holder, a fourth yoke pivotedly coupled to the fourth fulcrum having a driving lever portion coupled to the boss and a follower lever portion, a fourth leg portion coupled to the following lever portion, wherein the fourth blade is coupled to the fourth leg portion such that when the second boss moves in the longitudinal direction with respect to the activator, the fourth yoke pivots about the fourth fulcrum causing the fourth blade to rotate.