Patent ID: 8220597
Filing Date: 2012-07-17
Classification: F16D

Abstract:
1. A parking brake comprising a drum containing first and second brake shoe portions, a handbrake lever pivoted adjacent one end on one of the brake shoe portions and a strut extending between a first abutment on the handbrake lever and a second abutment on the other of the brake shoe portions so that pivoting of the handbrake lever relative to said one brake shoe portion moves the strut which in turn moves the other brake shoe portion away from said one brake shoe portion to bring the shoe portions into contact with the drum thus applying the parking brake, one of the abutments comprising a biased wedging means which acts on the strut to take up all play in the thrust path between the handbrake lever and the other brake shoe portion via the strut, means being provided for disabling the wedging means from operating except when initial manufacturing or assembly clearances are being taken up in the strut or when a subsequent manual adjustment of shoe clearance is being made, wherein the biased wedging means comprises a cam rotationally biased against one end of the strut by a spring means.