Patent ID: 7182182
Filing Date: 2007-02-27
Classification: F16D

Abstract:
1. A drum brake including a plate on which a first brake having a friction lining and a second brake shoe having a friction lining are mounted, application means for applying a force moves said first and second brakes shoes against a wheel drum in response to a braking command, and resilient return means for spacing said first and second brake shoes apart from the wheel drum when braking ceases, said first and second brake shoes each being mounted to respectively slide along an essentially radial axis between first and second guide walls secured to said plate, said application means for moving said first and second brake shoes bearing against end exerting a substantially radial force on an inside wall of said first and second brake shoes through a lever arrangement including a first lever having a first end for receiving the braking command and a second end that is located on said plate to define a first hinge and a second lever having a first end for receiving said braking command and a second end that is located on said plate to define a second hinge, a first control bar attached to said first lever through a first hinge pin and a second control bar attached to said second lever through a second hinge pin, said radial force being derived from the braking command said first and second levers respectively pivoting about said first and second hinges and said first and second control bars respectively pivoting about said first and second hinge pins such that said first and second brake shoes move along a radial plane with respect to said first and second guide walls.