Patent ID: 6651789
Filing Date: 2003-11-25
Classification: F16D

Abstract:
A drum-in-hat park brake assembly for a vehicle wherein first and second brake shoes are positioned on and radially aligned with a backing plate by-first and second pins, said backing plate being secured to a knuckle of a suspension system in the vehicle, each of said first and second brake shoes having a first end that is aligned with respect to an anchor post that extends from said knuckle and are selectively spaced apart from each other by an actuator mechanism and a second end that are linked to each other by an adjuster mechanism, resilient means connected to said first and second brake shoes for urging said first ends toward said anchor and said second ends toward said adjuster to define a rest position for said first and second brake shoes wherein a running clearance is established between said first and second brake shoes and an engagement surface on said drum, a cable assembly having a first end connected to a lever of said actuator mechanism and a second end for receiving an input from an operator, said cable assembly being responsive to an input force applied to said second end of said cable assembly by pulling on said lever to expand said actuator assembly and move said first and second brake shoes from said position of rest into engagement with said drum to effect a brake application, said brake cable assembly including a release spring located between said first end of said cable assembly and said knuckle for urging said first end of said cable assembly toward said actuator mechanism to allow said resilient means to return said first and second brake shoes to said position of rest on termination of said input force on said second end of said cable assembly, said backing plate being characterized by a flange having a slot therein and said cable assembly being characterized in that said first end thereof has a stem with an annular rib thereon, said stem passing through said slot and said annular rib engaging said flange to limit the movement of said first end of said cable assembly toward said actuator mechanism to prevent said lever from being axially moved past a position of rest and to prevent a change in the radial alignment between said first and second brake shoes and said backing plate by the action of the release spring.