Robert Boschgmbh

Randall Michael Zonca

David Thomas Sadanowicz

William Eugene Sherman, Ii

Timothy James Posey

A drum-in-hat park brake assembly having a first brake shoe retained on a backing plate by a first pin and a second brake shoe retained by a second pin. The first and second pins permit the first and second brake shoes to be moved in a radial plane and to rotate about an axis of an opening in the backing plate. The first and second brake shoes each have a first engagement end which is aligned on the backing plate by an anchor post and a second engagement end which is selectively spaced apart by an adjuster mechanism. A spring arrangement urges the first and second brake shoes toward the anchor post and into engagement with the adjuster mechanism. An actuator assembly is connected to the first engagement end of the first and second brake shoes and upon receiving an input force moves first and second friction pads associated with the first and second brake shoes into radial engagement with a drum. The radial engagement causes the first and second brake pads to rotate and bring one of the first engagement ends into contact with the anchor post. The anchor post provides resistance to the rotation of the first and second brake pads during a corresponding brake application. The anchor post is characterized by a projection that extends from a wheel bearing housing fixed to a cast knuckle for a suspension system of the vehicle to provide a direct link between a fixed support in the vehicle and the first and second pads to resist rotative torque developed through the engagement of the friction pads with the drum during a brake application.

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Livonia, MI, United States of America

Randall Michael Zonca