Brakes – Wheel – Transversely movable
Patent
1979-10-01
1982-06-29
Kazenske, Edward R.
Brakes
Wheel
Transversely movable
188 795P, 188332, 188106A, 188106F, F16D 5120, F16D 5150
Patent
active
043368670
ABSTRACT:
A drum brake assembly includes a pair of brake shoes which are carried by a backing plate and engageable with a hydraulic actuator. The hydraulic actuator is operable to move the pair of brake shoes from a rest position to a braking position. A strut extending between the pair of brake shoes cooperates with a parking arm to move the pair of brake shoes to the braking position during a parking brake application. A support assembly on the backing plate is disposed opposite the hydraulic actuator for the purpose of absorbing braking torque developed by the pair of brake shoes. The support assembly comprises a pair of slots and a lever. The lever is movable in response to movement of the parking arm to adjust the position of the pair of blocks relative to each other. In a first position the blocks are in abutment with the backing plate while in a second position the blocks are free to move a limited amount relative to the backing plate. Moreover, the lever imparts a separating force to the pair of brake shoes via the blocks during a parking brake application to expand the brake shoes radially. This expansion is in addition to the movement imparted to the brake shoes by the strut and parking arm.
REFERENCES:
patent: 2295758 (1942-09-01), Safford
patent: 3708044 (1973-01-01), Torri et al.
patent: 3977500 (1976-08-01), Farr
Decker Ken C.
Kazenske Edward R.
Schoenle Paul David
The Bendix Corporation
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