Drum brake

Details Drum brake Drum brake

1990-10-12

1992-06-30

Graham, Matthew C.

Brakes

Wheel

Transversely movable

188 7954, 188 7955, 403 14, F16D 5100

Patent

active

051254840

ABSTRACT:
An improved drum brake includes a brake drum rotating along with a wheel, a backing plate provided to a stationary portion of a vehicle, a pair of brake shoes that are movably supported on the backing plate and a wheel cylinder attached to the backing plate. The wheel cylinder is adapted to expand the brake shoes to an operating position whereby friction linings attached to the brake shoes are frictionally engaged with an inner peripheral surface of the brake drum. An adjustable strut is disposed between the brake shoes to maintain the spacing therebetween and a return spring is provided adjacent the strut for retracting the brake shoes away from the inner peripheral surface of the brake drum. An end portion of the strut is provided with a bend portion parallel to a web of one of the brake shoes, the bend portion being sandwiched between the web of the brake shoe and an end of the return spring.

REFERENCES:
patent: 4101011 (1978-07-01), Burnett
patent: 4220227 (1980-09-01), Kluger
patent: 4502573 (1985-03-01), Carve 188 79.63

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