Drum brake adjuster

Details Drum brake adjuster Drum brake adjuster

1979-02-09

1981-02-17

Halvosa, George E. A.

Brakes

Wheel

Transversely movable

188196BA, 188250A, 188250B, 192111A, F16D 6556

Patent

active

042509807

ABSTRACT:
A drum brake assembly includes a pair of brake shoes which are movable from a non-braking position to a braking position in engagement with a rotatable member. A hydraulic actuator is engageable with the pair of brake shoes to move the latter to the braking position and a strut extends between the pair of brake shoes to substantially define the non-braking position. The strut comprises a unitary sleeve with a bore for receiving projections extending from the pair of brake shoes. The bore is stepped with a threaded portion and a tapered diameter portion. The threaded portion engages one of the projections on one of the brake shoes such that rotation of the unitary sleeve by a pawl causes the unitary sleeve and other brake shoe to move away from the one brake shoe. The unitary sleeve is radially expanded at an intermediate location to define a ratchet wheel in engagement with the pawl. Moreover, a parking lever is engageable with the unitary sleeve to move the pair of brake shoes to a braking position in response to movement of the parking lever.

REFERENCES:
patent: 3017962 (1962-01-01), Ingres
patent: 3195690 (1965-07-01), Johannesen et al.
patent: 3556262 (1971-01-01), Dombeck
patent: 4101011 (1978-07-01), Burnett

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