Automatic adjuster for a vehicle shoe-drum brake

Details Automatic adjuster for a vehicle shoe-drum brake Automatic adjuster for a vehicle shoe-drum brake

1988-01-28

1989-06-13

Halvosa, George E. A.

Brakes

Wheel

Transversely movable

188196BA, 192111A, F16D 6556

Patent

active

048383902

ABSTRACT:
An automatic adjuster comprises a transmission member, suitably a crown wheel, and thrust assemblies, of which the effective lengths are adjustable to adjust the spacing between a pair of shoe-ends, and the crown wheel is coupled to a brake-applying cam through a lost-motion connection, and a clutch. In a brake-applying mode the transmission mechanism is operative to increase the effective lengths of the thrust assemblies after the lost-motion has been taken up and until a critical point is reached at which the clutch slips in one direction. An inhibit mechanism is incorporated for limiting movement of the crown wheel in the opposite brake release mode until any previous excess movement of the crown wheel in the brake-applying mode has been accommodated by slippage of the clutch in the opposite direction.

REFERENCES:
patent: 2109284 (1938-02-01), Brinck et al.
patent: 2109637 (1938-03-01), Gutkaiss
patent: 2733781 (1956-02-01), Brisson
patent: 3334713 (1967-08-01), Russell
patent: 3891068 (1975-06-01), Camph

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