Shoe drum brakes for vehicles

Details Shoe drum brakes for vehicles Shoe drum brakes for vehicles

1975-09-15

1976-08-31

Reger, Duane A.

Brakes

Operators

Multiple

188196D, 188326, 188342, F16D 6524, F16D 5124

Patent

active

039775003

ABSTRACT:
An internal shoe-drum brake in which arcuate shoes carrying friction linings for engagement with a rotatable drum are mounted on a stationary back-plate and the shoes are separated at one end to bring them into engagement with the drum by a service actuator for normal service braking and at the other end by a mechanical parking actuator. Abutments are provided at or adjacent to the mechanical parking actuator to take the braking loads when the brake is applied by the service actuator, and means are provided in or adjacent to the service actuator for transmitting servo braking forces from one shoe to the other when the brake is applied by the mechanical parking actuator. An actuating member is operative to actuate the parking actuator to release energy stored therein thereby applying continuously to the shoes a force to urge them into engagement with the drum irrespective of the initial position of the shoes when the actuating member is operated.

REFERENCES:
patent: 2140741 (1938-12-01), Goepfrich
patent: 2293600 (1942-08-01), Eksergian
patent: 2385812 (1945-10-01), Hoyt
patent: 2598609 (1952-05-01), Samuel
patent: 2619203 (1952-11-01), Shaw
patent: 3322241 (1967-05-01), Cox et al.
patent: 3463276 (1969-08-01), Brooks
patent: 3752266 (1973-08-01), Chouings

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