Shoe and drum brake

Details Shoe and drum brake Shoe and drum brake

1981-01-23

1984-01-10

Butler, Douglas C.

Brakes

Wheel

Transversely movable

188196BA, F16D 5120

Patent

active

044248881

ABSTRACT:
In a shoe and drum brake wherein the shoes can move circumferentially of the drum between first and second limit positions and are biased towards the first limit positions, there is provided for transmitting force from an actuator to the shoes a lever or hydraulic device capable of transmitting the force unequally to the shoes. The larger force urges the shoes towards their second limit positions while the smaller force urges the shoes towards their first limit positions. During forward rotation of the drum, the shoes remain in their first limit positions and can be applied radially to the drum by movement of the actuator. When the drum is rotating in the reverse direction, the larger force moves the shoes circumferentially of the drum so that the actuator fails to apply the shoes to the drum and establish a braking torque.

REFERENCES:
patent: 1799227 (1931-04-01), Gunn
patent: 1919519 (1933-07-01), La Brie
patent: 1929517 (1933-10-01), Rockwell
patent: 3047099 (1962-07-01), Dahle
patent: 3951243 (1976-04-01), Chouings

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