Auxiliary actuation mechanism for a brake assembly

Details Auxiliary actuation mechanism for a brake assembly Auxiliary actuation mechanism for a brake assembly

1989-01-17

1989-08-15

Halvosa, George E. A.

Brakes

Operators

Spring

74480R, 251289, 303 2, 303 601, 303 13, F16D 6524

Patent

active

048566225

ABSTRACT:
In the braking systems of many vehicles, a parking brake is utilized that is spring applied and fluid pressure released. In the event of a mechanical breakdown, a mechanical device or other specialized tools must be used to bring about the disengagement of the parking brake so that the vehicle may be towed. The present invention overcomes this problem by providing an auxiliary actuating mechanism for a spring applied, fluid pressure released parking brake that includes an auxiliary accumulator that will maintain a preselected amount of pressure upon the loss of the primary source of pressure. An auxiliary actuating valve is positioned between the accumulator and the parking brake to selectively communicate fluid therebetween. The auxiliary actuating mechanism is provided with two remotely located actuators that may be utilized to selectively position the valve to permit the communication of the pressurized fluid within the accumulator with the parking brake assembly to achieve the disengagement thereof.

REFERENCES:
patent: B545856 (1976-03-01), Schexnayder
patent: 2270431 (1942-01-01), Freeman
patent: 3613839 (1971-10-01), MacDuff
patent: 3995426 (1976-12-01), Habiger
patent: 3999075 (1976-12-01), Johnson et al.
patent: 4119000 (1978-10-01), Venable
patent: 4190298 (1980-02-01), Klope
patent: 4245724 (1981-01-01), Beck
patent: 4293164 (1981-10-01), Hoefer et al.

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