Parking brake control system for railway vehicles

Details Parking brake control system for railway vehicles Parking brake control system for railway vehicles

1978-10-02

1979-11-27

Eisenzopf, Reinhard J.

Fluid-pressure and analogous brake systems

Locks

91 44, 91 45, 92 17, 188153R, 188265, B60T 1716

Patent

active

041757939

ABSTRACT:
A parking brake for use primarily on railway vehicles of the mass transit type in conjunction with the service brake apparatus but operable independently thereof. A parking brake hydraulic cylinder is mechanically connected to the brake shoe hanger of the brake unit. After the vehicle has been brought to a stop, a parking brake application may be made by supplying pressure, by a handpump, to the hydraulic cylinder which also includes a lock-nut actuable by the pressure, in excess of a certain pressure for locking the parking brake hydraulic cylinder in its applied position. A relief valve is provided for relieving the hydraulic cylinder of hydraulic pressure when the application is to be released.

REFERENCES:
patent: 2531055 (1950-11-01), Kirk
patent: 3238847 (1966-03-01), Moore
patent: 3746403 (1973-07-01), Jones

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