Emergency brake system employing shuttle valve

Details Emergency brake system employing shuttle valve Emergency brake system employing shuttle valve

1980-01-18

1982-02-02

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Releasing

Motor

188170, 303 2, 303 84A, 303 85, B60T 1322

Patent

active

043136435

ABSTRACT:
An emergency brake system for mine shuttle cars and the like wherein the brakes are applied by spring pressure and are normally released only when the hydraulic system for the shuttle car is activated. In the present invention, a hand pump is provided for releasing the brakes when the normal hydraulic system is not activated. This facilitates moving the shuttle car when it is not connected to a source of power. When the car is again connected to a power source and its hydraulic system activated, a shuttle valve initially releases the pressure produced by the hand pump and then returns the system to normal operation.

REFERENCES:
patent: 3272566 (1966-09-01), Clack
patent: 4119355 (1978-10-01), Kreitner

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