Automatically engaged emergency parking brake

Details Automatically engaged emergency parking brake Automatically engaged emergency parking brake

1975-02-18

1976-10-12

Reger, Duane A.

Brakes

Operators

Spring

303 16, B60T 1368

Patent

active

039852105

ABSTRACT:
A control system for a vehicle parking brake-actuator which releases the brake when subjected to fluid under pressure and which automatically sets the brake by spring force when the fluid pressure is relieved therefrom, the actuator being controlled by a valve which blocks or allows the relief of fluid pressure from the brake-actuator. The control system includes a solenoid for moving the valve to pressure-blocking position, a spring for moving the valve to pressure-relieving position when the solenoid is de-energized, and includes an electrical circuit for de-energizing the solenoid and causing an automatic setting of the brake if the vehicle engine is stopped or if there is a loss of oil pressure or electrical power. The brake can also be set by the operator when the engine is running.

REFERENCES:
patent: 2688719 (1954-09-01), Busquet
patent: 3528707 (1970-09-01), Casey
patent: 3759357 (1973-09-01), Bianchetta
patent: 3763975 (1973-10-01), Fontaine

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