Fluid pressure braking system with parking brake-service brake i

Details Fluid pressure braking system with parking brake-service brake i Fluid pressure braking system with parking brake-service brake i

1976-02-17

1977-04-19

Halvosa, George E. A.

Fluid-pressure and analogous brake systems

Multiple control

303 77, B60T 1516

Patent

active

040184854

ABSTRACT:
A vehicle fluid pressure braking system is disclosed which includes brake-applying devices having separate service and parking actuators. Separate service and parking actuation circuits are provided to control actuation of the service and parking actuators, respectively. An interlocking valve is provided which prevents release of the parking actuator until a predetermined fluid pressure level is communicated to the service actuator. This interlocking valve prevents inadvertent release of the parking actuators, and also prevents release of the parking actuators in a situation in which a malfunction of the service braking circuit would render operation of the vehicle dangerous.

REFERENCES:
patent: 1858493 (1932-05-01), George
patent: 3228729 (1966-01-01), Schubert
patent: 3266850 (1966-08-01), Herold
patent: 3273950 (1966-09-01), Vielmo
patent: 3397924 (1968-08-01), Lederer
patent: 3680314 (1972-08-01), Toomey
patent: 3713702 (1973-01-01), Campaning
patent: 3863992 (1975-02-01), Kurke et al.

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