Air brake emergency control valves

Details Air brake emergency control valves Air brake emergency control valves

1992-11-27

1994-02-15

Oberleitner, Robert J.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

303 976, 303 28, 303 71, 137118, B60T 1322

Patent

active

052860957

ABSTRACT:
Control valve assemblies for regulating the parking/emergency spring brakes of a tractor trailer air brake system which include valve components for insuring that the spring brakes are not released until pressurization of the system's service reservoir is achieved and which components are operable to exhaust the spring brakes to atmosphere upon the failure of the supply pressures within the system to thereby automatically apply the spring brakes. In one embodiment, the valve components permit pressure to be supplied to release the spring brakes under circumstances when it is not possible to pressurize the service reservoir.

REFERENCES:
patent: 3862782 (1975-01-01), Horowitz et al.
patent: 3863992 (1975-02-01), Kurke et al.
patent: 3866623 (1975-02-01), Klimek
patent: 3947072 (1976-03-01), Plantan
patent: 4080004 (1978-03-01), Ury
patent: 4131324 (1978-12-01), Kurichh
patent: 4593954 (1986-06-01), Campanini
patent: 5172958 (1992-12-01), Sell

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