Control valve assemblies for hydraulic braking systems

Details Control valve assemblies for hydraulic braking systems Control valve assemblies for hydraulic braking systems

1978-01-30

1980-02-19

Kunin, Stephen G.

Fluid-pressure and analogous brake systems

Motorman's valves

Multiple motors

60550, 60591, 303 6A, B60T 1506

Patent

active

041891910

ABSTRACT:
A control valve assembly for a vehicle dual hydraulic braking system in which hydraulic fluid from a distributor chamber can be supplied to one or both of a pair of outlets for connection to brakes on opposite sides of a vehicle. The assembly incorporates a pressure control valve operable to supply fluid under pressure to the chamber from an outlet for connection to a pressure source, irrespective of whether one or both of two separate brake-applying valves are to be operated, and a one-way valve is located on the upstream side of the pressure control valve to prevent flow in a reverse direction. A back-up piston works in a bore in communication with the chamber, and is provided to pressurize fluid in the chamber after an exhaust valve has closed and a pressure control valve has opened.

REFERENCES:
patent: 3727986 (1973-04-01), Koivunen
patent: 3827765 (1974-08-01), Husted

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