Servo valve arrangement

Details Servo valve arrangement Servo valve arrangement

1995-06-28

1997-07-08

Nguyen, Hoang

Motors: expansible chamber type

With motive fluid valve

Relatively movable inlet and exhaust valves for single...

91464, 91465, F15B 1108

Patent

active

056449674

ABSTRACT:
A servo valve arrangement with a high-pressure, low-pressure and motor connection and with a pressure control valve arranged between the high-pressure connection and motor connection and a return control valve arranged between the motor connection and low-pressure connection is provided. The pressure control valve normally is closed and the return control valve normally is open. The pressure control valve can be opened by a common actuating member whilst closing the return control valve. The valve arrangement is suitable, in particular, for hydraulic power steering systems of motor vehicles with a so-called closed center.

REFERENCES:
patent: 3613508 (1971-10-01), Krehbiel
patent: 3922953 (1975-12-01), Strauff
patent: 3927604 (1975-12-01), Jablonsky
patent: 4523513 (1985-06-01), Gudat et al.
patent: 4699231 (1987-10-01), Lang et al.
patent: 5036750 (1991-08-01), Katayama
patent: 5058484 (1991-10-01), Kuttruf
patent: 5437216 (1995-08-01), Chapman
patent: 5476119 (1995-12-01), Herrmann

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