Electrohydraulic control unit

Details Electrohydraulic control unit Electrohydraulic control unit

1975-09-11

1976-06-22

Cohan, Alan

Fluid handling

Systems

Multi-way valve unit

91 51, F15B 1112, F15B 13043

Patent

active

039645185

ABSTRACT:
An electrohydraulic control unit which regulates the flow of hydraulic fluid to and from one or more consumers by way of a directional control valve has a cylinder for a piston which is mechanically connected with or constitutes the spool of the directional control valve and divides the interior of the cylinder into two plenum chambers connected to the outlet of the pump, either directly or by way of a pressure reducing valve. The chambers are further connected with the tank and each of the fluid supplying and evacuating conduits for each of the two chambers contains a flow restrictor. Th flow restrictors in conduits for admission of fluid to the chambers are mounted upstream of check valves and the flow restrictors in conduits for evacuation of fluid from the chambers are mounted upstream of or constitute integral parts of two solenoid-operated auxiliary valves. The four flow restrictors together constitute a hydraulic bridge circuit.

REFERENCES:
patent: 2944526 (1960-07-01), Jarvis
patent: 3582039 (1971-06-01), Cagle

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