Electrohydraulic control apparatus

Details Electrohydraulic control apparatus Electrohydraulic control apparatus

1980-02-28

1982-02-23

Cohen, Irwin C.

Fluid handling

Systems

Multi-way valve unit

91459, 91461, 13759616, F15B 13043

Patent

active

043164862

ABSTRACT:
The invention relates to an electrohydraulic control assembly of the type having a slide valve unit for controlling the operating direction of a hydraulic servomotor. The assembly includes a bridge circuit between the pressure source and the drain tank which has a pressure operated valve in each of its four branches. Diagonally opposite bridge terminals between the supply and exhaust branches of the bridge circuit are connected operating chambers on opposite sides of the slide valve unit. The bridge circuit valves are operated by solenoid valves to achieve selective directional operation of the slide valve unit.

REFERENCES:
patent: 2569881 (1951-10-01), Davies
patent: 2583185 (1952-01-01), McLeod
patent: 2672731 (1954-03-01), Ashton
patent: 2687706 (1954-08-01), Glenny et al.
patent: 2984257 (1961-05-01), McCormick et al.
patent: 3106219 (1963-10-01), Teston
patent: 3129645 (1964-04-01), Olmsted
patent: 3198203 (1965-08-01), Margida
patent: 3905393 (1975-09-01), Hartwig
patent: 4058140 (1977-11-01), Budzich

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