Valve and control therefor

Details Valve and control therefor Valve and control therefor

1976-02-17

1977-05-17

Cohan, Alan

Fluid handling

Systems

Multi-way valve unit

251 30, 251282, F15B 13043

Patent

active

040235939

ABSTRACT:
A hydraulic valve has a non-heating, low-power electric control. A main valve is movable in a main valve body to interconnect and isolate pressure, tank or drain and cylinder passages. Pressure to operate the main valve is controlled by pilot poppet valves having passages joined to the pressure and tank passages. The poppet pilot valves are individually actuated by the solenoids. Alternatively, the main valve body may have pressure and drain poppet valves arranged in pairs with similar, non-heating solenoid actuators for the pressure valves and cross-connected pressure actuation for the drain valves.

REFERENCES:
patent: 2831650 (1958-04-01), Richardson
patent: 2930404 (1960-03-01), Kowalski et al.
patent: 3534770 (1970-10-01), Kowalski
patent: 3554234 (1971-01-01), Kurtz
patent: 3559686 (1971-02-01), Hoffman
patent: 3804120 (1974-04-01), Garnett
patent: 3821967 (1974-07-01), Sturman

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