Electro hydraulic servo valve

Details Electro hydraulic servo valve Electro hydraulic servo valve

1980-10-14

1983-06-28

Rosenthal, Arnold

Valves and valve actuation

Electrically actuated valve

Remote or follow-up control system for electrical actuator

251141, 251282, F16K 3106

Patent

active

043901581

ABSTRACT:
A solenoid operated valve is provided particularly constructed to decrease friction in the course of operation and thus of the hysteresis or actuating lag effect. The general construction utilizes a solenoid acting to maintain closure of a valve by pulling on an armature to which is integrally secured a valve operating element having a valve head at one end and which passes through the core on which the solenoid is mounted. The armature has a piston formation extending into a pressure chamber of the housing. Pressure in the outlet of the valve communicates with the pressure chamber to maintain a net closing effect on the valve. Accordingly, pressures at the valve are prevented from acting against the energized solenoid.

REFERENCES:
patent: 2853659 (1958-09-01), Herion
patent: 3202182 (1965-08-01), Haviland
patent: 3325139 (1967-06-01), Diener et al.
patent: 3534770 (1970-10-01), Kowalski
patent: 3805203 (1974-04-01), Deckard
patent: 4074700 (1978-02-01), Engle

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