Actuator device for a hydraulic spool valve

Details Actuator device for a hydraulic spool valve Actuator device for a hydraulic spool valve

1982-12-22

1985-07-02

Michalsky, Gerald A.

Valves and valve actuation

With correlated flow path

With mounting or support

13762565, 251133, 251248, F16K 3104, F16K 3154, F15B 13044

Patent

active

045263426

ABSTRACT:
There is disclosed an actuation device for operating a hydraulic spool valve. The device includes a d.c. electric motor and a high-ratio gearbox. The output of the gearbox connects with the spool of the valve through a segmented rack and pitman pin or a rack and pinion arrangement. A control circuit for the electric motor includes position feed-back to permit accurate positioning of the spool. Further, spring means are included to bias the spool to its neutral position in the absence of a control signal or on occurrence of a fail condition.

REFERENCES:
patent: 1602936 (1926-10-01), Reeves
patent: 2205512 (1940-06-01), Anderson
patent: 2503563 (1950-04-01), Ray
patent: 3616820 (1971-11-01), Fleckenstein
patent: 3756282 (1973-09-01), Knutson
patent: 4190081 (1980-02-01), Coles
patent: 4237742 (1980-12-01), Barthruff

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