Pilot operated stepping valve

Details Pilot operated stepping valve Pilot operated stepping valve

1977-04-25

1979-03-27

Michalsky, Gerald A.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91461, 13762564, F15B 13043

Patent

active

041459563

ABSTRACT:
A pilot operated stepping valve where an electrical pulse motor drives a pilot valve spool which controls the flow of hydraulic fluid driving a main valve spool which actuates a hydraulic motor or actuator. The main valve spool follows the pilot spool and is hence sensitive to the pulses received by the pulse motor.

REFERENCES:
patent: 2654347 (1953-10-01), Clark
patent: 3079899 (1963-03-01), Inaba et al.
patent: 3125002 (1964-03-01), McCombs
patent: 3310284 (1967-03-01), Inaba et al.
patent: 3709257 (1973-01-01), Faisandier
patent: 3805670 (1974-04-01), Fallows
patent: 3875849 (1975-04-01), Patel
patent: 3891145 (1975-06-01), Bartholomaus et al.

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