Optical-hydraulic control system

Details Optical-hydraulic control system Optical-hydraulic control system

1983-02-18

1985-09-03

Michalsky, Gerald A.

Fluid handling

Pressure modulating relays or followers

With counter-balancing pressure feedback to the modulating...

60527, 137 82, 13762562, 13762564, 251 11, F15B 13043

Patent

active

045386331

ABSTRACT:
An optical hydraulic control wherein the flow of hydraulic fluid is controlled by movement of a valve spool 12. Movement of the valve spool is initiated by a hydraulic pressure differential that is established by moving a control member 34 out of an equilibrium position. Movement of the control member from its equilibrium position is accomplished by illumination of a beam support structure 36 with an optical command signal. The control member 34 is returned to its equilibrium position after appropriate movement of a valve spool 12 by mechanical linkage between control member 34 and valve spool 12 or, alternatively, by modulation of the optical command signal.

REFERENCES:
patent: 2687007 (1954-08-01), Reitz
patent: 3152612 (1964-10-01), Avery
patent: 3163180 (1964-12-01), Campbell
patent: 3442483 (1969-05-01), Schwartz
patent: 3857541 (1974-12-01), Clark
patent: 3866620 (1975-02-01), Morton
patent: 4142553 (1979-03-01), Sakakibara et al.
patent: 4219181 (1980-08-01), Joelson
patent: 4306314 (1981-12-01), Griffiths
patent: 4445541 (1984-05-01), Schmiel

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