Optically controlled actuator

Details Optically controlled actuator Optically controlled actuator

1996-09-27

1998-01-20

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

13762562, 25112904, F15B 13043

Patent

active

057092451

ABSTRACT:
Fiber optics and photovoltaic devices for optically controlling a conventional Electro-Hydraulic Valve (EHV) without need for external wiring. One laser, one fiber and one photocell located at the EHV are electrically passive, and inherently reliable. The system is much less susceptible to hard-over failure and unsymmetrical control because changes in any one of these elements will affect both directions equally.

REFERENCES:
patent: 3612882 (1971-10-01), Sheppard
patent: 4132378 (1979-01-01), Stevens
patent: 4306314 (1981-12-01), Griffiths
patent: 4443853 (1984-04-01), Maciolek et al.
patent: 4651045 (1987-03-01), Wagner
patent: 4660589 (1987-04-01), Bartholomew
patent: 4716399 (1987-12-01), Nordlund
patent: 4742678 (1988-05-01), Bartholomew et al.
patent: 4931635 (1990-06-01), Toyama
patent: 5033694 (1991-07-01), Sato
patent: 5044155 (1991-09-01), Zimmerman
patent: 5085125 (1992-02-01), Emo et al.

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