Valves and valve actuation – Electrically actuated valve – Remote or follow-up control system for electrical actuator
Patent
1982-11-30
1985-06-25
Rosenthal, Arnold
Valves and valve actuation
Electrically actuated valve
Remote or follow-up control system for electrical actuator
251141, 251337, F16K 3106
Patent
active
045249474
ABSTRACT:
A normally closed spool type solenoid-controlled valve which changes its opening in proportion to the amount of current supplied to the solenoid. The spool which blocks the valve opening in an overlapping relation is held in a closed position by a dual spring design having differing spring rates wherein the lighter spring holds the spool in an overlapping closed position.
REFERENCES:
patent: 2436992 (1948-03-01), Ernst
patent: 2987293 (1961-06-01), Knudson
patent: 3100103 (1963-08-01), Bullard
patent: 3220184 (1965-11-01), Oprecht
patent: 3684238 (1972-08-01), Michellone et al.
patent: 3788597 (1974-01-01), Ichioka
patent: 3970282 (1976-07-01), Hansen
Barnes Pierre D.
Marts Maynard W.
Brown, Jr. Edward L.
Rosenthal Arnold
The Cessna Aircraft Company
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