Fluid handling – Pressure modulating relays or followers
Patent
1975-08-12
1977-05-17
Cohan, Alan
Fluid handling
Pressure modulating relays or followers
1376142, G05D 1620
Patent
active
040235866
ABSTRACT:
An electrically-controlled, hydraulically-actuated valve, having an inlet joined to a main outlet through a pressure regulating chamber; a by-pass passage joined to the pressure regulating chamber through a second enlarged chamber coaxial with the first; a valve seat formed at the juncture of the two chambers; a slidable valve, having one end tapered to seat in the valve seat and coaxially passing through the second chamber; a flow restricting viscosity non-influenced orifice in the inlet passage to form a jet of the introduced fluid; a blind hole extending into the body of the valve from the first chamber, directly opposite the discharge end of the inlet passage and coaxial therewith to avoid any jet stream impulse force on the tapered piston; a magnetizable core mounted on the other end of the valve; an annular electrical coil surrounding the core; and a biasing valve mounted in the discharge end of the by-pass passage and spring-biased against the flow of fluid.
REFERENCES:
patent: 2645240 (1953-07-01), Drake
patent: 2934765 (1960-04-01), Carson
patent: 3410308 (1968-11-01), Moog
patent: 3804120 (1974-04-01), Garnett
Nemetz Lothar
Nusse Klaus
Bryan James E.
Cohan Alan
Eisenwerk Weserhutte AG
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