2/2 directional seat valve

Details 2/2 directional seat valve 2/2 directional seat valve

1994-06-28

1996-04-23

Fox, John C.

Fluid handling

Systems

Multi-way valve unit

251324, 251368, F16K 138

Patent

active

055094473

ABSTRACT:
Disclosed is a 2/2 directional seal valve with direct control comprising a housing and a seat piston installed, i.e., located, in leakproof and slidable manner in the housing. The piston has a conical surface which acts together with a seating surface located in the housing to open and close a passageway for passing pressure medium therethrough. A closing spring is also provided. One end of the closing spring bears against the housing and another end of the closing spring bears against the seat piston. In order to achieve a valve of this type which, while functioning in a leakage-free manner, has a low weight and is especially suitable for use in aircraft hydraulics. The seat piston comprises a high-strength carbon-fiber-reinforced plastic and the housing comprises light metal or a light metal alloy.

REFERENCES:
patent: 572297 (1896-12-01), Hennebohle
patent: 2692614 (1954-10-01), McLeod
patent: 4570585 (1986-02-01), Hayashi
patent: 4621656 (1986-11-01), Achimarn
patent: 4786031 (1988-11-01), Waldrop
Der Hydraulik Trainer; Grundlagen und Komponenten der Fluidtechnik Hydraulik, Exner et al.; pp. 1, 203 and 204.

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