Pilot operated servo valve

Details Pilot operated servo valve Pilot operated servo valve

1994-05-24

1995-08-29

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

13762563, 13762568, F15B 13043

Patent

active

054451884

ABSTRACT:
A pilot-operated servo valve design for efficient mounting in a control block has at least three main-stream ports. An opening into a control sleeve for a first main-stream port is disposed opposite an end surface of a main control piston. The main control piston has a pressure-equalizing surface disposed in a pressure-equalizing chamber, which is fluidically coupled by a pressure-equalizing duct in the main control piston to the first main-stream port. A return spring urges the main control piston toward a first axial end stop to clearly define a safety position. The valve exhibits good dynamic properties.

REFERENCES:
patent: 3010438 (1961-11-01), Fife et al.
patent: 3215163 (1965-11-01), Henderson
patent: 3234968 (1966-02-01), Frantz
patent: 3722547 (1973-03-01), Kirstein
patent: 4827981 (1989-05-01), Livecchi et al.
patent: 4938118 (1990-07-01), Wolfges et al.
patent: 5144983 (1992-09-01), Schwelm

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