Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1998-03-03
2000-02-08
Ferensic, Denise L.
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
251 3003, 25112907, F16K 3102
Patent
active
060219971
ABSTRACT:
A proportional power control valve includes a solenoid controlling a main piston. The main piston is in fluid communication, through a feed opening, with the valve intake, and cooperates with a servo-control piston to block the valve intake from the valve outlet. The servo-control piston is part of a cylindrical armature controllable by an electromagnet of the solenoid, and can be moved counter to the bias of a locking spring. The locking spring is guided in a receiving chamber in the cylindrical armature. Since the receiving chamber of the cylindrical armature is in continuous fluid communication with the valve intake through a connection formed in the armature by an attenuation opening, the resulting proportional power control valve allows the continuous adjustment of the volume flow of a pressure medium or pressurized fluid dependent upon the level of electric control current supplied to the electromagnet.
REFERENCES:
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patent: 3903919 (1975-09-01), Zeuner
patent: 4463929 (1984-08-01), Dantlgraber et al.
patent: 4553732 (1985-11-01), Brundage et al.
patent: 4746093 (1988-05-01), Scanderbeg
patent: 4858886 (1989-08-01), Tatara
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patent: 5174544 (1992-12-01), Emanie
patent: 5205531 (1993-04-01), Kolchinsy
patent: 5538026 (1996-07-01), Kazi
Ferensic Denise L.
Flutec Fluidtechnische Gerate GmbH
Schoenfield Meredith H.
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