Flow control valve with a pressure compensation function

Details Flow control valve with a pressure compensation function Flow control valve with a pressure compensation function

1998-04-23

1999-05-18

Ferensic, Denise L.

Valves and valve actuation

Electrically actuated valve

Balanced valve

251282, 13761411, 3031192, F16K31/02

Patent

active

059043350

ABSTRACT:
A flow control valve having a pressure compensation function. This valve is free of fluid leakage and needs no pressure sensor. This valve includes a housing having a first port and a second port, a piston axially slidably mounted in the housing, a valve body formed at one end of the piston, a first fluid chamber defined between the other end of the piston and the housing, a second fluid chamber defined between the valve body and the housing, a variable-area orifice formed on the outer periphery of the piston and adapted to close when the piston is at a predetermined axial position, thereby shutting off the first fluid chamber and the first port from each other, a connecting path formed in the piston to communicate with the variable-area orifice and connecting the first fluid chamber with the second fluid chamber through a fixed-area orifice, an on-off valve comprising the valve body and a valve seat, a biasing means biasing the on-off valve at all times in a direction to open the on-off valve, and an electromagnetic biasing means for controlling the movement of the piston toward the biasing means.

REFERENCES:
patent: 5018797 (1991-05-01), Takata
patent: 5109886 (1992-05-01), Takata et al.
patent: 5431489 (1995-07-01), Lee
patent: 5472266 (1995-12-01), Volz et al.
patent: 5607137 (1997-03-01), Kanda et al.
patent: 5678902 (1997-10-01), Farr et al.
A Japanese Abstract of JP 3-90462.
A Japanese Abstract of JP 3-223578.
A Japanese Abstract of JP 6-83457.

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