Electrically operated flow control valve

Details Electrically operated flow control valve Electrically operated flow control valve

1995-09-08

1997-03-04

Lee, Kevin

Valves and valve actuation

Electrically actuated valve

Balanced valve

251282, F16K 3106

Patent

active

056071370

ABSTRACT:
A balanced pressure spool valve has a collector groove formed on the periphery of the valving spool adjacent the valving land, with an annular armature attached to the spool. The collector groove has a radially extending bleed hole which communicates with the axially extending pressure equalization bore in the spool. A solenoid coil upon increased current flow electromagnetically acts on the armature to progressively move the spool and the valving land closes outlet ports formed in the valving bore in which the spool is received. The collector groove intersects the outlet ports to provide bleed flow as the ports are closed by the valving land, thus attenuating the effect of any pressure force imbalance created by the increased flow velocity as the outlet ports are closed.

REFERENCES:
patent: 2987293 (1961-06-01), Knudson
patent: 4390158 (1983-06-01), Lang
patent: 4643227 (1987-02-01), Suzuki et al.
patent: 4852853 (1989-08-01), Toshio et al.
patent: 5299600 (1994-04-01), Aronovich

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