Fluid control spool valve

Details Fluid control spool valve Fluid control spool valve

1992-02-24

1994-03-22

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

91434, 251900, F15B 1302, F15B 1314

Patent

active

052955125

ABSTRACT:
Spool valve for fluid systems, the valve having a slidable spool in a bore in a valve block having three ports spaced aially along the bore for control of fluid flow, the spool having three spaced O-ring seals to correspond with the ports and having a reduced diameter portion between two of the O-ring seals, and a pressure-equalizing conduit connecting one end of the spool with the outlet port of the valve. Small lands of substantially equal diameter to the spool adjacent the reduced diameter portion before the two O-ring seals provides restricted or throttled fluid flow prior to increased fluid flow via reduced diameter portion.

REFERENCES:
patent: 2899939 (1959-08-01), Norris
patent: 2979080 (1961-04-01), Hewitt
patent: 2997065 (1961-08-01), Johnson
patent: 3043331 (1962-07-01), Peters
patent: 3140728 (1964-07-01), Webb
patent: 3316031 (1967-04-01), Henry-Biabaud
patent: 3706322 (1972-12-01), Carlson
patent: 3807441 (1974-04-01), Grosseau

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