Force balanced valve spool

Details Force balanced valve spool Force balanced valve spool

1976-01-30

1976-11-09

Schwadron, Martin P.

Fluid handling

Systems

Multi-way valve unit

251282, F16K 1107

Patent

active

039904776

ABSTRACT:
A flow control valve includes a valve body defining a main bore and a cross-drilled bore communicating therewith. A valve spool is reciprocable within the main bore and includes first and second lands connected by a reduced diameter connecting portion. The connecting portion has fixed relative thereto and thereabout an annular rib, positioned between the two lands. The rib acts as a guide to direct fluid substantially perpendicular to the axis of reciprocal motion of the spool when the spool is positioned to allow fluid flow between the main and cross-drilled bores, to minimize fluid flow forces tending to hold the spool in an open position.

REFERENCES:
patent: 2718240 (1955-09-01), Margrave
patent: 2831496 (1958-04-01), Jensen
patent: 3729026 (1973-04-01), Wilke
patent: 3735780 (1973-05-01), Heid

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