Fluid handling – Systems – Multi-way valve unit
Patent
1996-04-10
1999-03-30
Fox, John
Fluid handling
Systems
Multi-way valve unit
25112907, F16K 3104
Patent
active
058876219
ABSTRACT:
A bidirectional on/off spool valve has circumferentially-extending through-slots in a spool which are axially alignable with circumferentially-extending grooves in the main bore. The slots and grooves create a flow path through the valve which minimizes Bernoulli forces that tend to close the valve or create negative Bernoulli forces which help keep the valve open. The spool has a stop wall at its closed end which restricts the open area of the lumen of the spool and a balance tube extends forwardly from the stop wall to equalize the pressure behind the stop wall with the pressure in front of the stop wall, so that the spool is not locked in the open position.
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Abstract of Japanese Pub. No. 60-157575 (1), published Aug. 1985.
Applied Power Inc.
Fox John
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