Flow force compensating stepped shape spool valve
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United States of America Patent
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Oct 25, 2005
Grant Date -
Jan 1, 2004
app pub date -
Feb 20, 2003
filing date -
Jun 27, 2002
priority date (Note) -
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Abstract
Disclosed is a flow force compensating spool valve having a flow force compensating protrusion ring at a supply channel of a sleeve on an outer circumference portion of a spool rod, and a hydraulic valve, a pneumatic valve, a three-way valve, and a four-way valve using the spool valve, in which the flow force can be compensated by a simple structure change of the spool without changing a structure of the sleeve.
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