Spool type change-over valve
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United States of America Patent
Stats
-
Sep 5, 1995
Grant Date -
N/A
app pub date -
Feb 16, 1994
filing date -
Feb 15, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a pilot-driven spool type change-over valve, a lateral width of a valve body and sizes of each port and valve hole are efficiently determined in such a manner that flow rate or fluid per unit time reaches the highest value without substantially impairing responsiveness in order to increase ability to change over the fluid. An inner diameter of the valve hole a lateral length of an opening of the port are set to substantially the highest value as determined by lateral width of the valve body, and longitudinal diameter a of an opening of each port, i.e. length in axial direction in the valve hole, is set to such a size that a characteristic value given by a/W.sup.2 is 1.5 to 2.2.times.10.sup.-2.
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Cited Art Landscape
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