Valve
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United States of America Patent
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-
Jul 8, 2003
Grant Date -
N/A
app pub date -
Aug 7, 2000
filing date -
Dec 9, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A settable control valve (13, 50, 113) has a closure member moveable within a passage-way (17, 71, 81A, 101, 117), there being at least one groove for fluid flow (25, 26, 44, 56, 57, 97, 98, 107, 108, 125, 126) in the wall of the passageway. The groove is of varying transverse cross-sectional area along its length and the closure member may be set at different positions so as to expose varying lengths of the groove to fluid flow, hence enabling different fluid flow rates to be established.
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