Flow control valves
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United States of America Patent
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Aug 27, 2013
Grant Date -
Feb 21, 2008
app pub date -
Aug 13, 2007
filing date -
Aug 15, 2006
priority date (Note) -
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Abstract
A mechanically operated proportional flow control valve (8) which a valve spool (9) is described, which is moveable between two end limits limiting a regulating range. A device (20, 22) is described for selectively limiting the regulating range of the valve (8). This device can be used to block “locked-in” positions (F1, RH1) of the spool (9) at the end limits of the regulating range. The device includes a locking bar 20 which has locking formations (28, 29) which engage a pin (22) on a lever (11) connected with the spool (9).
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