Pressure motive pump assembly comprising a float, an over center linkage mechanism, and a pair of positive stop or abutment means for ensuring over center tripping action
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United States of America Patent
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-
Jun 3, 2003
Grant Date -
Apr 11, 2002
app pub date -
Aug 16, 2001
filing date -
Oct 3, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A motive pump assembly comprising a hollow housing having an inlet valve and outlet valve for a fluid to be pumped, an inlet valve for a motive fluid operatively between open and closed positions, a vent valve and means for simultaneously opening and closing the inlet valve and vent valve for the motive fluid, and a float and over center linkage mechanism operatively connected to said valve actuating means, whereby the mechanism snaps over center when the float is located at upper and lower limit positions thereby producing a pumping action of fluid to be pumped through the housing and positive stop means ensuring over center tripping action of the linkage when the float is at opposing upper and lower limit positions.
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