Fluid metering pump
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United States of America Patent
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-
May 27, 2003
Grant Date -
N/A
app pub date -
Oct 31, 2001
filing date -
Oct 31, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A pump (10) includes a chamber (14) communicating with a fluid inlet (12) and a fluid outlet (13) above the centerline thereof to minimize dead air space where air bubbles might form. A connector (21) having a bend or elbow (26) is formed at the fluid inlet (12). Upon actuation of a solenoid (37), a plunger (39) carrying a diaphragm (42) is moved to draw fluid around the elbow (26), through a valve (19) positioned at the fluid inlet (12), through the chamber (14), and out of the pump (10) through a valve (30) positioned at the fluid outlet (13). The energy of the fluid which might otherwise create a water hammer effect is absorbed by the elbow (26) prior to reaching the pump (10).
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