Variable flow water pump
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United States of America Patent
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-
Aug 30, 2005
Grant Date -
Sep 4, 2003
app pub date -
Apr 12, 2001
filing date -
Apr 13, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A variable-capacity water pump includes a housing having an impeller mounted on a rotatable shaft. The impeller includes a plurality of vanes pivotally coupled between upper and lower shroud and operatively coupled to a pitch plate. As the pump speed increases in response to increasing engine speed, the pitch plate controls the rotation of the impeller vanes about a fixed rivet from a maximum pitch position, toward a minimum pitch position, thereby lowering pump output according to engine cooling requirements.
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