Speed-related control mechanism for a pump and control method
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United States of America Patent
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Feb 28, 2012
Grant Date -
Mar 13, 2008
app pub date -
Sep 20, 2005
filing date -
Sep 20, 2004
priority date (Note) -
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Abstract
A pump system includes a fixed or variable capacity pump and a speed-related control mechanism to alter the capacity of a variable capacity pump or to alter the relief pressure of a fixed capacity pump in response to changes in the operating speed of the pump. A pressure generator comprising a volume of working fluid is rotated at a speed related to the operating speed of the pump and creates a forced vortex in the working fluid. The pressure induced in the working fluid of the forced vortex is used as a speed related control to alter the discharge pressure of the pump as desired.
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