Impeller-drive shaft construction for a fuel pump
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United States of America Patent
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May 25, 2010
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app pub date -
Nov 15, 2006
filing date -
Nov 15, 2006
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Abstract
c) of the shaft to distribute wear which occurs between the shaft and the pumping element. This construction prolongs the operating life of the pump. In a roller vane type pump having N vanes, the motor shaft has a number of sides S determined by the formula S=N±1, and N>3.
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