Coat Pump Assembly
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United States of America Patent
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Issued Date -
Sep 27, 2007
app pub date -
Apr 20, 2005
filing date -
Apr 23, 2004
priority date (Note) -
Abandoned
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Abstract
A roots blower pump (10) has its internal gaps between relatively moving parts reduced by adding a liquid coating to the intake of the pump while operating the pump. The liquid coating cures to a solid surface on the moving parts, presenting opposing relatively moving surfaces that mate with one another to reduce leakage losses.
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