PRESSURE GRADIENT ROTARY SEALING SYSTEM
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United States of America Patent
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Issued Date -
Apr 12, 2007
app pub date -
Sep 14, 2006
filing date -
Sep 16, 2005
priority date (Note) -
Abandoned
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Abstract
A pressure gradient rotary sealing system is described which uses a pressure-reducing piston in several configurations with surface area differentials thereby reducing the pressure times velocity (PV) value for each of the sequential seals to extend seal system life and provide early indication of impending seal failure.
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