Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Re-entry working fluid joins inlet working fluid upstream of...
Reexamination Certificate
2007-02-20
2010-11-09
Nguyen, Ninh H (Department: 3745)
Rotary kinetic fluid motors or pumps
With means for re-entry of working fluid to blade set
Re-entry working fluid joins inlet working fluid upstream of...
C415S168200, C415S145000, C415S229000, C415S230000
Reexamination Certificate
active
07828509
ABSTRACT:
A fuel pump includes a bearing element disposed in proximity to an impeller. The bearing element is configured to form a fuel seal with the impeller and to drain fuel leaked from the pump chamber back into the pump chamber. The bearing element minimizes leakage of fuel from the pump chamber into an engine coupled to the impeller. The fuel pump also includes redundant lip seals configured to provide redundant sealing relative to a shaft of the impeller within the fuel pump in order to minimize engine oil from entering the pump chamber and to minimize fuel from entering the engine. Integration of both the bearing element and the redundant lip seals as part of the fuel pump results in the fuel pump having a relatively compact size.
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International Search Report for PCT Application No. PCT/US2007/082655, issued Mar. 4, 2008 (4 pages).
Gundrum William
Lysinger Forrest Ross
Matas Scott
Morris James Paul
BainwoodHuang
Lycoming Engines, a division of Avco Corp.
Nguyen Ninh H
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