Pumps – Motor driven – Including means utilizing pump fluid for augmenting cooling,...
Patent
1982-03-29
1984-05-29
Freeh, William L.
Pumps
Motor driven
Including means utilizing pump fluid for augmenting cooling,...
417423R, 415 53T, 415106, 415213T, F04B 3504, F04D 500, F01D 300
Patent
active
044512139
ABSTRACT:
An electrically operated fuel pump device comprises a regenerative pump component and an electric motor component operatively connected to the regenerative pump component to actuate the same. The regenerative pump component includes a pump casing having spaced inner surfaces thereof cooperating with each other to define therebetween a pump chamber. An impeller is disposed within the pump chamber rotatably and axially movably. Clearances are defined between axial end faces of the impeller and the inner surfaces of the pump casing, respectively. Liquid fuel increased in pressure to a discharge pressure by the rotation of the impeller is introduced into the clearances to act on the axial end faces of the impeller so as to minimize the direct contact of the axial end faces of the impeller with the respective inner surfaces of the pump casing.
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Hattori Yoshiyuki
Matsui Kazuma
Nakamura Toshiaki
Ohnishi Shunsaku
Takei Toshihiro
Freeh William L.
Neils Paul F.
Nippondenso Co. Ltd.
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