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Title:
ELECTRIC FUEL PUMP
Document Type and Number:
WIPO Patent Application WO/2000/040852
Kind Code:
A1
Abstract:
An electric fuel pump wherein blade members (31) on an outer circumferential portion of an impeller (30) are arranged in a divided and staggered manner on outer and inner surfaces of a partition wall (32) so that the outer circumferential surfaces of the blade members (31) project outward beyond the outer circumferential surface of the partition wall (32), whereby a fuel entering blade grooves (33) formed in a divided manner in the outer and inner sides of the partition wall does not simultaneously impinge upon an end surface (9b) of a radial seal portion (9a), so that noise which is ascribed to the impingement of the fuel can be reduced, this arrangement being also able to prevent the occurrence of a reverse flow region directly above the partition wall (32), so that a pumping efficiency can be improved.

Inventors:
YOSHIOKA HIROSHI (JP)
Application Number:
PCT/JP1998/005981
Publication Date:
July 13, 2000
Filing Date:
December 28, 1998
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
YOSHIOKA HIROSHI (JP)
International Classes:
F02M37/04; F02M37/08; F04D5/00; F04D29/18; F04D29/66; (IPC1-7): F02M37/10
Foreign References:
JPH06159283A1994-06-07
JPS6363756B21988-12-08
Attorney, Agent or Firm:
Miyata, Kaneo (Marunouchi 2-chome Chiyoda-ku Tokyo, JP)
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