Pumps – Motor driven – Including means utilizing pump fluid for augmenting cooling,...
Patent
1994-11-18
1997-01-14
Thorpe, Timothy
Pumps
Motor driven
Including means utilizing pump fluid for augmenting cooling,...
41742314, 4174104, 123509, F04B 3906
Patent
active
055932878
ABSTRACT:
A fuel pump wherein the inner cylinder 37 for forming the fuel duct 38, in the outer cylinder 14, is provided between the stator 34 and the rotor 32 of the brushless motor 12, one end portion of the inner cylinder 37 is blockaded by the holder plate 41. The contacting pipe 44 for connecting from the fuel duct 38 to the delivery duct 21 is protrudely provided at the holder plate 41, and the control circuit unit 13 of the brushless motor 12 is held thereon. A resin sealed portion 52 is formed between the outer cylinder 14 and the inner cylinder 37, and the circumference of the control circuit unit 13 in the inner cylinder 37 by a potting method. The fuel 54 is lead from the introductory duct 16 to the fuel duct 38 of the inner cylinder 37, and is delivered from the delivery duct 21 through the insides of the fuel duct 38 and the contacting pipe 44. Since the fuel 54 does not contact on the resin sealed portion 52 and the control circuit unit 13, it is possible to prevent electric corrosion, conduction and a short of the resin sealed portion 52 and the control circuit unit 13 by the fuel 54.
REFERENCES:
patent: 3801231 (1974-04-01), Nusser et al.
patent: 3897179 (1975-07-01), Fussner et al.
patent: 5015159 (1991-05-01), Mine et al.
patent: 5356272 (1994-10-01), Nagata et al.
patent: 5361742 (1994-11-01), Briggs et al.
patent: 5454697 (1995-10-01), Nakanishi
Honma Bunji
Iwamoto Hideyuki
Sadakata Nobuyasu
Shindo Yoichi
Yomoda Akira
Korytnyk Peter G.
Mitsuba Electric Manufacturing Co. Ltd.
Thorpe Timothy
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