Pumps – Motor driven – Electric or magnetic motor
Patent
1990-11-08
1992-03-17
Bertsch, Richard A.
Pumps
Motor driven
Electric or magnetic motor
4174235, 41742314, 417244, 417203, F04B 300, F04B 3504, F04B 2314
Patent
active
050963910
ABSTRACT:
A fuel delivery system for automotive engine and like applications that includes a canister for positioning within a fuel tank having a lower end with a fuel opening, and an internal wall spaced from such lower end dividing the canister into upper and lower fuel chambers. An electric-motor fuel pump is positioned within the upper chamber, and has a fuel inlet within the upper chamber, a fuel outlet for feeding fuel under pressure to an engine, and a rotary output shaft extending toward the canister wall. An impeller pump is positioned within the lower chamber and is coupled to the output shaft of the electric-motor pump in the upper chamber for pumping fuel from the lower chamber to the upper chamber. The impeller is coupled to the pump output shaft by a flexible coupling in the form of a coil spring. A check valve at the outlet of the impeller pump prevents return flow of fuel from the upper chamber to the lower chamber when the electric-motor pump is de-energized.
REFERENCES:
patent: 2254566 (1941-09-01), Cornell
patent: 2514394 (1950-07-01), Irving
patent: 3443519 (1969-05-01), White
patent: 4865522 (1989-09-01), Radermacher
patent: 4998865 (1991-03-01), Nalzanishi et al.
Basichas Alfred
Bertsch Richard A.
Walbro Corporation
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