Pumps – Motor driven – Electric or magnetic motor
Patent
1993-12-06
1995-04-25
Bertsch, Richard A.
Pumps
Motor driven
Electric or magnetic motor
415 551, F04B 1700
Patent
active
054093570
ABSTRACT:
A fuel pump has a motor with a shaft extending therefrom and an impeller fitted thereon for pumping fuel from a fuel tank to an internal combustion engine. A pumping chamber, which encases the impeller, is comprised of a cover channel and a bottom channel formed in a pump cover and a pump bottom, respectively. The impeller has a plurality of radially extending vanes on an outer circumference separated by partitions of shorter radial length. The partitions are comprised of quarter-circle shaped arcuate portions extending from the outer circumference of the impeller to a straight portion having parallel sides, which preferably extend approximately 0.1 millimeters to 0.5 millimeters, to a flat top with rounded corners. Fluid active vane grooves thus formed circumferentially between the vanes and axially between the partitions which reduce fuel vortices angular acceleration within the pumping chamber thus increasing pump efficiency.
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Modern Plastics Encyclopedia, 1989, p. 133, Schleckser and Clarke.
Brockner Henry W.
Yu Dequan
Bertsch Richard A.
Ford Motor Company
Kelley David B.
Korytnyk Peter
May Roger L.
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