Pumps – Motor driven – Electric or magnetic motor
Patent
1998-02-17
2000-05-30
Walberg, Teresa
Pumps
Motor driven
Electric or magnetic motor
F04B 1700
Patent
active
060684569
ABSTRACT:
An electric motor regenerative or turbine type fuel pump has a fuel pumping channel with a cross sectional area which decreases from adjacent its inlet to at least midway through the pumping channel to improve the efficiency and vapor handling capability of the fuel pump. Preferably, the pumping channel generally continuously decreases in cross-sectional area from its inlet to its outlet. In one form, the pumping channel is defined between a pair of plates or caps and a split ring received between the caps and surrounding an impeller having a plurality of vanes formed about its periphery and disposed within the pumping channel. Each of the caps preferably has a groove therein forming a portion of the pumping channel with each of the grooves having a greater cross sectional area adjacent the inlet of the pumping channel compared to the outlet of the pumping channel. In another form, a so-called side channel turbine pump, has a pumping channel defined by a groove in a flat face of a stator and a rotor driven to rotate by the motor has a circumferential array of vanes formed in a flat face and in communication with the pumping channel to develop increasing pressure from the inlet to the outlet of the pumping channel. This pumping channel has a greater depth and hence a greater cross sectional area adjacent its inlet as compared to its outlet.
REFERENCES:
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patent: 5486087 (1996-01-01), Treiber et al.
patent: 5702229 (1997-12-01), Moss et al.
Fournier Kirk D
Ross Joseph M
Tuckey Charles H
Fastovsky Leonid
Walberg Teresa
Walbro Corporation
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