Fuel pump

Details Fuel pump Fuel pump

2006-04-11

2006-04-11

Nguyen, Ninh H. (Department: 3745)

Rotary kinetic fluid motors or pumps

With means for re-entry of working fluid to blade set

Turbine regenerative pump

Reexamination Certificate

active

07025561

ABSTRACT:
Mass-produced fuel pumps having a stable pump efficiency comprising a circumferential groove20is formed within a pump body15and the groove20is divided into a first region having a constant cross-sectional area L, a second region having a cross sectional area that gradually becomes smaller toward the downstream side, and a third region having a constant cross-sectional area M. A suction hole22is formed within the pump body15and is inclined toward the rotational direction of the impeller. The suction hole22is communicated with the groove20in the first region. Even if the inclination angle of the suction hole22varies among mass-produced fuel pumps, the cross-sectional area L of the groove20is constant at the location where the suction hole22is communicated with the groove20. Therefore, variations in the amount of fuel sucked into the fuel pump can be reduced. Accordingly, pump efficiency of the mass-produced fuel pumps can be stabilized.

REFERENCES:
patent: 5486087 (1996-01-01), Treiber et al.
patent: 5551835 (1996-09-01), Yu et al.
patent: 6068456 (2000-05-01), Tuckey et al.
patent: 44 18 640 (1994-12-01), None
patent: 196 43 728 (1998-04-01), None
patent: 197 57 580 (1999-07-01), None
patent: 08-014184 (1996-01-01), None
U.S. Appl. No. 10/808,638, unpublished, Honda et al.
U.S. Appl. No. 10/851,732, unpublished, Ikeya.

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