Fuel pump having impeller

Details Fuel pump having impeller Fuel pump having impeller

2011-05-31

2011-05-31

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

07950898

ABSTRACT:
A fuel pump includes a housing including an internally-large cylindrical portion coaxial with an internally-small cylindrical portion. A press-inserted portion is press-inserted to the internally-small cylindrical portion. An accommodating cylindrical portion is located in the internally-large cylindrical portion. An accommodating disc portion is opposed to the impeller. A cover is in contact with the accommodating cylindrical portion on the opposite side of the accommodating disc portion. The accommodating disc portion has an impeller-side surface abutted to the accommodating cylindrical portion via an accommodating corner. The outer circumferential periphery of the press-inserted portion has an axial end defining a press-inserted corner on the side of the accommodating cylindrical portion. The accommodating corner is distant from the press-inserted corner for a first distance. The outer circumferential periphery of the press-inserted portion has an axially center portion being distant from the impeller-side surface for a second distance.

REFERENCES:
patent: 5975843 (1999-11-01), Ebihara
patent: 6497552 (2002-12-01), Kobayashi et al.
patent: 6669437 (2003-12-01), Yu et al.
patent: 6890144 (2005-05-01), Yu et al.
patent: 2003/0118438 (2003-06-01), Usui et al.
patent: 2005/0163605 (2005-07-01), Oi

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