Automotive fuel pump with pressure balanced impeller

Details Automotive fuel pump with pressure balanced impeller Automotive fuel pump with pressure balanced impeller

2007-05-15

2007-05-15

Kershteyn, Igor (Department: 3745)

Rotary kinetic fluid motors or pumps

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

Turbine regenerative pump

C415S055200

Reexamination Certificate

active

11305901

ABSTRACT:
A rotary fuel pump employs pressure balancing features on the non-vaned side of the impeller to provide localized application of fluid forces so that the impeller is more precisely balanced within the pumping chamber. A generally disc-shaped impeller body has an impeller with a body-side surface and a cover-side surface. The cover-side surface defines an impeller flow channel extending circumferentially around the impeller. The impeller includes a plurality of vanes positioned at least partially within the impeller flow channel. The body-side surface has a plurality of discontinuous undercut regions each coaxially aligned with at least a portion of the impeller flow channel. The impeller has a plurality of apertures wherein each aperture connects the impeller flow channel with a respective undercut region, whereby pressure forces against the impeller from the fuel are substantially balanced in the axial direction.

REFERENCES:
patent: 5472321 (1995-12-01), Radermacher
patent: 6019570 (2000-02-01), Talaski
patent: 6102653 (2000-08-01), Marx
patent: 6299406 (2001-10-01), Yu et al.
patent: 6604905 (2003-08-01), Yu et al.
patent: 6669437 (2003-12-01), Yu et al.
patent: 6739844 (2004-05-01), Yu et al.

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