Impeller and apparatus using the same

Details Impeller and apparatus using the same Impeller and apparatus using the same

2007-10-23

2007-10-23

Edgar, Richard A. (Department: 3745)

Rotary kinetic fluid motors or pumps

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

Turbine regenerative pump

C416S203000

Reexamination Certificate

active

11290417

ABSTRACT:
An impeller rotates for pressurizing fluid in a pump passage. The impeller includes an inner circumferential portion and an outer circumferential portion. The outer circumferential portion has two axial end surfaces that respectively have a plurality of vane grooves arranged in a rotative direction of the outer circumferential portion. A plurality of communication holes axially penetrates one of the inner circumferential portion and the outer circumferential portion. The plurality of communication holes is displaced from the plurality of vane grooves in a radial direction of the outer circumferential portion. The plurality of communication holes is arranged substantially along the rotative direction of the outer circumferential portion at nonuniform pitches.

REFERENCES:
patent: 6471466 (2002-10-01), Marx et al.
patent: 6767179 (2004-07-01), Kusagaya et al.
patent: 2003/0026685 (2003-02-01), Takagi et al.
patent: 2003/0026686 (2003-02-01), Kusagaya et al.
patent: 2004/0223841 (2004-11-01), Yu et al.

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