Circumferential flow pump

Details Circumferential flow pump Circumferential flow pump

2006-10-24

2006-10-24

Kershteyn, Igor (Department: 3745)

Rotary kinetic fluid motors or pumps

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

Turbine regenerative pump

C415S055500

Reexamination Certificate

active

07125218

ABSTRACT:
Each of impeller grooves of an impeller has a first bow surface that extends from one end surface of the impeller so as to have a radius R1, a second bow surface that extends from the other end surface of the impeller so as to have a radius r1, and a projected partition wall having a connecting surface that connects the first and second bow surfaces. A pump cover and a pump base are provided adjacent to the respective end surfaces of the impeller, and are formed with respective annular feed passages that are defined by semicircular wall surfaces having radii R2and r2, respectively. The radii R1and r1of the first and second bow surfaces are set longer than the radii R2and r2of the semicircular wall surfaces, respectively.

REFERENCES:
patent: 5328325 (1994-07-01), Strohl et al.
patent: 5372475 (1994-12-01), Kato et al.
patent: 5904468 (1999-05-01), Dobler et al.
patent: 6102653 (2000-08-01), Marx
patent: 6481958 (2002-11-01), Wilhelm et al.

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