Impeller and fluid pump having the same

Details Impeller and fluid pump having the same Impeller and fluid pump having the same

2006-11-08

2009-10-06

Nguyen, Ninh H (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Integrally shaped or blended into hub

C416S237000, C415S055100, C415S224000

Reexamination Certificate

active

07597543

ABSTRACT:
An impeller includes vane grooves arranged with respect to the rotative direction. At least the radially inner side of a back surface of each vane groove is radially outwardly inclined backwardly with respect to the rotative direction. The back surface has a radially inner end and a radially outer end, which are connected via a line segment. The line segment and a radius of the impeller define a backward inclining angle α therebetween. The back surface is inclined from a thickness center of the impeller toward each thickness-end of the impeller forwardly with respect to the rotative direction. The thickness-center and the thickness-end are connected via a line segment. The line segment and the thickness-center define a forward inclining angle β therebetween. The angle α, β satisfy the following relationships: 15°≦α≦30°; β≦60°; and 1≦β/α≦4.

REFERENCES:
patent: 5486087 (1996-01-01), Treiber et al.
patent: 6113363 (2000-09-01), Talaski
patent: 6132185 (2000-10-01), Wilhelm
patent: 6439833 (2002-08-01), Pickelman et al.
patent: 6454520 (2002-09-01), Pickelman et al.
patent: 2003/0118437 (2003-06-01), Takami et al.
Chinese Office Action dated Feb. 15, 2008 issued in counterpart Chinese Application 200610143938.4 with English translation.
KR Examination Report dated Sep. 10, 2007.
German Office Action dated Dec. 10, 2008 issued in corresponding German Application No. 10 2006 035 408.7-15, with English translation.

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