The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 11, 1993
Filed:
Sep. 23, 1991
Applicant:
Inventors:
Assignee:
M.I.M. Holdings Limited, , AU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
4151711 ; 4151701 ;
Abstract
An impeller for use in a centrifugal pump, the impeller including a plurality of vanes disposed intermediate a pair of spaced apart side walls, at least one of the side walls having a substantially smooth generally planar outer surface and a plurality of channels recessed into the surface, each of the channels spiralling progressively outwardly and rearwardly relative to an intended direction of rotation, and having a cross sectional flow area reducing substantially uniformly from a central region towards a respective rearwardly directed peripheral discharge port.