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:
Sep. 03, 2002
Filed:
Aug. 29, 2000
Applicant:
Inventor:
Helmut Nather, Bad Camberg, DE;
Assignee:
Mannesmann VDO AG, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 1/500 ;
U.S. Cl.
CPC ...
F04B 1/500 ;
Abstract
In an impeller of a feed pump designed as a side channel pump, each of the vane chambers are divided into two sectors which are arranged in an undercut-free design relative to a direction perpendicular to the end face of the impeller. When the impeller is manufactured from plastic by injection molding, the sectors may be produced by projections arranged on mold halves intended for the manufacture of the impeller. After the production of the impeller, the projections in the mold halves having the geometric shape of the sectors may be drawn axially apart from one another in one simple step, thereby providing a cost-effective production of the impeller.