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:
Apr. 26, 1977
Filed:
Aug. 08, 1975
Applicant:
Inventors:
Hans-Dieter Knopfel, Frankenthal, DT;
Heinz-Bernd Matthias, Frankenthal, DT;
Assignee:
Klein, Schanzlin & Becker Aktiengesellschaft, Frankenthal, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
415143 ; 415D / ;
Abstract
A centrifugal pump wherein the inducer in front of the impeller is a propeller and has a hub whose rear end face, which is immediately adjacent to the front end portion of the impeller, has a circumferential groove. When the pump is in operation, especially in the partial load range, the customary turbulence develops in the groove so that it does not interfere with the flow of fluid from the intake into the impeller. This reduces the tendency of fluid to pulsate with attendant reduction of noise.