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:
Jul. 02, 2019
Filed:
Apr. 29, 2014
Applicant:
Grundfos Holding A/s, Bjerringbro, DK;
Inventors:
Bjarne Vinther Toft, Randers SV, DK;
Aage Bruhn, Bjerringbro, DK;
Assignee:
GRUNDFOS HOLDING A/S, Bjerringbro, DK;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D 1/10 (2006.01); F04D 1/06 (2006.01); F04D 9/00 (2006.01); F04D 9/02 (2006.01); F04D 13/06 (2006.01); F04D 15/00 (2006.01); F04D 29/043 (2006.01); F04D 29/22 (2006.01); F04D 29/42 (2006.01); F04D 29/44 (2006.01); F04D 29/70 (2006.01);
U.S. Cl.
CPC ...
F04D 1/10 (2013.01); F04D 1/063 (2013.01); F04D 9/003 (2013.01); F04D 9/02 (2013.01); F04D 13/06 (2013.01); F04D 15/0011 (2013.01); F04D 29/043 (2013.01); F04D 29/22 (2013.01); F04D 29/426 (2013.01); F04D 29/445 (2013.01); F04D 29/70 (2013.01);
Abstract
A multi-stage, self-priming centrifugal pump assembly includes at least two pump stages () which are consecutive in a main flow direction (), and a backflow channel () which lies parallel to at least one a pump stage (). The backflow channel () runs out downstream of the first or a further pump stage (), in the main flow direction ().