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:
Jan. 30, 2018
Filed:
Mar. 29, 2012
Applicants:
Steen Mikkelsen, Bjerringbro, DK;
Aage Bruhn, Bjerringbro, DK;
BO Møller Jensen, Viborg, DK;
Inventors:
Assignee:
Grundfos Management a/s, Bjerringbro, DK;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D 9/00 (2006.01); F04D 1/06 (2006.01); F04D 13/10 (2006.01); F04D 9/02 (2006.01);
U.S. Cl.
CPC ...
F04D 9/005 (2013.01); F04D 1/063 (2013.01); F04D 9/02 (2013.01); F04D 13/10 (2013.01);
Abstract
A multi-stage centrifugal pump assembly includes at least two impellers () and two impeller groups () which are consecutive in a flow direction and each with at least one impeller (). A backflow channel () connects an exit side of the first impeller group () to an entry side thereof is located in a first impeller group () of the two impeller groups ().