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:
Jun. 21, 2016
Filed:
May. 03, 2011
Applicant:
Poul Anton Daugaard, Kolding, DK;
Inventor:
Poul Anton Daugaard, Kolding, DK;
Assignee:
ALFA LAVAL CORPORATE AB, Lund, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D 7/04 (2006.01); F04D 29/22 (2006.01);
U.S. Cl.
CPC ...
F04D 7/045 (2013.01); F04D 29/2288 (2013.01);
Abstract
A centrifugal pump that includes a casing in which an impeller is arranged. The impeller has a back side that faces a back plate of the centrifugal pump, and one or more vanes for pumping the fluid. The back side of the impeller includes a segmented scraper for scraping from the back plate material that has been deposited from the fluid. The segmented scraper includes multiple protrusions, wherein each protrusion of the multiple protrusions is facing the back plate, and an aggregated radial extension of the protrusions equals a radius of the impeller within an interval of ±10%, ±25% or even up to ±40%.