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. 08, 2014
Filed:
May. 08, 2009
Applicants:
Jan Caroe Aarestrup, Bjerringbro, DK;
Keld Folsach Rasmussen, Ans, DK;
Inventors:
Jan Caroe Aarestrup, Bjerringbro, DK;
Keld Folsach Rasmussen, Ans, DK;
Assignee:
Grundfos Management a/s, Bjerringbro, DK;
Primary Examiner:
Int. Cl.
CPC ...
F04B 17/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a centrifugal pump assembly with an electric drive motor and with a control device having a frequency converter, for the control of the rotational speed of the drive motor, wherein the control device is designed in a manner such that in at least one control region, a field weakening is produced in the drive motor, by way of which the rotational speed of the drive motor is increased.