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:
Dec. 09, 2003
Filed:
Aug. 06, 2001
Applicant:
Inventors:
Karl-Friedrich Diener, Gerolzhofen, DE;
Hermann-Josef Conraths, Schwabach, DE;
Werner Hopf, Oberasbach, DE;
Wolfgang Lienert, Nürnberg, DE;
Ekkehard Pittius, Roth, DE;
Peter Seitz, Pommelsbrunn, DE;
Assignee:
Siemens Aktiengesellschaft, München, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 4/902 ; H02K 9/00 ;
U.S. Cl.
CPC ...
H02K 4/902 ; H02K 9/00 ;
Abstract
The aim is to improve the cooling of a self-ventilated electric motor ( ). To this end, an electromagnetic speed limiting and governing device is provided between the motor shaft ( ) and the fan wheel ( ), the fan wheel, which is driven via an electromagnetic slip coupling ( ) in accordance with the motor speed, being mounted freely rotatably on the motor casing or on the motor bearing plate ( ).