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:
May. 05, 2015
Filed:
Mar. 17, 2011
Gunter Streng, Schrozberg, DE;
Walter Hofmann, Mulfingen, DE;
Gunter Streng, Schrozberg, DE;
Walter Hofmann, Mulfingen, DE;
Abstract
A fan () consisting of an electric external rotor motor () and of a fan wheel (), the external rotor motor () consisting of a stator () encapsulated with an insulating material (), and a rotor () carrying the fan wheel () enclosing the stator () in a pot-shaped manner. The rotor () having ventilation openings in a front wall (). The stator () having projecting fins () on a front area () arranged and distributed over the circumference which is opposite the ventilation openings (). A gap () between a circumferential rim () of the rotor () opposite the front wall () and a stator carrier () forms a passage for a cooling air current flowing around the stator () during operation. During operation, the cooling air is swirled intensively between the ventilation openings () and the projecting fins () for cooling the motor.