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:
Aug. 15, 2006
Filed:
Dec. 11, 2003
Francisco Rojo Lulic, St. Georgen, DE;
Francisco Rojo Lulic, St. Georgen, DE;
ebm-papst St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
An external rotor motor, suitable for driving a cooling fan, has a structure which facilitates automated assembly with proper angular registration. The rotor has a central shaft which is rotatably supported inside a bearing support tube having a tapered outer surface formed with a circumferential stop and longitudinal guide grooves. An inner stator structure is located radially between the bearing support tube and the rotor. The stator has an internal recess containing a securing ring or disk with inwardly extending tabs. During assembly of the inner stator onto the bearing support tube, the tabs slide in the guide grooves, then bend to form barbs which engage into the outer surface of the bearing support tube, thereby securing the stator on the bearing support tube in a predefined angular orientation. The circumferential stop assures insertion of the bearing support tube to the correct depth.