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. 19, 1978
Filed:
May. 20, 1974
Guenter Wrobel, Villingen, DE;
Papst-Motoren KG, , DE;
Abstract
An axially-flow fan motor structure of the type having an external rotor of a rotor stack and short-circuit rings, a stator structure and a rotor shaft with a fitting for connecting the external rotor for rotation about the stator structure, wherein the fitting is a flat metal sheet having anchoring elements about the peripheral edge extending at an angle .alpha. of less than 45.degree. with respect to the plane of the sheeet. Thus, by this structure, improvements in the fan efficiency can be effected, particularly since the anchoring elements can be further spaced from the rotor pack. A further improvement can be provided in this structure by the use of a shaded-pole stator wherein the coil structure dimensions, radially and axially, of the stator are confined within defined boundaries.