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. 17, 2010
Filed:
Feb. 01, 2008
Gary E. Horst, Manchester, MO (US);
Gary E. Horst, Manchester, MO (US);
Emerson Electric Co., St. Louis, MO (US);
Abstract
A stator assembly adapted for use in an external rotor electric motor. The assembly includes a stator core having a hub, a plurality of teeth extending radially outward from the hub, a root tooth diameter and an outer diameter. Each tooth has a root, a neck extending from the root and a head opposite the root. The neck has a maximum width. Each adjacent pair of teeth has a pitch measured at the roots of the corresponding teeth. The assembly includes a winding wrapped around each tooth of at least three teeth of the stator core. A ratio of the root tooth diameter of the stator core to the outer diameter of the stator core is less than about 0.75. A ratio of the maximum tooth neck width to the tooth pitch measured at the root of the teeth is greater than about 0.36.