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:
Jun. 17, 2003
Filed:
Sep. 19, 2001
Applicant:
Inventors:
Assignee:
Wellington Drive Technologies Limited, Auckland, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H20K 7/06 ; H20K 1/00 ; H02K 1/22 ;
U.S. Cl.
CPC ...
H20K 7/06 ; H20K 1/00 ; H02K 1/22 ;
Abstract
A discoidal brushless DC motor having a stator ( ) carrying windings ( ) arranged in slots which radiate out from the center of the stator to the periphery. The depth of each slot increases towards the center of the stator. The slot, therefore, is wider (from side to side) and shallower towards the periphery of the stator, and narrower (from side to side) and deeper towards the center of the stator. This arrangement ensures that the windings are contained below the surface ( ) of the stator ( ). The magnetic circuit includes a backing of a ferromagnetic material ( ). This ferromagnetic material ( ) can be a watch spring core made from a long strip of soft iron tape.