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:
Mar. 20, 2007
Filed:
Feb. 12, 2003
Kunitake Matsushita, Shizuoka, JP;
Kunitake Matsushita, Shizuoka, JP;
Minebea Co., Ltd., Nagano-Ken, JP;
Abstract
A low-profile stepping motor is disclosed, which is preferably used in downsized and lower-profiled electronic devices, such as a printer, a facsimile, a floppy disk drive, and the like. The motor comprises a stator assembly composed of first and second stator units (A, B) , and a rotor assembly () rotatably disposes inside the stator assembly. The stator units (A, B) are shaped and structured identically with each other, and each structured such that upper and lower stator yokes () , which each have a plurality of pole teeth formed along one side, and which each have an exciting coil () disposed toward one side opposite to the one side having the pole teeth, are coupled to each other with their respective pole teeth intermeshing with each other with a shift of 180 degree electrical angle. The stator units (A, B) thus structured are joined to each other such that respective distal pole teeth adjacent to each other are shifted from each other by an electrical angle of either 90 or 270 degrees, and in this way the stator assembly is completed.