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:
Nov. 06, 2012
Filed:
Jun. 13, 2008
Yuzuru Suzuki, Nagano-ken, JP;
Takayuki Yamawaki, Nagano-ken, JP;
Hiroyuki Furusaki, Nagano-ken, JP;
Masaki Kagawa, Nagano-ken, JP;
Yuzuru Suzuki, Nagano-ken, JP;
Takayuki Yamawaki, Nagano-ken, JP;
Hiroyuki Furusaki, Nagano-ken, JP;
Masaki Kagawa, Nagano-ken, JP;
Minebea Co., Ltd., Nagano-Ken, JP;
Abstract
A PM stepping motor includes: a stator assembly composed of two stator units which are axially coupled to each other with a molding resin material, and each of which includes: inner and outer yokes each having a plurality of pole teeth; a bobbin including inner and outer flanges; and a coil wound around the bobbin, thus providing two such inner yokes, outer yokes, bobbins and coils in total; a rotor assembly which includes a shaft and a magnet, and which is rotatably disposed in the hollow of the stator assembly; and two bearings to rotatably support the shaft of the rotor assembly, wherein the two bobbins are formed of the molding resin material to be consolidated with the two inner yokes, and wherein a plurality of protrusions are formed of the molding resin material to extend integrally from the outer flange of each of the two bobbins.