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:
Apr. 25, 1995
Filed:
Aug. 30, 1993
Masafumi Sakamoto, Kiryu, JP;
Akira Tozune, Hitachi, JP;
Japan Servo Co., Ltd., Tokyo, JP;
Abstract
A hybrid stepping motor in which each of two rotor yokes constituting a rotor is divided in its axial direction into at least two rotor yoke portions, the rotor yoke portions constituting one rotor yoke being made to abut on each other with their pole teeth shifted from each other in angular position by .theta..sub.0, the two rotor yoke portions belonging to the two rotor yokes respectively and sandwiching a permanent magnet therebetween being arranged with their pole teeth shifted from each other in angular position by 180/Nr degrees (.pi. radian in electric angle) under the condition that a relation of 0<.theta..sub.0 <90/Nr degrees is satisfied, and a rotor of a hybrid stepping motor in which two or more rotor units are arranged with their pole teeth shifted from each other in angular position by an angle smaller than 1/4 of the angular pitch with which the pole teeth are provided.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile