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. 23, 1987
Filed:
Dec. 05, 1985
Applicant:
Inventor:
Koki Isozaki, Kiryu, JP;
Assignee:
Japan Servo Co., Ltd., Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310 / ; 310156 ; 310168 ;
Abstract
A permanent magnet type stepping motor wherein number of magnetic poles provided radially on the inside periphery of a stator is 16, number of pole teeth provided on a rotor poles is (z) (wherein z=16 m.+-.4; (m) denotes a positive integer), 14 poles among 16 have pitch of (22.5.-+.45/z).degree. between their own pole teeth and corresponding pole teeth of adjacent poles and other two poles have pitch of (22.5.+-.315/z).degree. between their own pole teeth and corresponding pole teeth of adjacent poles.