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:
Dec. 29, 1992
Filed:
Jan. 22, 1992
Applicant:
Inventor:
Toshiyasu Ishizuka, Hamamatsu, JP;
Assignee:
Asmo Co., Ltd., Shizuoka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310154 ; 310192 ; 310256 ;
Abstract
A DC motor including a rotatable armature, a pair of permanent magnets functioning as magnetic stator poles, and a flat yoke having a pair of opposed arcuate sections and a pair of opposed flat sections, for receiving the armature. Each of the arcuate sections is formed with a slit extending parallel to the rotational axis of the armature to increase the magnetic reluctance. The magnetic reluctance against a magnetic flux generated by the cross magnetomotive force is increased to reduce the armature reaction by the slits.