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:
Jan. 23, 1990
Filed:
Jan. 08, 1987
Applicant:
Inventor:
Kenji Tsuyama, Chiba, JP;
Assignee:
Mabuchi Motor Co., Ltd., Chiba, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310154 ; 310 / ; 310 51 ; 310 90 ; 310191 ; 310254 ;
Abstract
A miniature motor comprising a motor case having a bearing on the closed end face thereof, a stator consisting of a permanent magnet, brushes and terminals; and a rotor fixedly fitted to a motor shaft in the motor case and having core windings and a commutator; the rotor being rotatably supported by the bearing; in which the rotor and the stator are adapted so that the balance of magnetic field intensity between the stator and the rotor becomes unbalanced structurally or magnetically, thereby causing the rotor to be biased within the bearing in a predetermined positional direction with respect to the stator.