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:
Mar. 29, 1988
Filed:
Nov. 10, 1986
Applicant:
Inventors:
Masaaki Ikawa, Chiba, JP;
Kazuichi Mabuchi, Chiba, JP;
Assignee:
Mabuchi Motor Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310233 ; 29597 ; 310 42 ; 310 71 ; 310 72 ;
Abstract
A miniature motor having a plurality of commutator segments with commutator terminals which are connected to rotor windings. The commutator terminals are disposed on an insulating cylinder which is fixedly fitted to a motor rotating shaft, and a spark-quenching resistor connects each of the commutator segments. This resistor is a disc-shaped electrically conductive rubber ring which is fitted to the insulating cylinder so that the end face of the disc-shaped ring comes in contact with the commutator segment and commutator terminals and is brought into intimate contact with the commutator terminals by heating.