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. 01, 2010
Filed:
Nov. 30, 2006
Masayuki Yokoyama, Tokyo, JP;
Youichi Fujita, Tokyo, JP;
Sotsuo Miyoshi, Tokyo, JP;
Naohiro Oketani, Tokyo, JP;
Masayuki Yokoyama, Tokyo, JP;
Youichi Fujita, Tokyo, JP;
Sotsuo Miyoshi, Tokyo, JP;
Naohiro Oketani, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
In a DC-motor according to the present invention, contact areas of first brushes can be enlarged without enlarging the external diameter of a disk on which a commutator is provided; therefore, the wear resistance of the first brushes can be enhanced while maintaining a good control-response; and at the same time, the axial dimension can be shortened dramatically, so that the DC-motor can be downsized. The first brushesare radially in contact with the commutator, and second brushesare axially in contact with slip ringsthat are formed circumferentially inside the commutator