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:
Apr. 28, 1998
Filed:
Apr. 18, 1996
Applicant:
Inventors:
Mineo Yamaguchi, Kosai, JP;
Takayuki Kitagawa, Toyohashi, JP;
Assignee:
ASMO Co., Ltd., Kosai, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ; H02P / ;
U.S. Cl.
CPC ...
310248 ; 310245 ; 310251 ; 310252 ;
Abstract
A brush structure for a motor is provided for realizing an equalization of wear of brushes without causing an early wear of a specific brush while not necessitating a complicated conduction controlling device. A first brush, which is one of four brushes, conducted at both Lo mode and Me mode is formed to have a larger sliding contact area for contacting a commutator slidably compared with a sliding contact area of a second brush which is conducted at Hi mode only. Current density in the first brush at Lo mode and Me mode becomes smaller than current density at Hi mode.