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:
May. 31, 1988
Filed:
Feb. 24, 1987
Applicant:
Inventors:
Takashi Watanabe, Hitachi, JP;
Masao Ohi, Mito, JP;
Koji Tanaka, Hatachi, JP;
Yoshio Takikawa, Hitachi, JP;
Yasuto Kondoh, Hitachi, JP;
Satoshi Oouchi, Hitachi, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Service Eng., Co. Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310249 ; 310220 ; 310239 ;
Abstract
A current-collecting brush apparatus is disclosed in which brushes are held slidably on a brush holder and pressed against a rotor by a brush-pressing spring. Pigtails connected to supply current to the brushes comprise a plurality of spiral conductors in parallel which are connected by being coiled in mutual opposite directions to offset the magnetic fluxes generated therein.