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:
Nov. 09, 1982
Filed:
Jun. 23, 1980
Makoto Yoshida, Machida, JP;
Satoru Baba, Yamato, JP;
Aupac Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for manufacturing commutator for use in rotary electric machines, in which a shaping material prepared from electrically conductive metal powder material or a mixture of the metal powder material and additive powder material such as carbon, molybdenum disulfide, etc. is placed in a shaping mold and subjected to compression-molding into annular or cylindrical shaped electrically conductive body, then an electrically insulative synthetic resin material is coated around, or filled in, the hollow cavity of the annular or hollow cylindrical body, and thereafter this annular or cylindrical body is machined to be divided into a plurality of segments for constituting the commutator.