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:
Jan. 06, 2004
Filed:
Jun. 05, 2002
Kyoji Inukai, Toyota, JP;
Youichi Murakami, Ama-gun, JP;
Etsuo Kokuryu, Chita-gun, JP;
Kenzo Kiyose, Takahama, JP;
Keizo Takeuchi, Handa, JP;
Tokio Hotta, Matsusaka, JP;
Yoichi Sakaura, Matsusaka, JP;
Kenichi Matsumoto, Matsusaka, JP;
Sinya Nakagawa, Matsusaka, JP;
Makoto Nisio, Matsusaka, JP;
Other;
Abstract
A sulfidation-resistant current-carrying member, such as a commutator, suitable for a direct-current motor in a fuel pump is provided. The current-carrying member for a direct-current motor in a fuel pump includes a commutator composed of a carbon layer having carbon as a principal component and forming a sliding surface at one end, and a metal carbon layer fixedly bound with the carbon layer at the other end and comprising 55 to 90 wt % of metal having brass as a principal component and a remaining portion having carbon as a principal component. By using brass as a primary metal component in the metal carbon layer, it is possible to achieve a commutator with superior resistance to sulfidation.