Denso Corporation

Tris Inc.

Shinya Nakagawa

Makoto Nishio

Youichi Murakami

Kenzo Kiyose

Takashi Fukutsuka

Kiyotoshi Oi

Yoichi Sakaura

Mitsuo Ikeda

Hirotake Hamamatsu

Ryoichi Honbo

Yuya Nishino

Ryouichi Honbo

A carbon brush for a fuel pump includes a brush body and a lead wire connected to the brush body, and the brush body has carbon and polyether ether ketone as main components. Abnormal wear does not occur even if a fuel pump motor is operated at a high voltage.

Carbon brush for fuel pump and method for manufacturing same

A segment of a carbon commutator includes a carbon layer on a surface side and a metallic carbon layer on a bottom side, and the carbon layer and the metallic carbon layer both contain a thermoplastic resin binder.

Carbon commutator and a method for production thereof

In a commutator of a rotary electric machine, each of commutator segments has a low-resistive layer made of a low-resistive material and a high-resistive layer made of a high-resistive material having a specific resistance higher than that of the low-resistive material. The low-resistive material contains a carbonic material and a binder. The high-resistive material contains a carbonic material, a binder and an inorganic substance such as boron nitride. A mixing ratio of the inorganic material to the high-resistive material is more than 20 wt %. Alternatively, a brush, which makes contact with the commutator segments, can have the high-resistive layer and the low-resistive layer.

Brush, commutator, and commutator device

Growing community of inventors

Matsusaka, Japan

Shinya Nakagawa