Tris Inc.

Denso Corporation

Other

Naoki Morita

Yoichi Sakaura

Mitsuo Ikeda

Takayoshi Otani

Masami Niimi

Yasuyuki Wakahara

Youichi Murakami

Kyoji Inukai

Osamu Takada

Toshio Ishikawa

Takahiro Sakamoto

Ryochi Honbo

A brush bodyof a metal-graphite brushis composed of a commutator side portionwhich contains graphite, copper and a metal sulfide solid lubricant, and a lead side portionwhich contains graphite and copper but does not contain any metal sulfide solid lubricant. A lead wireis attached to the lead side portioncontaining no metal sulfide solid lubricant.

Metal-graphite brush

A metal-graphite brush comprises a brush body which is made by mixing and molding metal powder and graphite powder. 2 mg to 30 mg as amounts of phosphate ion of at least one of phosphoric acid and a phosphate compound is added to 1 g of the brush body of the metal-graphite brush.

Ag particles produced by chemical reduction and having a mean particle size of 5 &mgr;m are added by 0.05-3 wt % and Zn are added by 2-10 wt % to a Pb-less brush body containing graphite, Cu and a metal sulfide solid lubricant of a metal-graphite brush.

Metal-graphite brush and production method thereof

A brush body of a metal-graphite brush is composed of a Pb-less commutator side portion which contains graphite, copper and a metal sulfide solid lubricant, and a lead side portion which contains graphite, copper, the metal sulfide solid lubricant and Pb.

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Matsusaka Mie, Japan

Naoki Morita