Tris Inc.

Denso Corporation

Other

Takayoshi Otani

Masami Niimi

Yasuyuki Wakahara

Youichi Murakami

Kyoji Inukai

Yoichi Sakaura

Mitsuo Ikeda

Naoki Morita

Takahiro Sakamoto

Osamu Takada

Toshio Ishikawa

Ryoichi Honbo

Hirotada Kanagawa

Masakiyo Shimada

Yukinobu Isoda

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 copper-zinc alloy powder of which zinc content is from 10 to 50 wt % and of which mean particle diameter is from 15 &#x3bc;m or under is added to a Pb-less brush body comprising graphite, copper and a metal sulfide solid lubricant of a copper-graphite brush.

Copper-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.

A metal-graphite brush has a copper-graphite brush body to which a metal sulfide solid lubricant is added and a lead embedded. Indium is at least added to an interface between the brush body and the lead in a concentration of 0.4-8 wt %.

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Ise Mie, Japan

Takayoshi Otani