Denso Corporation

Tris Inc.

Other

Nippondenso Co., Ltd.

Nippon Soken, Inc.

Taiho Kogyo Co., Ltd.

Meijo University

Youichi Murakami

Kyoji Inukai

Masami Niimi

Yasuyuki Wakahara

Yoichi Sakaura

Mitsuo Ikeda

Takayoshi Otani

Naoki Morita

Takahiro Sakamoto

Kenzo Kiyose

Makoto Nishio

Ryoichi Honbo

Shinya Nakagawa

Osamu Takada

Masashi Suzuki

Yasuo Tabuchi

Mikio Matsuda

Motohiko Ueda

Junichi Ohguchi

Yoshio Miyata

Kiyotoshi Oi

Yuuichi Aoki

Hiromi Yokota

Hiroyasu Sakamoto

Manabu Saiki

Keizo Takeuchi

Shigeyoshi Sakuraba

Daisuke Yoshitome

Yousuke Yamagami

Yoshitaka Natsume

Hiroyasu Kanamori

Hirotake Hamamatsu

Naruhiko Inayoshi

Toshitada Nagasawa

Tokio Hotta

Toshio Ishikawa

Hirotada Kanagawa

Hiroaki Hayakawa

Takahiro Nozu

Hatsuhiko Usami

Takashi Fukutsuka

Yoshio Satou

Ryouichi Honbo

Takashi Honda

Kouichi Nagaya

Makoto Nisio

Sinya Nakagawa

Etsuo Kokuryu

Kenichi Matsumoto

Ryochi Honbo

Nobuyuki Yamashita

Hiroaki Kawamura

Teruo Kobayashi

Shouzou Tatematsu

Masakiyo Shimada

Yukinobu Isoda

A recess, which has a bottom, is formed in at least one of a contact surface of a rotor and a contact surface of an armature. A solid material, which is made of thermoset resin that contains powder of metal oxide or metal dispersed in the thermoset resin, is formed in an inside of the recess.

Clutch

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

In a Cu&#x2014;Bi based sintered alloy, to which hard particles, such as FeP, are added, the main constituent components of the microstructure are a Cu matrix, Bi phase and the hard particles. In the sintering method of the present invention, the flow of the Bi phase is suppressed to as low level as possible. The novel structure is that the contact between the Bi phase and hard particles is kept to a low ratio. A lead-free bearing used for a fuel injection pump according to the present invention contains from 1 to 30 mass % of Bi and from 0.1 to 10 mass % of hard particles having from 10 to 50 &#x3bc;m of the average particle diameter, the balance being Cu and unavoidable impurities. The properties of the main component phases are utilized at a high level such that the sliding properties are equivalent to those of a Pb containing Cu-based sintered alloy.

Pb-free bearing used for fuel-injection pump

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

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.

In a multilayer brush composed chiefly of copper and graphite and incorporated therein with a solid lubricant, which consists essentially of two types of brushes, a high-copper-content part brush containing the copper in a large quantity and a low-copper-content part brush containing the copper in a small quantity, at least the high-copper-content part brush contains zinc in an amount of from 0.1% by weight to 5% by weight, and the zinc and the copper form an alloy. This can provide a multilayer brush having a superior durability, which can prevent the performance of motors from lowering, without use of the harmful substance such as lead, and may less undergo any wear due to mechanical and electrical sparkling of the brush.

Multilayer 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 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 %.

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.

Current-carrying member for a direct-current motor in a fuel pump, method for producing the same, and fuel pump

A valve body of a spill valve is constructed of steel having a martensitic structure and a needle constructed of steel in which hard particles are dispersed in a matrix having a martensitic structure. A hardness difference between the matrix and the hard particles is equal to or smaller than 1000. By reducing the difference in hardness between the matrix and the hard particles of the needle, projections and detachment of hard particles are prevented. Accordingly, the wear of the matrix and valve body resulting from exposed hard particle is precluded while ensuring hardness of the valve.

Valve apparatus

A power transmission apparatus which can function as a torque limiter during an overload condition. A Belleville spring is provided for generating mutual frictional engagement in areas between a flange part integral to an inner holder member, a washer, arc shaped projections of a flange part of a hub and a washer. As a result, during a normal condition of a compressor, the rotating movement of the inner holder member located adjacent to the rotating movement source is transmitted via the frictional engagement mechanism to a hub and then to a rotating shaft. Contrary to this, during an overloaded condition, a slippage is generated in the area between the washer and the arc shaped projections of the flange part of the hub as a frictional engaging area of a lower coefficient of friction. This slippage causes the washer to sink into the recess of the hub, which causes the washer to be displaced in the direction of the axis of the rotating shaft, which causes the pressing force to be reduced in the Belleville spring, resulting in a free rotating movement of the flange part.

Power transmission apparatus

An electroconductive composite material composed of a three-dimensional continuum of a porous metal with the pores filled with graphite and a resin, having a good heat resistance, wear resistance, strength and thermal conductivity, having a light weight, and particularly useful as electric armature brushes and other electric sliding elements. A process of producing the composite material comprises the steps of: filling pores of a three-dimensional continuum of a porous metal with a pasty mixture composed of graphite, a binder, and a solvent; treating the continuum for volatilization of the solvent; and then, forming and heating the continuum.

Composite material and process of producing same

Growing community of inventors

Aichi, Japan

Youichi Murakami