Denso Corporation

Taiho Kogyo Co., Ltd.

Takahiro Nozu

Masashi Suzuki

Youichi Murakami

Yoshihiro Adachi

Hiromi Yokota

Daisuke Yoshitome

Shingo Shimizu

Tetsuya Honda

Naruhiko Inayoshi

Hiroaki Hayakawa

An electrical contact device includes a high electric potential-side contact and a low electric potential-side contact having a lower electric potential than the high electric potential-side contact. The high electric potential-side contact and the low electric potential-side contact are configured to be brought into and out of contact with each other. At least one of the high electric potential-side contact and the low electric potential-side contact is formed of a low-boiling point material whose boiling point is lower than 2562&#xb0; C. or a mixed material that contains the low-boiling point material.

Electrical contact device and rotating electric machine including the electrical contact device

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

Growing community of inventors

Aichi, Japan

Takahiro Nozu