Nhk Spring Co., Ltd.

Fcc, LLC

Ichiro Sasuga

Noritoshi Takamura

Masaru Inoue

Michiya Masuda

Ken Suzuki

Nobuharu Kato

Jun Tokumasu

Kenjiro Kawanabe

Kazuhiro Itonaga

Yutaka Nishida

Kengo Tsurugai

The pressure unit includes a spring member that is formed into a coil form obtained by winding a wire rod and that has a periodically changing pitch angle and a housing member to which end portions of the spring member are attached, and the pressure unit pressurizes a semiconductor stacked unit obtained by alternately stacking a semiconductor element module and a cooling tube that makes contact with the semiconductor element module and cools the semiconductor element module.

Pressure unit

Blind device

A compression coil spring is used as a return spring which is stored in the housing of a clutch to urge the clutch piston in its returning direction. The effective number of turns of the compression coil spring is two or less, and the number of turns at an end-turn portion thereof is more than 0.45 and not more than 0.7. The compression coil spring is used in the compressed state throughout the operating stroke of the clutch piston. The number of turns at the end-turn portion is desirably within the range of 0.5 to 0.65, more desirably within the range of 0.55 to 0.62.

Return spring for clutch

Growing community of inventors

Kanagawa, Japan

Ichiro Sasuga