Aisin Aw Co., Ltd.

Hideji Kato

Takao Taniguchi

Kazumasa Tsukamoto

Fumitomo Yokoyama

Takeshi Hara

Kouji Ohbayashi

Naohisa Momiyama

Michio Maruki

Yoshimi Watanabe

Masataka Shimazaki

Masayoshi Imakire

A lockup clutch for torque converter which prevents engaging and disengaging shock when a transmission torque suddenly changes, includes a lockup clutch assembly, a lockup clutch piston operating the lockup clutch assembly, and a damper device disposed between the lockup clutch piston and an output member for absorbing changes of transmission torque occurring in association with the operation of the lockup clutch assembly. The lockup clutch piston is made of steel and has a thermally treated portion placed at a surface in contact with springs of the damper device wherein the thermally treated portion is hardened by rapid local melting with high density energy radiation such as electron beam followed by rapid cooling.

Lockup clutch for a torque converter and method of thermally treating a

Discloses a torque converter device with a light stator and turbine. The torque converter device comprises a converter cover, a turbine hub, a washer provided between the cover and the hub, and an oil flow passage provided between the washer and the turbine hub to lighten the stator.

Torque converter device with lubricating washer on turbine hub

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Okazaki, Japan

Hideji Kato