Toyota Jidosha Kabushiki Kaisha

Nippon Thermostat Co., Ltd.

Yoshinori Sato

Tadasu Tomohiro

Ryuji Kanzaka

The present invention is to provide a thermo-valve which can be operated with no unnecessary work to fill fluid easily and without fail into a circuit having the fluid flow therethrough at the time of a high temperature range. The thermo-valve comprises a valve housing, and a center guide shaftmovable to assume a valve movement limitation position GPin which a valve memberis retained to a second operation position BPto open a specific port, and a valve movement allowance position in which the valve memberis allowed to displace, the center guide shaftand the valve housingallowing a bimetal ringto be disposed therebetween, and the bimetal ring being deformed to retain the center guide shaftto the valve movement limitation position GPat the initial stage until the temperature of oil in the valve housingfirstly reaches the high temperature range, and to release the center guide shaftfrom the valve movement limitation position GPwhen the temperature of the oil in the valve housingreaches the high temperature range.

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Toyota, Japan

Yoshinori Sato