Kubota Corporation

Saburo Kadowaki

Tadao Yoshizawa

A pipe joint for connecting heterogeneous pipes is disclosed, wherein the one end, which is provided with a metallic male screw, forms a connecting portion with metallic wares, and the other end, which is molded of synthetic resin, constitutes another connecting portion with synthetic resinous goods. A nut-shaped tightener part, which is needed in time of the joint's being screw-connected with metallic pipe, is formed integrally with the metallic material which constitutes the male screw, being exposed high on the external periphery of the pipe joint, while the synthetic resinous material, which forms the synthetic resinous connecting portion, as being extended, is adhered all over the internal periphery of metallic material to be watertightened. The pipe joint is so constructed that the moment of rotation, which is acting on the nut-shaped tightener part, can be directly transmitted to the synthetic resinous material lest exfoliation of the metallic and the synthetic resinous materials should occur on coated surface of both of them when the male screw is to be screw-connected by making the nut-shaped tightener rotate, thereby leading both of them to integrated rotation.

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Sakai, Japan

Saburo Kadowaki