Hitachi Metals, Ltd.

Tokyo Gas Company Limited

Sankoh Co., Ltd.

Takaaki Inotani

Yoshinori Yoshida

Tomoyuki Minami

Fumitaka Satoh

Tamaki Hamaguchi

Satoru Araki

Youichi Uchiumi

Takashi Toku

Takuji Okiayu

Akihiro Hattori

Makoto Ibayashi

Fumikazu Ishibe

A pipe joint includes a hollow joint main body; a nut that is screwed into the joint main body; a seal member that is mounted to inside of the joint main body; and a retainer that is placed between the joint main body and the nut and comprises a pawl portion engaged with a trough of a metal flexible pipe in a coupled state and a retainer locking portion caught and locked inside of the joint main body in the coupled state.

Pipe joint

A pipe joint comprising a pressing nut into which a flexible pipe is inserted, a joint body into which the pressing nut is partially inserted, a resilient means unlocked when pushed by a tip end of the flexible pipe, a sealing member, a retainer engaging the flexible pipe, and an engaging mechanism keeping the pressing nut at a predetermined position in the joint body; the engaging mechanism comprising a stop ring, an annular groove formed on an outer surface of the pressing nut for receiving the stop ring, pluralities of engaging grooves formed on an inner surface of the joint body for receiving the stop ring and communicating with each other; the stop ring engaging both of the annular groove and the first engaging groove before the connection of the flexible pipe is completed; and when the flexible pipe is pulled after completing the connection, the stop ring moving from the first engaging groove to the second engaging groove to draw the pressing nut from the joint body, so that the normal connection of the flexible pipe can be confirmed.

Growing community of inventors

Kuwana, Japan

Takaaki Inotani