Tokyo Gas Company Limited

Yasushi Kosugi

Toshio Saito

Shinichi Kanomata

Tetsuya Wada

Morio Saito

Keizou Ohkawa

A coupling for a corrugated pipe having ridges and grooves arranged alternately is disclosed. A body of this coupling has a through-hole whose one end is served as an inlet port. An annular accommodation recess and an annular retainer portion are formed on an inner periphery of the through-hole in this order toward the inlet port. A cylindrical support member is accommodated within the body. The support member is urged toward the inlet port by a spring. One end portion of the support member on the inlet port side is served as a receiving portion. An annular engagement member is mounted on an outer periphery of this receiving portion in such a manner as to be elastically enlarged in diameter. When the support member is pushed in a direction away from the inlet port against the spring by a distal end of the corrugated pipe inserted from the inlet port, the engagement member is disengaged from the receiving portion of the support member and reduced in diameter so as to be brought into engagement with an outer periphery of one of the grooves of the corrugated pipe. That part of the corrugated pipe, which projects from outer peripheries of the ridges of the corrugated pipe is retained by the retainer portion of the body while the engagement member is in engagement with the outer peripheries of the grooves.

Growing community of inventors

Tokyo, Japan

Yasushi Kosugi