Ashimori Kogyo Kabushiki Kaisha

Tokyo Gas Kabushiki Kaisha

Shinji Shimokawa

Akio Morinaga

Katsuaki Zenbayashi

Katsuo Kita

Osamu Toyoshima

Hisao Otsuga

An apparatus for blocking the openings of a branched pipe (2) in a branched portion of a pipeline (1) prior to lining the inner surface of the pipeline (1) with a tubular lining material (100) for maintenance/repair or reinforcement purposes includes a spring-biased plug-housing assembly which carries a plurality of plugs for blocking the branch pipe openings. The plugs are installed one at a time into the branch pipe openings and are retained in the openings by a friction fit. The plug-housing assembly dispenses one plug at a time without the possibility of inadvertent dispensing of the remaining unused plugs. The plugs have cut-away portions in the outer periphery thereof, which cut-away portions cooperate for storage and installation purposes with struts on the plug-housing assembly.

Plug for blocking a branched pipe opening

Boring device for opening passages to branch portions of a lined main

Growing community of inventors

Osaka, Japan

Shinji Shimokawa