Tokyo Gas Company Limited

Threebond Co., Ltd.

Minoru Imamura

Hiroaki Kobayashi

Akira Kawase

Shigeru Toyoda

Seiichi Ikeda

Makoto Iwamura

Yoshitaka Kurosawa

Non-digging tube reverse lining engineering method of conduit

A tool for applying liquids has a nozzle portion which is provided with a spatulate section having a discharge orifice in the side thereof from which the liquid emerges. The spatulate section is mounted on a tool body which is freely rotatable, so that the liquid may be applied to the surface of a tubular object in a convenient manner.

Applicator tool for liquids

A method of locating a leak in a block of pipes comprises the filling of the pipe with inert gas and the sealing of the pipe. Thereafter, suction is applied to the pipe for drawing air or atmospheric gas into the pipe through the leak. Care is taken to insure that the block of pipes is sealed, except for the suction port and the leak position. Once a layer of air or atmospheric gas is established in the pipe near the leak position, inert gas is drawn from the pipe by the pump, in a direction toward an oxygen or atmospheric gas sensor. By doing this, the layer of air or atmospheric gas is moved along in the pipe from the leak position toward the oxygen sensor. A measurement is taken of the volume of gas being drawn while the layer of air or atmospheric gas is being moved along the pipe. The oxygen or atmospheric sensor indicates when the layer of air or atmospheric gas has arrived. This measurement is used in conjunction with a measurment of the volume that has been drawn from the block of pipes to give an accurate measurement of the position of the leak in the block of pipes.

Locating method of and the locating unit for leaks on piping

Growing community of inventors

Yokohama, Japan

Minoru Imamura