Abstract: The present invention relates to a method and an apparatus for cleaning a pipe. The apparatus is constructed by connecting a grinding device which has an election pipe which is connected to an abrasive material supplying hose and ejects the abrasive material against the inner surface of the pipe, an electric motor for rotating the ejection pipe, a video signal device having a television camera, and an ejection device connected to a dust discharge air supplying hose for ejecting the air forwardly, in the stated order and in a line so as to be passed through the pipe. The apparatus is advanced in the pipe by pulling on the abrasive material supplying hose and is able to be moved rearwardly by pulling on the dust discharge air supplying hose.

Abstract: A mechanism for lifting and lowering a magnetic head into and out of contact with a magnetic medium such as a magnetic sheet includes at least one guide shaft rotatably supported on a frame and having an eccentric portion. A magnetic head carriage supports a magnetic head thereon and is slidably movable along the guide shaft toward a recording/playback position, the magnetic head carriage having an end held in engagement with the eccentric portion of the guide shaft. A driver mechanism is mounted on the frame for rotating the guide shaft to cause the eccentric portion to displace the magnetic head toward a backing plate with a magnetic medium such as a magnetic sheet interposed therebetween.

Abstract: The present invention relates to a cleaning apparatus for a pipe which comprises at least one scraping device having a plurality of scraping segments which are made of elastic metal plates and are radially elongated around an axis of the scraping device, and a grinding device which is connected behind the scraping device and has an ejection pipe which is rotatably supported by a tubular member and has at least one radially elongated portion having a nozzle at radially outer end thereof. The grinding device also has an electric motor for rotating the ejection pipe. The cleaning apparatus also has a hose which is connected behind the tubular member for supplying mixed flow of abrasive material and compressed air into the ejection pipe, and driving means for advancing the scraping device, the grinding device and the hose.

Abstract: The present invention relates to a lining apparatus for a pipe having a plurality of constitutive elements which are connected to each other in a line and include as a whole at least one driving means for moving the apparatus in the pipe, a pair of tanks for containing respective paint materials such as main material and hardener, a pair of feeding devices for feeding the respective paint materials, and a paint injecting device for making paint by mixing the paint materials fed by the feeding devices and injecting the paint to the interior surface of the pipe. The paint injecting device has a hollow rotary injector which is rotated by a driving means and has at least one radially elongated portion forming a nozzle at outer end thereof. The radially elongated portion of the rotary injector has a plurality of guide plates inside thereof for mixing the paint materials passing therethrough.

Abstract: In a reviving apparatus for a fluid passage has a device for passing fluid through the fluid passage, at least one rotational flow making device for making rotational flow of the fluid, and at least one reviving material supplying device for supplying of reviving material so as to be carried by the fluid made rotational flow thereof, the rotational flow making device has a discharge pipe which is to be connected to one end of the fluid passage at outlet end thereof, a fluid chamber which surrounds the inlet end of the discharge pipe and has an inlet portion of the fluid, and a plurality of nozzles which are elongated from the fluid chamber into the dischage pipe through the wall of the discharge pipe so as to be inclined in the same rotational direction around the axis of the discharge pipe.