Patents by Inventor Yoshifumi Osaka

Yoshifumi Osaka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Boring device for lining material in branched portions of lined conduit
    Patent number: 5197540
    Abstract: The present invention relates to a boring device adapted to bore the lining material blocking a branched portion where there is an opening for connecting a main pipeline with a branched pipeline (33), after the inner surface of a pipe (31), such as a gas conduit, a city water conduit or a sewerage pipe, in particular, a conduit buried in the ground, has been lined with lining material (30) for maintenance, repairs and reinforcement purposes.The features of the boring device reside in improvements of the mode of attachment of the television camera (8) for projecting the position of the leading end of the borer (28) on its screen, the mode of attachment of the borer (28) to the body (9), the driving system of the borer (28), and also of the cutting blades of the borer (28) for cutting off the lining material.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: March 30, 1993
    Assignee: Ashimori Kogyo Kabushiki Kaisha
    Inventors: Isaburo Yagi, Hideo Maruyama, Masaru Yamakawa, Yoshifumi Osaka