Patents by Inventor Tatsuya Ashida

Tatsuya Ashida 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).

  • Patent number: 5181668
    Abstract: An apparatus for inserting a coil of wire into a pipe which includes a rotatable drum for taking up a coil of spring wire, a guide for guiding the coil drawn from the rotatable drum, a push-pull device for applying external forces to the coil for feeding the coil into the pipe and retracting the coil out of the pipe, and a motor for rotating the guide and/or the drum. The drum and the guide are formed separately and are rotatable independently of each other, which rotation results in rotation of the coil of spring wire. The coil of wire has a rectangular or trapezoidal cross-section which enables the wire to effectively run through bends in the pipe without deforming or breaking.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: January 26, 1993
    Assignees: Osaka Gas Co., Ltd., Togawa Rubber Co., Ltd.
    Inventors: Toshinori Tsuji, Koichi Hosoya, Fumio Tsukimoto, Tatsuya Ashida, Katsuyuki Okubo, Tetsuo Bokuhara, Toshiaki Shinzo