Patents by Inventor Hiroyuki Sakuragi

Hiroyuki Sakuragi 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).

  • Repairing tube, method for repairing pipe lines therewith and method for removing the repairing tube
    Patent number: 5671778
    Abstract: The present invention provides a repairing tube to be used in pipe lines such as gas conduits, water supply lines and sewer lines, chiefly those buried in the ground, for the purpose of repairing the pipe lines. More particularly, the present invention relates to a repairing tube including a rigid pipe formed of thermoplastic resin and a tubular woven fabric and a method for repairing or reinforcing a pipe line with the repairing tube. Furthermore, the present invention relates to a method for removing the repairing tube in its collapsed form out of the pipe line, for example when the repairing tube installed in the pipe line has become superannuated or it has been collapsed for some reason or other to impair the function of the pipe line and hence it is desired to reline the pipe line.
    Type: Grant
    Filed: January 20, 1995
    Date of Patent: September 30, 1997
    Assignee: Ashimori Kogyo Kabushiki Kaisha
    Inventors: Hiroyuki Sakuragi, Masahiro Seshimo, Futoshi Makimoto, Shinichi Takebe, Takuji Sokawa, Hitoshi Saito
  • Method for lining pipe lines
    Patent number: 4956038
    Abstract: A method for lining pipe lines for transporting city water, city gas, petroleum and other various kinds of fluids.In a method used as a conventional art, i.e.
    Type: Grant
    Filed: June 19, 1989
    Date of Patent: September 11, 1990
    Assignees: Tokyo Gas Kabushiki Kaisha, Ashimori Kogyo Kabushiki Kaisha
    Inventors: Akio Morinaga, Masakatsu Hyodo, Tomiyo Nishimoto, Hiroyuki Sakuragi, Shinji Onishi