Patents Assigned to Toa Grout Kogyo Kabushiki Kaishi
  • Liner for pipeline repair and method for repairing pipelines
    Patent number: 5035539
    Abstract: A liner for pipeline repair is provided that includes an elastically deformable sleeve having impermeability, a base having a sheet-like base portion disposed inside the sleeve, wound into a cylindrical form, and expandable radially and fixing means disposed in the base for maintaining the base portion in a subtantially cylindrical form when the base portion is expanded radially within the sleeve. The liner is used for preventing the outflow of water from a pipeline such as a sewer pipe and/or the inflow of water into the pipeline.
    Type: Grant
    Filed: August 13, 1990
    Date of Patent: July 30, 1991
    Assignees: Toa Grout Kogyo Kabushiki Kaishi, Kabushiki Kaisha Iseki
    Inventors: Takayuki Kawafuji, Toshio Akesaka, Sinkiti Ooka