Patents Assigned to Oy Wiik & Hoglund AG
  • Sewer pipe relining method
    Patent number: 4954016
    Abstract: The present invention discloses apparatus and methods for relining sewer mains without excavation. The sewer main is accurately measured and pre-selected short sections of reliner pipe are inserted one at a time. Visual equipment and manipulative apparatus is provided which will orient lateral openings with lateral drains. The orientation sealing and grouting of the reliner pipe can be conducted after insertion so that crews can move ahead with relining other sections of the sewer.
    Type: Grant
    Filed: March 9, 1989
    Date of Patent: September 4, 1990
    Assignee: Oy Wiik & Hoglund AG
    Inventor: Christer Storgard