Patents Assigned to Insituform B.V.
  • Apparatus relating to the linings of pipelines and passageways
    Patent number: 5577864
    Abstract: The invention provides that where a main underground pipeline or passageway (10) is lined by a lining tube which extends over the connection of a lateral pipe (12) with the main pipeline or passageway (10), the lateral connection can be readily located and the lining tube (44) cut to re-establish the connection, if such as a steel ball or other deposit, which is radiation detectable, is placed on the surface of the pipeline or passageway (10) at a predetermined distance (77) from the said lateral connection.
    Type: Grant
    Filed: June 23, 1994
    Date of Patent: November 26, 1996
    Assignee: Insituform B.V.
    Inventors: Eric Wood, deceased, Miranda J. Bull, executrix