Patents Assigned to Insituform Group Limited
  • Lining of pipelines or passageways
    Patent number: 4680066
    Abstract: The invention provides for the light curing of a synthetic resin which is light curable, and is arranged as a layer upon the surface of a pipeline or passageway. The curing lamps are enabled to be pulled into the pipeline or passageway by virtue of inserting a tubular member into the passageway which is inflatable by fluid pressure so as to hold the resin layer in position. The lamps pass through the inflatable tubular member so that radiation therefrom will fall on the layer of resin and cure or initiate the cure of the same.
    Type: Grant
    Filed: July 15, 1985
    Date of Patent: July 14, 1987
    Assignee: Insituform Group Limited
    Inventor: Eric Wood
  • Apparatus for inspecting the interior of a pipeline
    Patent number: 4677472
    Abstract: An apparatus for the inspection of the interior of pipelines or passageways, which apparatus includes a T.V. inspection camera and a cable connected to the camera for both supplying electricity and for pulling the assembly along the pipeline or passageway, the camera being arranged at an angle to the pipeline or passageway axis, and by actuating a drive means of the assembly the cable forms a drive member and is propelled through the assembly pushing the camera up a lateral pipeline for the inspection of same.
    Type: Grant
    Filed: November 21, 1985
    Date of Patent: June 30, 1987
    Assignee: Insituform Group Limited
    Inventor: Eric Wood