Patents Assigned to Insituform Holdings Limited
  • Lining of pipelines and passageways
    Patent number: 4637754
    Abstract: The invention provides that a resin impregnated lining tube is applied to a pipeline or passageway surface to which have been pre-applied pads impregnated with the same resin, so that the resin impregnated pads bond to the liner as curing of the resin takes place.
    Type: Grant
    Filed: December 14, 1984
    Date of Patent: January 20, 1987
    Assignee: Insituform Holdings Limited
    Inventor: Eric Wood
  • Lining of pipelines and passageways
    Patent number: 4622196
    Abstract: The invention provides that in inserting a resin impregnated liner into a pipeline or passageway and shaping same to the passageway surface, followed by curing of the resin to form a rigid lining inside the pipeline or passageway, there are placed in the passageway reinforcing circumferential coils or members which bond to the liner and provide extra resistance to compressive hoop stress.
    Type: Grant
    Filed: January 7, 1985
    Date of Patent: November 11, 1986
    Assignee: Insituform Holdings Limited
    Inventor: Eric Wood