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US 4,637,754 AGranted
Lining of pipelines and passageways
AssigneeInsituform Holdings Limited
InventorEric Wood
Life of this patent
Estimating the term…
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.
Claims7
A method of lining a pipeline or passageway comprising the steps of:
- A. inserting pads of resin absorbent material impregnated with a curable synthetic resin into the pipeline or passageway at spaced intervals by driving an anchoring pin through each pad into a wall of the pipeline or passageway so that a head of said pin traps the respective pad to said wall while leaving an overlapping portion of the pad surrounding the head of the pin;
- B. inserting into the pipeline or passageway, before the resin impregnating said pads of material has cured, a resin impregnated tubular liner presenting a face of uncured resin to said pads so that the uncured resin face of the liner comes into resin contact with the overlapping portions of the pads of resin absorbent material;
- and
- C. curing the resin of the pads of resin absorbent material and the liner such that the pin heads become embedded in cured resin and provide compressive hoop stress reinforcement for the liner.
1 more element
Dependencies are inferred from the claim text.