Abstract: A method of forming a lining in a pipeline comprising forming on the inner surface of the pipeline a film of initiator and following the formation of this film of initiator, a layer of resin is formed on the film of the initiator for effecting accelerated cure of the resin thereby to form a cured lining in the pipeline inner surface.

Abstract: The method discloses the lining of a lateral connection to a pipeline. The method is by remotely inserting a unit in the pipeline and everting a flexible lining tube out of an outlet in the unit directly into the lateral connection. The lining may be a flexible lining which subsequently hardens to form a rigid pipe inside the connection. The eversion of the lining tube is by means of a fluid pressure differential.

Abstract: A method of lining a passageway, such as an undergound sewer is disclosed. A fluent but thixotropic cementitious composition is sprayed onto the surface of the passageway, to form a lining of predetermined thickness and before the material has had time to flow to change its distribution on the surface, a flexible tube is everted onto the applied material, holding it in position until it is sufficiently cured.

Abstract: The present invention relates to the provision of a filling material such as an inorganic filler in the felt, especially a needled felt. The resulting felt material is formed into a tube for use in a passageway lining process in which the felt material is soaked in a curable resin. The purpose of the filling material is to reduce the quantity of resin required to impregnate the felt, thereby to reduce the cost of the process.

Abstract: The invention provides that a flexible liner is everted into a passageway to line same using liquid under pressure. The liner is fed through an enclosure before it everts and eversion is achieved by pressurization of the liquid in the enclosure. The feed of the liner through the enclosure is preferably controlled by the drivable feed rollers through a nip of which the liner passes. The rollers preferably have projections which engage the liner positively to engage the liner. The invention has particular applicability to the placement of liners which although flexible and evertible when being installed, set hard when in position lining the passageway.

Abstract: A method of impregnating the inner absorbent layer of a long flexible tube with a curable resin is begun by introducing a mass of the resin into one end of the tube. A window is formed in the impermeable outer layer of the tube at a distance from the resin mass. A vacuum in the interior of the tube is drawn through the window and concurrently the resin mass is pushed toward the evacuated region by passing the tube between a pair of squeezing members. When the flowing resin reaches the vicinity of the window, the window is sealed. Another window is formed in the tube farther downstream of the previously formed window. A vacuum is drawn through the new window while the squeezing members force the resin to flow toward the newly evacuated region. The procedure is repeated until the resin has spread through the entire inner absorbent layer of the tube.

Abstract: A lining comprising a resin absorbent tube having on the outside a fluid impermeable membrane everted into the passageway to line same using fluid pressure. The resin absorbent material is soaked in resin by trapping a quantity of resin in the lining before it everts in the passageway, and the resin is cured after the lining is everted into the passageway surface, preferably by a curing means following the everting lining along the inside of the passageway.

Abstract: A method wherein a tubular liner is applied to the surface of a passageway such as a tunnel or pipeline bore. The liner may be in the form of a flattened tube of absorbent material such as felt or foam such is impregnated with synthetic resin. The liner is anchored at one end of the passageway and is fed into the passageway being turned inside out as it is so fed in. In order to eliminate friction, the liner, before being turned inside out, is supported buoyantly by liquid which serves to carry the liner.

Abstract: A power generating system for the generation of energy from the wave motions of the sea is buoyantly supported by the sea. The system comprises spine elements defining a spine on which ducks are rockably mounted, the system further including tension cable means pressing the spine elements towards each other thereby to define a spine, and energy conversion means for converting the rocking motion into electrical power.

Abstract: A method of lining a passageway with a hard, rigid pipe of thermosetting resin, wherein a tubular fibrous felt is immersed in the resin to form a carrier for the resin. The immersed felt and resin have an inflatable tube therein and this tube is inflated to shape the resin to the passageway surface. The resin is cured to form the hard, rigid lining pipe with the felt embedded therein.