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| Number | Title | Issue Date |
| 5911246 | Pressure-expandable conduit liner Conduit liners and methods for their construction and use are provided. The liners include a first flexible layer mechanically bonded to at least one glass-containing layer and folded to form a tubular laminate. The laminate can be penetrable by resinous ... | 06/15/1999 |
| 5887627 | Method for reconstructing corroded pipes A method for reconstructing corroded pipes is disclosed in which a long, new pipe can be inserted smoothly and without excessive force, into an older pipe. The method involves the insertion of a new pipe into an old pipe using a dolly to transfer the reac... | 03/30/1999 |
| 5873391 | Pressure-expandable conduit liner Conduit liners and methods for their construction and use are provided. The liners include a first flexible layer mechanically bonded to at least one glass-containing layer and folded to form a tubular laminate. The laminate can be penetrable by resinous ... | 02/23/1999 |
| 5873390 | Methods of lining the internal surface of a pipe There is provided a method of lining the internal surface of a pipe involving a larger diameter portion, said method comprising the steps of inserting a first pig into the pipe from an open end thereof, said first pig being a spherical body made of a resi... | 02/23/1999 |
| 5868169 | Reinforced lining hose for softlining pipe rehabilitation An improved tubular lining hose for use in softlining pipe rehabilitation which includes the novel use of a layer of reinforcing fibers to reinforce the lining hose. In a preferred embodiment, a layer of reinforcing fibers, such as fiberglass, is encapsul... | 02/09/1999 |
| 5857494 | Pipeline structure with a lining material, an end structure of said pipeline and a method for applying a lining material to a pipeline A pipeline structure with a lining material wherein a hermetic outer tube is disposed at the inner surface of a pipeline, and an inner lining material is disposed at the inner surface of the outer tube, said inner lining being made of a rigid fiber-reinfo... | 01/12/1999 |
| 5839475 | Method and apparatus for lining a pipe with a polymer linear A method and apparatus for lining a pipe with a polymer liner in which the liner is pulled through a die to reduce the liner's diameter and through the pipe and on removal of the pulling load, allowing the liner to revert to at least the minimum internal ... | 11/24/1998 |
| 5836357 | Pressure-expandable conduit liner Conduit liners and methods for their construction and use are provided. The liners include a first flexible layer mechanically bonded to at least one glass-containing layer and folded to form a tubular laminate. The laminate can be penetrable by resinous ... | 11/17/1998 |
| 5816293 | Apparatus for installation of a liner within a pipeline The apparatus for installing a repair liner/sleeve within a pipeline includes a rigid tube supported above a manhole or excavation leading to the entry of the pipeline to be repaired. A rigid tube is supported on a plurality of legs aligned above the manh... | 10/06/1998 |
| 5816745 | Underground pipe replacement technique The apparatus and technique of the invention constitutes a hydraulic jack system for pushing sections of new pipe which, in turn, pushes a sleeve-cone expander arrangement to break up the old pipe and define a straight path for the new pipe. Apparatus is ... | 10/06/1998 |
| 5817200 | Surfacing of rehabilitating structures A flexible liner is formed from a resilient material and includes a back side surface having a number of outwardly projecting members that extend a distance away from the liner. The flexible liner is in sheet form for rehabilitating surface sections, and ... | 10/06/1998 |
| 5814387 | Rubber band for repairs and method therefor The present invention relates to a rubber band for pipe repairs that can be tightly wound about a pipe of various types at a portion where fluid is leaking to cut off the leakage. A tentative fixing means is provided on one end of the rubber band and a re... | 09/29/1998 |
| 5810053 | Pipe liner, a coiled liner product and methods for forming, installing and coiling the liner A thermoplastic liner is extruded in cylindrical form and deformed at a temperature below the crystallization temperature of the polyethylene material forming the liner into a generally W-shaped configuration. The liner in that configuration has three con... | 09/22/1998 |
| 5807025 | Process for lining a channel and fitting and withdrawal slide for implementing it A method of lining a sewer in which an inner pipe is introduced into an eting sewer, and the space between the outer surface of the inner pipe and the inner surface of the sewer is filled with a filler. To introduce the filler into the space, at least on... | 09/15/1998 |
| 5803665 | Method and apparatus for continuous production of quick-setting foamed cement grout with selectively adjustable proportions A method and apparatus for continuous production of a quick-setting foamed cement grout, in which the individual constituents of the grout are proportionally adjustable. Finished foam and cement slurry are mixed at metered rates to form a foamed cement gr... | 09/08/1998 |
| 5799701 | Method of and an apparatus for lining a pipeline Pipelines are lined by inserting a lining pipe R out of a long profile beltlike member to be supplied and wound involutely within the pipeline. A jointing mechanism and a guide roller block are arranged around a mounting frame. The lining pipe R is produc... | 09/01/1998 |
| 5794663 | Apparatus for repairing a pipeline and method for using same A pipe repair apparatus includes an outer carrier tube, an inner bladder tube within the carrier tube, and a repair sleeve within the bladder tube. The bladder tube and the carrier tube are formed by one unitary tube which is folded back upon itself. A wi... | 08/18/1998 |
| 5794662 | Pipe liner and method of installation A method of relining sewer lines, waterlines or gas lines is disclosed which uses a segmented liner of reduced size relative to the pipe being relined, with the liner being heat/pressure molded to the shape of the pipe being relined. The liner segments ar... | 08/18/1998 |
| 5791378 | Method for grouting pipe liners A pumpable cement grout and method for use thereof for grouting liner pipes. The pumpable cement grout is a mixture of a hydraulic cement, water in an amount sufficient so that the water-to-cement ratio of the grout is from about 0.60 to about 1.00 by wei... | 08/11/1998 |
| 5791380 | Methods of forming insulated pipeline bundles Methods of forming highly insulated pipeline bundles made up of one or more flow lines positioned within a continuous larger diameter outer sleeve are provided. The methods basically comprise the steps of filling the space between the outside of the flow ... | 08/11/1998 |
| 5787933 | Method of obtaining a leakproof connection between a tube and a sleeve A method of obtaining a leakproof connection between a metallic tube having a leak and a metallic sleeve extending over the leak, includes expanding the sleeve being formed of a material having given strength values against an inner wall surface of the tu... | 08/04/1998 |
| 5780123 | Tubular liner and a method for connecting ends of liner tubes A tubular liner, for lining the inner wall of a pipe, comprises a plurality of composite liner tubes, each liner type contains an inner layer of a resin-absorbable sheet and an outer layer of hermetic plastic film. The composite liner tubes are joined by ... | 07/14/1998 |
| 5778936 | Full flow winding machine A system for generating a liner tube for an underground pipe while material is flowing through the pipe, incorporates a liner winding assembly, a carriage assembly connected to the liner tube being formed, a towing device for generating a pulling force on... | 07/14/1998 |
| 5778937 | Method of making leakproof sites of entry of domestic connector pipes and similar feed pipes into sewers A method for producing leak-proof sites of entry for domestic connection pipes and other feed pipes into sewers. The method includes the steps of widening the site of entry of the feed pipe into the sewer, providing a barrier towards the interior of the s... | 07/14/1998 |
| 5778938 | Method of installation of dual containment pipe rehabilitation system A dual containment pipe system suitable for installation into an existing conduit includes an impervious containment pipe adapted to be installed as a primary containment pipe and a crush-resistant and flexible spacer element disposed about the entire ext... | 07/14/1998 |
| 5765597 | Apparatus for repairing a pipeline and method for using same A pipe repair apparatus includes an outer carrier tube, an inner bladder tube within the carrier tube, and a repair sleeve within the bladder tube. The bladder tube and the carrier tube are formed by one unitary tube which is folded back upon itself. A wi... | 06/16/1998 |
| 5743299 | Dual containment pipe rehabilitation system and method of installation A dual containment pipe system suitable for installation into an existing conduit includes an impervious containment pipe adapted to be installed as a primary containment pipe and a crush-resistant and flexible spacer element disposed about the entire ext... | 04/28/1998 |
| 5740838 | Methods of lining the internal surface of a pipe There is provided a method of lining an existing underground main pipe involving a branch pipe. The method comprises injecting a necessary amount of resin into the branch pipe from an open end thereof, introducing behind the resin a pig apparatus into the... | 04/21/1998 |
| 5727597 | Point repair system for conduits A repair system for repairing faults in a conduit. A protective skirt protects the leading edge of a repair sleeve on an inflatable mandrel. One or more straps hold the repair sleeve in position as the mandrel is inserted into the conduit. A release liner... | 03/17/1998 |
| 5725026 | Conduit lining system and method of lining a conduit A conduit lining system and a method for lining conduits, particularly conduits in need of repair. The system includes a longitudinally extending liner, initially transversely curled in a pre-installation position but being capable of becoming uncurled in... | 03/10/1998 |
| 5711351 | Forming openings in pipes Apparatus for forming an opening in a pipe from the interior thereof comprises a hydraulic ram having a cylinder within which slides a piston rod. A sharpened wedge-shaped tool is mounted in the free end of the piston rod, and the end of the cylinder remo... | 01/27/1998 |
| 5706861 | Rehabilitation of pipelines and passageways with a flexible liner using an inflatible bladder An assembly which can be inserted into a pipeline or passageway on which a curable resin impregnated flexible lining is placed about an inflatable bladder is provided. The bladder is mounted to one end of a core pipe and folded over on itself. Medium flow... | 01/13/1998 |
| 5706862 | Pipe repair device A pipe repair device (10) includes a slotted strap (18) having a first end (20) and a second end (22). The second end (22) of the strap (18) is connected to an adjusting mechanism (24) that is operable to engage the slots in the strap (18) to increase or ... | 01/13/1998 |
| 5698056 | Method for manufacturing a tubular liner bag A method for manufacturing a liner bag used for lining used underground pipes: (i) a long tube of a rectangular resin absorbent sheet, whose outer face is hermetically coated with a plastic film, is formed with a long cavity along the entire length of its... | 12/16/1997 |
| 5692543 | Lining of lateral pipelines with a liner having a sealing collar A method and apparatus is disclosed for lining a lateral pipe branching off of a main pipe with a flexible resin absorbent tubular lining portion having an integral sealing end which includes a flexible resin absorbent end collar portion and a preformed s... | 12/02/1997 |
| 5680885 | Method for rehabilitating pipe An improved method of rehabilitating a conduit which is in a damaged or deteriorated state. A lining hose, having a resin absorbing inner layer which is soaked with an excess volume of resin, is expanded and shaped to conformingly line a conduit by invert... | 10/28/1997 |
| 5676175 | Plastic liner A plastic liner having a second, deformed shape, and having a memory of a first, undeformed memory shape, the deformation in the deformed shape comprising one or more deformations, at least one of which is a twist deformation consisting of alternate left-... | 10/14/1997 |
| 5645375 | Method and apparatus for grouting of tunnel liners A method and apparatus for filling cavities in underground excavations. Sodium silicate and aqueous foam are mixed with cement slurry to produce a quick-setting foamed cement grout having a meringue-like consistency. The high viscosity of the grout combin... | 07/08/1997 |
| 5634743 | Lining of pipelines and passageways The lining of pipelines and passageways is effected by everting a flexible lining tube containing curable synthetic resin into and along the pipeline or passageway. The resin is of the latent type and requires the application of energy to initiate the cur... | 06/03/1997 |
| 5628345 | Point repair system for conduits A repair system for repairing faults in a conduit. A protective skirt protects the leading edge of a repair sleeve on an inflatable mandrel. One or more straps hold the repair sleeve in position as the mandrel is inserted into the conduit. A release liner... | 05/13/1997 |
