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| Number | Title | Issue Date |
| 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 |
| 5861116 | Process for installing a pipe 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... | 01/19/1999 |
| 5853629 | Method of lining the internal surface of a pipe Methods of lining the internal surface of a pipe, include first inserting two lining pigs into the pipe and then introducing a batch of resin thereinto, or inserting one lining pig between two batches of a resin, or first inserting a lining pig and then i... | 12/29/1998 |
| 5845668 | Enhancing pipes A method is provided for replacing an existing service pipe carrying fluid to an outlet within a property with a replacement service pipe. In the method the outlet is disconnected within the property from the existing service pipe in such a way that both ... | 12/08/1998 |
| 5846025 | Apparatus and a method for lining an underground pipe An apparatus and a method for lining an underground pipe are proposed: the pipe is plugged at a location upstream to a manhole; a three-pronged passage is installed whose first end penetrates the plug and opens in the interior of the pipe upstream to the ... | 12/08/1998 |
| 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 |
| 5829482 | Method of plugging up coating material introduction apertures formed in hollow structural member and plugs used in performing such method A method of plugging up a coating material introduction aperture formed on a hollow structural member, the hollow structural member being coated with a coating material through dip coating and then heated to bake the coating material coated thereon, which... | 11/03/1998 |
| 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 |
| 5816345 | Horizontal drilling apparatus A bore hole support system is formed from a flexible liner that is readily everted within a bore hole and forms a bore hole support system to install a casing in the bore hole while supporting the bore hole walls. After a pilot hole is drilled, the pilot ... | 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 |
| 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 |
| 5797432 | Pipe repair clamp A pipe repair clamp especially for subsea offshore work has two half-shells held together around the pipe by two sets of diametrically opposite interlocking formations comprising in each set a series of abutments integral with a half-shell and a series of... | 08/25/1998 |
| 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 |
| 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 |
| 5792993 | Wireway sealing device The disclosure describes a sealing device for sealing two adjacent wireway sections positioned in an end-to-end relation. Each wireway section has a lower channel portion for receiving cable and a cover movable between an open position for placing cable i... | 08/11/1998 |
| 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 |
| 5791364 | Attachment for stopper for plastic gas pipelines An inflatable gas pipeline stopper is used for stopping gas flow through pipelines to permit repairs to be made to gas pipelines. For plastic gas pipelines, a tapping tee is attached to the plastic gas pipeline and a gas tight apparatus having a valve is ... | 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 |
| 5779948 | Method of lining a pipeline using a constant extrusion pressure A method and apparatus for quickly and inexpensively providing a constant extrusion pressure for pipeline lining with a mortar. A mandrel is inserted in a pipeline section with a slug of mortar ahead thereof. A pushing force is applied thereto to overcome... | 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 |
| 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 |
| 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 |
| 5778935 | Flexible replacement section for irrigation and water pipe For connecting the spaced ends of underground irrigation or water pipe, a flexible replacement section with a rigid tubular coupling at each end is employed. Each coupling has an inner diameter equal to the outer diameter of the pipe being connected and i... | 07/14/1998 |
| 5778919 | Pipeline flow stopper with dual shafts These objects and advantages are achieved by the inflatable gas pipeline stopper of the present invention, which is used to stop gas flowing through a pipeline when effecting repairs of the pipeline. The invention includes an attachment for attachment to ... | 07/14/1998 |
| 5775841 | Device for use in replacing sewage piping The invention relates to a device for use in replacing particularly sewage piping by using a forced inserting method, the device comprising an impact member (3) provided with a drawing tip (2), and a reamer (12) breaking the pipe (1)to be replaced, the re... | 07/07/1998 |
| 5775844 | Pipeline repair habitat Embodiments of a pipeline repair habitat are disclosed which may be used to facilitate the repair of vertical underwater pipelines or risers. Two hollow, half-cylindrical shells are provided which form a stable, rigid shell around the section of pipe to b... | 07/07/1998 |
| 5771938 | Water main break repair tool A new water main break repair tool for permitting repair of a broken water main without depressurizing the water main. The inventive device includes an elongate shaft with a grasping handle attached to an upper end thereof. First and second clamping assem... | 06/30/1998 |
| 5769459 | Inside sealing device sleeve for insertion of pipes An inside sealing sleeve 1 comprised of an expandable steel band for insertion in leaking pipes in need of repair is provided with an arresting arrangement 4 which permits very small detent steps. For this purpose, the internal band end 2 is provided with... | 06/23/1998 |
| 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 |
| 5762450 | System and method for relining sewer pipe sections with inspection capability A system and process for relining conveyor lines like pipelines (1) with an internal inliner (2) and an external inliner (preliner 7), whereby the internal inliner (2) forms a stiffened internal pipe (30) after insertion into the external inliner (preline... | 06/09/1998 |
| 5752786 | Method for relining a branch conduit of a main conduit The invention relates to a method for relining an underground branch conduit (10) of an underground main conduit (11) by a relining pipe (14) in the form of a radially stiff double-walled pipe with a corrugated outer wall (14A) and a smooth elastic inner ... | 05/19/1998 |
| 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 |
| 5740829 | Method of sealing an outlet opening An outlet opening (14) to a branch line 40 in a pipeline 10 is sealed without interrupting the flow of gas in the pipeline 10 by cutting an access opening 60 in the wall 62 of the pipeline 10 opposite the branch line 40. A seal 100 is inserted through the... | 04/21/1998 |
| 5738146 | Method for rehabilitation of underground piping In rehabilitating underground piping, a new piping is installed by inserting a large number of unit pipes into the existing underground piping. Each of the unit pipes has a prescribed length and is connected to an adjacent unit pipe along a longitudinal d... | 04/14/1998 |
| 5736166 | Flow-through apparatus for lining of pipelines A flow-through device for use during the installation of an inverted resin impregnated flexible tubular liner in a passageway permitting the flow of fluids through the liner during the curing portion of the installation process is provided. A cylindrical ... | 04/07/1998 |
| 5732742 | Method for re-insulating intalled steam pipe insitu A method and apparatus for re-insulating underground steam pipe in situ includes the steps of creating at least one hole in the ground, inserting a liner into the hole, using a drill string to drill a hole in the conduit, inserting a tubing into the liner... | 03/31/1998 |
| 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 |
