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| Number | Title | Issue Date |
| 7191801 | Apparatus and method for installation of pipe liner An apparatus and method for lining sewer pipes that utilize an adjustable form configured to conform to the shape and dimensions of the interior of a man-entry sized pipe line. The adjustable form can be used to position a sheet of liner material immediately adjacen... | 03/20/2007 |
| 7029254 | Apparatus and method for repairing a damaged portion in a tubular member made of refractory material There are provided a shaft adapted for introduction into a tubular member made of refractory material and an expander provided on a leading edge of the shaft. The expander has both ends provided with a repairing material container and a seat plate. With the repairin... | 04/18/2006 |
| 7018577 | Panel liner and method of making same A method of forming a liner for a passage such as a sewer includes forming panels composing the liner using a neat resin of a first density and a polymer concrete of a second, higher density. The neat resin is inserted into a mold cavity before the polymer concrete ... | 03/28/2006 |
| 6890461 | Method of reinforcing concrete electric pole In a method of reinforcing an existing concrete electric pole having an annular side wall, an inner hollow portion provided therein and an opening portion formed to a position of the annular side wall to be penetrated therethrough, at least one of a predetermined am... | 05/10/2005 |
| 6884373 | Process for securing a branch assembly to a pipeline A method for securing a branch assembly to a “live” pipeline. An upper part of the assembly incorporating the branch is positioned on the pipeline over a containment ring located on the pipeline and within which is an annular seal surrounding an area from which ... | 04/26/2005 |
| 6796743 | Internal line for fastening cables in a waste-water pipe For the purpose of fastening cables to the inner wall of a non-accessible waste-water pipe, an internal liner has been developed, which is constructed from at least two layers, the first layer, which rests against the internal wall of the pipe when in the laid condi... | 09/28/2004 |
| 6682668 | Installation of cured in place liners with an endless reusable inflation bladder and installation apparatus A process for lining an existing pipeline or conduit with a flexible resin impregnated cured in place liner by pulling in the liner and inflating it with a reusable endless inflation bladder is provided. The liner includes a resin absorbent material in tu... | 01/27/2004 |
| 6641688 | Method for sealing an annular space A method for providing a seal in an annular space between a rehabilitative pipe liner and a conduit wall is provided. Areas on the surface of a section of a conduit wall surrounding lateral connections are provided with an expandable sealing agent, prefer... | 11/04/2003 |
| 6637092 | Method and apparatus for winding a helical pipe from its inside A machine (200) for winding a strip of material (212) into a helical pipe wherein adjacent convolutions of the strip (212) are interlocked. The machine comprises: a frame (220) having circumferentially spaced supports in the form of rollers (266, 276, 278... | 10/28/2003 |
| 6613261 | Molded pipeline pig with hardness variations A method of forming a pipeline pig in two or more steps is provided. Selected disks and/or cups, of selected size and hardness, are first formed. These disks and/or cups may include scraper disks, seal disks, flower petal disks, and/or cups in various siz... | 09/02/2003 |
| 6596121 | Method of making composite liner for oilfield tubular goods A method for making a composite lined tube is disclosed, wherein the tube has end couplings on it. The method includes pressing a resin impregnated fiber preform progressively along an inner wall of the tube. In one embodiment, the method includes inserti... | 07/22/2003 |
| 6572306 | Method of laying data cables and the like in underground pipes and pipe-cable combinations One or more electric and/or data transmitting cables are confined in an elongated strip-shaped body containing a hardenable resin or the like, and the body is placed against a portion of the internal surface of an underground sewage, water or other pipe. ... | 06/03/2003 |
| 6494978 | Deteriorated structure repair method for restoring and lining corroded structure A method for protecting and for restoring structural strength and substance to a concrete, fluid containing or conducting structure deteriorated to the condition of removal of substance of the concrete by sulfuric acids and like corrosive material in cont... | 12/17/2002 |
| 6482280 | Method of impregnating pipe repair liner 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... | 11/19/2002 |
| 6423258 | Machine and method for providing folded pipe liners A machine and method for providing a folded liner for insertion into a pipe, comprises an upper section and a lower section. A flattened heated thermoplastic liner is fed downwardly through the upper section to the lower section, where it is redirected an... | 07/23/2002 |
| 6382876 | Method of repairing or reinforcing worn-out underground burried drainpipes by resin transfer molding process using both flexible tubes and bagging films A method of repairing or reinforcing worn-out underground buried drainpipes by a resin transfer molding process using both flexible tubes and bagging films is disclosed. In the method of this invention, a reinforcement is primarily inserted into a desired... | 05/07/2002 |
| 6241925 | Method of lining channels A method of lining a channel can be provided which includes the steps of: installing at a work site a roll having wound thereon a rigid or semirigid plastic pipe shaped initially in the form of an approximately round tube and deformed from the initial for... | 06/05/2001 |
| 6228312 | Thermoplastic composite products and method of lining pipework A pipe (4) is rehabilitated by means of a tubular liner (5) which is introduced into the pipe in a contracted form, expanded into contact with the pipe wall, and hardened to retain its form. The liner (5) comprises composite material formed by knitting, b... | 05/08/2001 |
| 6217688 | Method of repairing a flanged pipe joint A method of repairing a flanged pipe joint includes selecting a flexible sheet of material and mounting a tube through the selected material to form a passageway therethrough. One end of the mounted tube is positioned against a flanged pipe joint and the ... | 04/17/2001 |
| 6102105 | Repair of electrical generator stator leaks, cracks and crevices A system for repairing leaks, cracks and crevices in a stator assembly of the type having a fluid cooling system. The system includes an anaerobically activated, liquid polymer curable sealant supply which is circulated through the fluid cooling system of... | 08/15/2000 |
| 6098665 | Method and apparatus for lining a conduit A method for lining a conduit with a deformable plastics liner pipe, the claimed method including deforming the liner along its length to a cross-section with reduced external dimensions relative To the dimensions of the undeformed liner and binding the l... | 08/08/2000 |
| 6074595 | Method of making pressure vessels Methods for making tubular pressure vessels from polymer-impregnated fibrous material utilize cylindrical mandrels that are helically wound while rotating about a horizontal axis. After end closure fittings are installed on the mandrel, a barrier layer ha... | 06/13/2000 |
| 5992467 | Liner reduction system using pressurized dies and apparatus therefor This application discloses a liner pipe reduction system comprising at least one pressurized die and at least one pressure cell. The pressurized dies and pressure cell are interconnected to form a reduction system to reduce the friction of liner pipe as i... | 11/30/1999 |
| 5942183 | Method for everting a liner using a compact apparatus A compact apparatus for everting a liner utilizing fluid pressure after the liner has been aligned with the conduit to be lined is provided. The apparatus includes a sphincter valve with its axis aligned with the conduit to be lined and an eversion pressu... | 08/24/1999 |
| 5928447 | Conduit repair and interior reconstruction A method for repair of a length of a conduit having a circumferential inner surface, by anchoring to the inner surface in a direction parallel to the length a plurality of sections of tubing of generally rectangular cross-section spaced around the conduit... | 07/27/1999 |
| 5918639 | Device for repairing damage or providing branchings on existing pipe installations A device for repairing damages or providing branchings on pipes, especially in existing underwater pipe installations, comprises a cylindrical, longitudinally divided muff (1) which is dimensioned to be placed around and clamped to the topical pipe (4) by... | 07/06/1999 |
| 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 |
| 5804093 | Joint infill mold A system for filling a gap between jacket ends at a joint between two lengths of jacketed pipe is disclosed, comprising: a mold and two pairs of side straps encircling the mold. The mold comprises a sheet of material having first and second ends and oppos... | 09/08/1998 |
| 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 |
| 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 |
| 5683530 | Reinforcement methods utilizing high tensile strength composite bands Axially extending structures having internal forces directed radially outward therefrom may be reinforced by installing bands around the structures. The bands consist of a plurality of elastic convolutions of a composite material which assume a coiled con... | 11/04/1997 |
| 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 |
| 5626801 | Method of lining a host pipe with a liner by diameter reduction with angularly offset rollers A method is shown for lining a host pipe with a polyolefin liner having an outside diameter which is initially greater than the inside diameter of the host pipe. A length of the liner is cryogenically cooled to a supercooled state to reduce the outside di... | 05/06/1997 |
| 5606997 | Method for rehabilitating pipe line and resin impregnated lining having an integral heating element A method and lining for rehabilitating a pipe or conduit. The method comprising providing a heat curable resin impregnated lining with first and second conductive strips extending lengthwise through the lining from a first end to a second end and separate... | 03/04/1997 |
| 5527169 | Device for repairing pipe joints A device for repairing cast iron pipe joints comprises a head having a motor for actuating a tool and a body, the head being pivotally connected to the body so that it can be pivoted from an axial position to a radial position within the pipe. In a prefer... | 06/18/1996 |
| 5469891 | Method for relining underground pipelines The invention relates to a material wherein the main constituent is PVC for manufacturing pipes to be used for relining underground pipelines by the pipe in a folded condition being drawn into the pipeline and being engaged with the inside surface of the ... | 11/28/1995 |
| 5445848 | Tape for reinforcing pressure-supporting hollow bodies and a method for repairing deteriorated pipes A method for repairing and reinforcing pressure-supporting hollow bodies, in particular deteriorated underwater pipelines, using a tape formed from a plurality of layers.... | 08/29/1995 |
| 5407483 | Method for impregnating a lining material with a hardenable resin An improved method for impregnating a tubular lining material with a hardenable liquid resin employed in a pipe repair operation by lining the pipe internally with the lining material; the method comprises (a) supplying about the same amounts of the same ... | 04/18/1995 |
| 5256342 | Method of lining a host pipe with a liner using cryogenic cooling A method and apparatus are shown for lining a host pipe with an elastomeric liner having an outside diameter which is initially greater than the inside diameter of the host pipe. A length of the liner is reduced to a downsized outside diameter and the dow... | 10/26/1993 |
| 5246641 | Method for lining a pipe with a cement mortar An improved method for lining a section of pipe with a cement mortar. After a wet cement mortar has been applied to a cleaned interior surface of a pipe, carbon dioxide is introduced into the freshly lined section of the pipe in such quantity that a crust... | 09/21/1993 |
