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| Number | Title | Issue Date |
| 7044221 | Apparatus for coupling a tubular member to a preexisting structure An apparatus for coupling a tubular member to a preexisting structure. ... | 05/16/2006 |
| 7037041 | Precast concrete pipe recycling machine The concrete pipe recycling machine is transportable to job sites for breaking apart concrete pipe and recycling the concrete and the steel reinforcement therein. The concrete pipe recycling machine has a mandrel type anvil which presses the top of the pipe upward t... | 05/02/2006 |
| 7036599 | Method and apparatus for cutting underwater structures A method for the cutting of underwater structures below the level of the sea bottom on which they are installed, comprises determining an ideal plane of cutting, having considered the characteristic features of the structure i.e. its morphology and its positioning o... | 05/02/2006 |
| 7025536 | Tandem apparatus for bursting and replacing pipe A tandem rod or cable apparatus for bursting and replacing pipe, which includes a frame, two sets of oppositely-disposed hydraulic cylinders having piston rods, each of which pairs of piston rods are attached to a yoke, with a gripping element provided in each yoke ... | 04/11/2006 |
| 7018137 | Apparatus and process for installing âTâ couplings on underground pipe A tool assembly and a process for using it is provided, wherein a single elongate handle member may be used, through a small hole at the ground surface, to reach underground pipes for installing different sized strap âTâ couplings on different sized pipes, and f... | 03/28/2006 |
| 7013249 | Method for detecting near neutral/low pH stress corrosion cracking in steel gas pipeline systems A method for predicting the location of stress corrosion cracking in a steel gas pipeline in which in-line stress corrosion cracking smart tool data, external low level metal loss data and soil characterization data are compiled to predict the location of stress cor... | 03/14/2006 |
| 7004686 | Rock bolts with expandable element In a method and device for drilling, in particular impact drilling or rotary percussion drilling, a hole in soil or rock material and forming an anchorage in the hole, wherein a bore hole is formed by the introduction of a drill bit, it is provided that the drill ro... | 02/28/2006 |
| 7004257 | Apparatus and methods for separating and joining tubulars in a wellbore The present invention provides methods and apparatus for cutting tubulars in a wellbore. In one aspect of the invention, a cutting tool having radially disposed rolling element cutters is provided for insertion into a wellbore to a predetermined depth where a tubula... | 02/28/2006 |
| 6979776 | Pipe bundle for underground installation A pipe conduit bundle for installation into a wellbore using horizontal drilling techniques is disclosed. The pipe conduit does not require an outer casing for construction. The pipe bundle configuration is formed by pipes of varying sizes in a particular configurat... | 12/27/2005 |
| 6953306 | Method of accurate trenchless installation of underground pipe A method for the trenchless installation of new underground pipe accurately on line and on grade by microtunneling to install a pilot tube, installing a drill string along the pilot pipe line using a directional drilling machine, installing a back reamer to the dril... | 10/11/2005 |
| 6953305 | Bundle of pipes and method for parallel arrangement of pipes according to a bore and swivel method A bundle of tubes or pipes is arranged without trenches according to a fluid-assisted drilling method. A bore channel is made in a first boring step and the bore channel is widened when the bore/flushing head is removed therefrom, the bundle of tubes being drawn int... | 10/11/2005 |
| 6913091 | Method and apparatus for replacement of underground pipe An impactor for use with a directional boring machine for replacement of underground pipes includes a bursting head having a rearwardly opening recess and a front end opening that communicates with the recess. An inlet pipe is connected at its front end to a distal ... | 07/05/2005 |
| 6896077 | Rotary driven pipe-bursting tool An apparatus for bursting pipe is preferably adapted to receive rotational energy from the inner member of a dual-member drill string. In a preferred embodiment, an oscillating pipe-bursting member, driven by the interconnected inner members, cuts or bursts a subter... | 05/24/2005 |
| 6854932 | Cable pulling apparatus A cable pulling apparatus for pulling a work load attached to a cable, including at least one cable-pulling device for engaging the cable. The cable-pulling device or devices each includes at least one cable-pulling member fitted with a cable-gripping element for pu... | 02/15/2005 |
| 6811356 | Cable and method for laying in plastic tubes A cable for laying in plastic tubes for transporting gas or water is described that comprises a cable core assembly and a plastic sheath surrounding the cable core assembly, in which cable the plastic used for the plastic tube and the plastic for the sheath can be w... | 11/02/2004 |
| 6799923 | Trenchless water pipe replacement device and method The trenchless water pipe replacement device includes a cable pulling device, a pipe splitter, a length of cable and a cable end piece. The cable is fished through a pipe that is to be replaced, and a length of replacement pipe is attached to the end piece. The pipe... | 10/05/2004 |
| 6793442 | Device and method for trenchless replacement of underground pipe The basic features of the invention include a pipe parting mole, a length of cable that is engagable to the mole, a cable pulling device and a cable pulling device engagement means that provides a mounting structure for the cable pulling device. The cable pulling de... | 09/21/2004 |
| 6761507 | Method and apparatus for replacement of underground pipe An impactor for use with a directional boring machine for replacement of underground pipes includes a bursting head having a rearwardly opening recess and a front end opening that communicates with the recess. An inlet pipe is connected at its front end to a distal ... | 07/13/2004 |
| 6755593 | Pipe replacement method and rotary impact mechanism for pipe bursting An impactor for use with a directional boring machine having a drill string connectable to the impactor for pulling the impactor through an existing pipeline uses rotation of the drill string to drive an internal striker. The internal striker delivers impacts in the... | 06/29/2004 |
| 6755592 | Device for repairing underground sewers A device for repairing underground sewers, pipe or the like provided a cylindrical hollow body, which has an elastically expandable casing acting as an outer wall. ... | 06/29/2004 |
| 6702521 | Pipe replacement apparatus The invention is a tool for replacing underground pipe. The tool has a nose coupler for coupling a pulling chain for pulling the tool through the underground pipe, a rear portion with a rear coupler for coupling a retaining chain, a plurality of breaking ... | 03/09/2004 |
| 6702520 | Multi-purpose rehabilitation of conduits Methods and apparatuses for rehabilitating and increasing the functionality of existing underground conduits wherein a plurality of conduits are simultaneously inserted into an existing conduit by bursting the existing conduit to create a tunnel and inser... | 03/09/2004 |
| 6672802 | Vertical pull apparatus A vertical pull apparatus for converting a vertical pulling motion to a horizontal pulling motion, which vertical pull apparatus typically includes a support for positioning in a generally vertical position. A cable-engaging mechanism is provided on the s... | 01/06/2004 |
| 6669406 | Method and apparatus for underground connection of pipe The method and two devices provide for the underground connection of pipe with minimal disruption of the surrounding landscape. A main pipe is cleaned by a surface preparation tool designed to access the main pipe through a small hole. An adaptor is attac... | 12/30/2003 |
| 6655874 | Method and apparatus for slitting flexible pipe in an underground bore A method of slitting a flexible conduit in an underground bore, the conduit having entry and exit ends thereof exposed for access, includes: (1) fitting a retainer to flexible underground conduit adjacent to the entry end thereof, the retainer securing th... | 12/02/2003 |
| 6588983 | Trenchless pipe replacement apparatus and 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 ... | 07/08/2003 |
| 6585453 | Apparatus for trenchless underground pipe replacement An apparatus for replacing underground pipe. The apparatus has a fracturing or cutting element to fracture or cut underground pipe as it is drawn through the underground pipe. The apparatus additionally has an expanding element to expand the cavity of the... | 07/01/2003 |
| 6568488 | Roller pipe burster A pipe bursting system of the invention operates by compaction rather than by reaming. The system includes a conventional directional boring machine, a drill string, and a pipe burster attached to the terminal end of the drill string. A pipe burster accor... | 05/27/2003 |
| 6551028 | Pipe replacement apparatus A tool for replacing pipe, in which the existing underground pipe is fractured or cut into fragments, which are forced inward so that they pass through the tool. The tool has breaking members that extend radially outwards and backwards from a nose such th... | 04/22/2003 |
| 6524031 | Device and method for trenchless replacement of underground pipe A trenchless pipe replacement device including a pipe parting mole, a length of cable that is engagable to the mole, a cable pulling device and a cable pulling device engagement device that provides a mounting structure for the cable pulling device. The c... | 02/25/2003 |
| 6499912 | Tool for replacement of underground plastic pipe A tool for replacing existing plastic water service pipes that are buried underground. The proposed tool is pulled through an existing pipe by a stranded steel cable. The internal wall of the pipe is scored by a single cutting blade incorporated into the ... | 12/31/2002 |
| 6491476 | Method and apparatus for the trenchless laying of pipework underground Apparatus and method for the trenchless laying of pipework underground, having a total and a gauge for the continuous widening of a preferably wound preformed pipe on a linkage for use in pits of small dimensions, preferably inspection shafts of sewage sy... | 12/10/2002 |
| 6386797 | Conduit liner cutter The present invention is an improved cutting device and method for cutting openings in rehabilitative sewer pipe liners and other surfaces in confined spaces. The present invention utilizes a stream of ultra-high pressured fluid as a cutting medium to red... | 05/14/2002 |
| 6382877 | Method of installing replacement pipe and apparatus therefor The invention concerns the replacement of underground pipes (52) wherein a former/cutting blade device (10) is pulled along the line of the existing pipe (52) by a cable fed (30) previously into the existing pipe (52). As the device (10) is so pulled it c... | 05/07/2002 |
| 6357967 | Apparatus for bursting and replacing pipe An apparatus for bursting and replacing gas, water, sewer or other underground utility pipes. In a preferred embodiment the apparatus is characterized by a specially-designed rod-pulling device which is situated typically in a manhole or excavation, at on... | 03/19/2002 |
| 6340270 | Apparatus and method for the longitudinal splitting of pipes laid underground An apparatus for longitudinal splitting, in particular longitudinal slitting, of pipes laid underground and for the simultaneous trenchless pulling-in of a new pipeline comprises a carriage in the form of a frame, in which a cutting wheel for cutting open... | 01/22/2002 |
| 6305880 | Device and method for trenchless replacement of underground pipe The basic features of the invention include a pipe parting mole, a length of cable that is engagable to the mole, a cable pulling device and a cable pulling device engagement frame that provides a mounting structure for the cable pulling device. The cable... | 10/23/2001 |
| 6098708 | Apparatus for pulling a pipe into an earth bore An apparatus for pulling a pipe (12) into an earth bore, especially for replacing a breakable supply conductor laid in the earth, includes an approximately conical displacement head having a cylindrical tubular shaft (18) connected to its large diametered... | 08/08/2000 |
| 6092553 | Method of installing re-placement pipe The invention provides that an existing underground pipe (52) is replaced by pulling a cutting device (10) through the existing pipe (52) by means of a strong steel stranded cable, and at the same time pulling the replacement pipe (26) along behind the cu... | 07/25/2000 |
| 6092406 | Pipeline mandrel positioning control system A method and apparatus is provided for automated control and positioning of a mandrel within a pipe during bending operations. Position detection is accomplished by means of a low frequency electromagnetic signal transmission from a coil placed in close p... | 07/25/2000 |
