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| Number | Title | Issue Date |
| 7523707 | Machine and method for welding rails of a track A machine for welding the rails of a track includes a rail pulling device that grips the rail ends and pulls them together so that they can be welded to one another. Two rail clamps provided for gripping the rails are fastened to the rail pulling device. The rail cl... | 04/28/2009 |
| 6935430 | Method and apparatus for expanding a welded connection The present invention generally relates to methods of connecting two expandable tubulars. In one aspect, the method includes flash welding the ends of the expandable tubulars together. Thereafter, the connected tubulars are lowered into the wellbore for expansion. T... | 08/30/2005 |
| 6935429 | Flash welding process for field joining of tubulars for expandable applications The present invention generally relates to methods of connecting two expandable tubulars. In one aspect, the method includes flash welding the ends of the expandable tubulars together. Thereafter, the connected tubulars are lowered into the wellbore for expansion. T... | 08/30/2005 |
| 6886470 | Rail welderhead shear apparatus A flash butt rail welding welderhead combines in a single unit, the ability for the three functions of rail pulling, flash butt forging and maintaining the “after forged” displacement without any change in platen position such that shearing may be accomplished i... | 05/03/2005 |
| 6852940 | Welding device A welding device for welding together two rails of a track and producing a welded joint is composed of two halves. An air nozzle and a temperature sensor are mounted on one of the halves. Via a cooling opening of the air nozzle, a glowing-cooled hot welded joint can... | 02/08/2005 |
| 6787726 | Rail welding apparatus incorporating rail restraining device, weld containment device, and weld delivery unit A rail restraining, robotic welding and weld delivery device uses a frame for supporting a welding head with a clamp for restraining a first rail end and a second rail end and a base twist assembly for aligning said first end and second end. An interconnected weld c... | 09/07/2004 |
| 6762390 | Rail welding device A rail welding device arranged for mobility along a track direction for effectuating the electric resistance welding of two track rails, comprising a control unit, and two halves of the device movable in the track direction, each half of the device being aligned wit... | 07/13/2004 |
| 6515249 | Method of railroad rail repair A method of repairing a damaged railroad rail comprising the steps of: identifying a defect in the rail, removing the portion of the rail having a defect and leaving two truncated rail ends, preparing the truncated rail ends for welding, and welding the t... | 02/04/2003 |
| 6396020 | Rail welding apparatus incorporating rail restraining device, weld containment device and weld delivery unit A rail restraining (1) and weld delivery device (100) uses a frame for supporting a welding head with a clamp (3) for restraining a first rail end and a second rail end and a base twist assembly (17) for aligning said first end and second end. An intercon... | 05/28/2002 |
| 6152349 | Welding mold and preheating device intended to cooperate with the welding mold The present invention concerns a welding mold for butt welding two metal parts by casting a molten filler metal in an imprint defined by a mold. At least one of the components of the mould includes a spacer member shaped and sized so that it can be engage... | 11/28/2000 |
| 5992329 | Machine for welding at least one run of rail A machine for welding rail comprises a rail vehicle with at least one energy generator set, a programmable automatic control unit and a raised chassis disposed between the bogies of the vehicle. The chassis supports at least one welding unit, grinders, tw... | 11/30/1999 |
| 5850962 | Casting mold for fusion welding of two workpieces In order to reduce the residual stresses which occur in the region of a fusion weld of two rail ends (1,2), in order to reduce, in particular to make uniform, the cooling-down rate and--associated with this--the crystallization process within the solidify... | 12/22/1998 |
| 5469791 | Mobile machine for preparing rails for welding A mobile machine for preparing rails for welding comprises an elongated bridge-like machine frame extending in a longitudinal direction, the machine frame having an upwardly recessed frame portion extending between opposite ends of the machine frame and d... | 11/28/1995 |
| 5419484 | Apparatus and process for aluminothermic welding The disclosure relates to a multi-part mold for aluminothermic welding without preheating of metal parts, said mold having internally employed a welding cavity and two rising channels with variable cross-sections along their height, the central part of we... | 05/30/1995 |
| 5323709 | Demolder A demolder for and a method of separating and removing mold material formed around two rail ends of longitudinally adjacent railroad rails during the use of a thermite weld system to join the rails into a continuous rail. The demolder includes an open-end... | 06/28/1994 |
| 5222435 | Track renewal A track is progressively renewed in an operating direction by continuously lifting the used track rails from the used ties, replacing the old ties by new ties and laying new rails on the new ties. Before the new rails are laid, adjoining ends thereof are ... | 06/29/1993 |
| 5195436 | Process for continuous welding of track sections, and set of wagons especially equipped for its implementation A process for the continuous welding of railroad rail sections (3) during the laying down thereof, involves a particularly equipped train set (5-5'), formed by one or more trucks (5,5') having a lowered load platform inserted into the operating train, bet... | 03/23/1993 |
| 4800817 | Rail joint alignment system and method of connection An alignment system and method are described for aligning and supporting facing ends of two rails so that they can be secured together (e.g., by welding or bonding). The alignment system includes a pair of lift plates to support the ends of the rails. The... | 01/31/1989 |
| 4716836 | Suspended rail welder A suspended rail welder which includes, generally, two clamping units which are supported by a beam which is affixed to a boom for raising and lowering the rail welder to the rails which are to be welded together. The two clamping units are coupled to one... | 01/05/1988 |
| 4641818 | Apparatus for adjusting two butt-ends of rails to be connected by welding Apparatus for adjusting two butt-ends of rails to be connected by welding comprises a rigid structure having two aligned support plates one for each rail. Each support plate comprises a non-adjustable retaining press and an adjustable retaining press. The... | 02/10/1987 |
| 4414454 | Method of welding continuous rails and apparatus therefor A method and apparatus for forming a continuous railroad track including a mobile welding plant which is comprised of, for example, a string of flat cars for transporting a number of already formed continuous rails, another flat car or the like carrying m... | 11/08/1983 |
| 4348959 | Rail gap adjusting device A device for adjusting the butt-ends of two rails to be connected has a fixed frame for enclosing one of the two rails and two integral bars, parallel to the rails, and extending from the fixed frame toward the other rail. Two movable frames are slidable ... | 09/14/1982 |
| 4320708 | Devices for adjusting two butt ends of rails to be connected by welding A device for adjusting two butt ends of rails to be connected by welding comprises a rigid structure which is formed by two support plates. The support plates are aligned and interconnected by a concave part and which is able to be disposed horizontally s... | 03/23/1982 |
| 4313382 | Setting arrangement for alignment and gap between two rail ends An improved apparatus for aligning and setting the gap between two rail ends comprises a rigid housing overlapping the two rails and providing an access area around the two rail ends. A first pair of presses and a second pair of presses are mounted in lin... | 02/02/1982 |
| 4272664 | Mobile rail welding machine A mobile rail welding machine comprises a frame, two undercarriages supporting the frame, a hydraulically driven flash butt welding unit for welding abutting rail section ends of a track rail mounted on the frame intermediate the undercarriages, a hydraul... | 06/09/1981 |
| 4236453 | Mobile rail welding machine A mobile rail welding machine comprises a frame, a hydraulically driven flash butt welding device, a "Thermit" welding unit and preferably an electric arc welding device mounted on the frame for selectively flash butt welding, "Thermit" welding or arc wel... | 12/02/1980 |
| 4232610 | Mobile apparatus for laying railway track A mobile apparatus for laying railway track comprises a car running on the rails and a carrier frame with a track on which a power-driven trolley is mounted. The trolley includes a beam for carrying and laying an assembled section of the railway track inc... | 11/11/1980 |
| 4063720 | Automatic unplugging aluminothermic welding crucible The invention relates to an automatic unplugging aluminothermic welding crucible comprising a crucible per se made of refractory material, shaped generally as a truncated cone with a vertical axis, said cone tapering inwardly to the lower base thereof and... | 12/20/1977 |
