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| Number | Title | Issue Date |
| 7416622 | Method and system for thermal treatment of rails In order to obtain a fine-lamellar perlite structure in the edge region of the heads of rails (1), especially hot-rolled rails for carriageways or railways, by specific thermal treatment during cooling from the rolling heat without the formation of bainite, p... | 08/26/2008 |
| 7253380 | Induction heating of rail welds An apparatus (10) and method for preheating welds uses a centered induction plate (12) having preferably a plurality of induction coils (30, 32) to impart the generation of heat in the materials to be welded (14), being interactively cont... | 08/07/2007 |
| 6872264 | Road wheel composition and method for manufacturing road wheel using the same A road wheel composition having high surface hardness and high strength, which is manufactured by a heat treatment of a metal powder containing Fe as a main component, C, Si, Mn, P, S, Al, Ti, N, Cr, and B, and a method for manufacturing a road wheel for an automobi... | 03/29/2005 |
| 6797084 | Method of manufacturing case hardened journal cross for use in a universal joint An apparatus for manufacturing a case hardened journal cross includes an inductor having an open side to allow the journal cross to be inserted and withdrawn from the induction process with relative ease. The conductive frame of the inductor is shaped in a cross-lik... | 09/28/2004 |
| 6221185 | Method for manufacturing components by critical formation of light metal strip The invention relates to a method for manufacturing components from critical cold forming of light metal strip, preferably naturally hard Al alloys of the AlMg or AlMg--Mn types, in which the desired component is manufactured from the strip by at least on... | 04/24/2001 |
| 6168676 | Rail refurbishing process A method and apparatus for repairing microcracks in the metal of a railway track. A high power laser, or equivalent energy beam generator, is moved along a track. The high power laser directs an intense beam of energy towards microcracks in the rail, a va... | 01/02/2001 |
| 5250126 | Method for manufacturing a rail for use in a linear motion rolling contact guide unit A method for manufacturing a rail for use in a linear motion rolling contact guide unit is provided. A rail intermediate product having a top surface, a pair of side surfaces, each formed with a guide groove portion, and a bottom surface is provided by dr... | 10/05/1993 |
| 5004510 | Process for manufacturing high strength railroad rails Steel rails having reduced camber and improved wear resistance provided by enhanced rail head strength and hardness level decreasing uniformly from the rail head surface to a depth of 15 to 25 mm. are produced by a method and apparatus in which the rail i... | 04/02/1991 |
| 4749419 | Method for heat treating rail A method and assembly for heat treating a railway rail is provided which maintains balanced thermal and metallurgical deformations about rail neutral axes during the heat treating process to produce a substantially straight rail with only minimal requirem... | 06/07/1988 |
| 4714500 | Method for thermal treatment of pearlitic rail steels The present invention relates to a method for thermal treatment of pearlitic rail steel. For increasing strength and wear resistance steels with the claimed composition are produced with a fine lamellar pearlite structure by heat treatment. During the fir... | 12/22/1987 |
| 4201602 | Rail hardening machine and method A technique for heat treating the upper surface of the head of an in situ rail is disclosed. A car carrying an induction heater followed by an air quencher and then an air and water quencher is passed along the track. In this way the upper surface of the ... | 05/06/1980 |
