| Transportation Technology Center, Inc. Patent applications |
| Patent application number | Title | Published |
|---|
| 20110189047 | RAILROAD RAIL STEELS RESISTANT TO ROLLING CONTACT FATIGUE - Railroad rail steels having a pearlitic structure and containing 0.720 to 0.860 wt % carbon; 1.000 to 1.280 wt % manganese; 0.450 to 1.000 wt % silicon; 0.010 to 0.100 wt % copper; 0.150 to 0.280 wt % chromium; 0.0010 to 0.0500 wt % aluminum; 0.050 to 0.120 wt % nickel; 0.100 to 0.260 wt % molybdenum; 0.100 to 0.210 wt % vanadium; 0.0010 to 0.0065 wt % nitrogen; 0.0010 to 0.0080 wt % phosphorus; 0.0010 to 0.0040 wt % sulfur; and 0.0100 to 0.0350 wt % niobium with the remainder of said steel being iron, can be used to make railway rails that are particularly resistant to rolling contact fatigue and, hence, shelling. | 08-04-2011 |
| 20100090018 | RAIL JOINT ASSEMBLY USING EMBEDDED LOAD TRANSFER KEYS AND METHOD THEREFOR - A rail joint assembly joining the ends of two rails together includes a pair of joint bars. Each joint bar having one side configured to the rail web side. Mechanical fasteners mount the joint bars to the web sides. Pairs of load bearing keys are embedded in web counter bores at predetermined depths into the webs and embedded in adjacent joint bar counter bores at predetermined depths into the joint bars. The pairs of keys in the webs and the joint bars transfer railway loads through the joint and substantially strengthen the rail joint assembly. | 04-15-2010 |
| 20090134647 | RAILROAD WHEEL STEELS HAVING IMPROVED RESISTANCE TO ROLLING CONTACT FATIGUE - Steels having a pearlitic structure and containing 0.65 to 0.80 weight percent carbon, 0.90 to 1.10 weight percent silicon, 0.85 to 1.15 weight percent manganese, 0.001 to 0.030 weight percent phosphorus, 0.009 to weight percent niobium, 0.05 to 0.15 nickel, 0.20 to 0.30 weight percent molybdenum, 0.10 to 0.30 weight percent vanadium and 0.005 to 0.040 weight percent sulfur with the remainder of said steel being iron and incidental impurities, can be used to make railway wheels that are particularly resistant to rolling contact fatigue and, hence, shelling. | 05-28-2009 |
| 20090053095 | RAILROAD STEELS HAVING IMPROVED RESISTANCE TO ROLLING CONTACT FATIGUE - Steels having a pearlitic structure and containing 0.6 to 0.8 wt. % carbon; 0.70 to 1.00 wt. % silicon and 0.8 to 1.2 wt. % manganese can be further alloyed with chromium, molybdenum, vanadium, niobium and/or copper and used to make railway wheels, railway rims and railway rails that are particularly resistant to rolling contact fatigue and, hence, shelling. | 02-26-2009 |
| 20090051182 | RAILROAD WHEEL STEELS HAVING IMPROVED RESISTANCE TO ROLLING CONTACT FATIGUE - Steels having a pearlitic structure and containing 0.65 to 0.80 weight percent carbon, 0.90 to 1.10 weight percent silicon, 0.85 to 1.15 weight percent manganese, 0.001 to 0.030 weight percent phosphorus, 0.009 to 0.013 weight percent niobium, 0.05 to 0.15 nickel, 0.20 to 0.30 weight percent molybdenum, 0.10 to 0.30 weight percent vanadium and 0.005 to 0.040 weight percent sulfur with the remainder of said steel being iron and incidental impurities, can be used to make railway wheels that are particularly resistant to rolling contact fatigue and, hence, shelling. | 02-26-2009 |
