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| Number | Title | Issue Date |
| 6340140 | Railroad frog for switch points and crossings The rigid frog for switch points and crossings with two wing rails (1, 2) and a frog point (3, 6, 4, 5) arranged therebetween, which forms with the wing rails switch openings (11) that run at an acute angle relative to each other, is characterized in that... | 01/22/2002 |
| 5845881 | Railroad trackwork intersections A railroad trackwork intersection assembly such as a crossing intersection or a turnout intersection is provided with at least one flange-bearing frog subassembly which has railcar wheel flangeways of uniform depth throughout the frog planform that co-ope... | 12/08/1998 |
| 5531409 | Flange bearing bolted rail frog for railroad turnouts and crossings A bolted rail railroad frog designed to support a railroad wheel to roll through the frog on its flange rather than requiring its tread to jump across a flangeway gap. The frog is comprised of paired rail sections with a flangeway filler bar disposed ther... | 07/02/1996 |
| 4986498 | Device for determining the condition of railway switches or railway crossings A device for determining the condition of railway switches or railway crossings by monitoring the end position of tongue rails (2), said device having a sensor (18) within the area of the theoretical frog point (17) of a frog (8), said sensor giving on oc... | 01/22/1991 |
| 4824055 | Railroad FROG An improved railroad FROG of nearly shrink free casting and method of forming is disclosed. The FROG is comprised of a triangular shaped top area with an actual FROG point at the center of the casting, widening at one end to a heel and heel extension with... | 04/25/1989 |
| 4516504 | Cross-over track structure for wheeled pallets A conveying and storage system for wheeled pallets has tracks each formed by a pair of generally parallel rails. The pallet has grooved wheels at one side for riding on the upper edge of one rail and a roller on the other side for riding on the upper edge... | 05/14/1985 |
| 4469299 | Railway turnouts According to the invention a railway turnout comprises two wing rails and a point, carried on a frog, which includes a nose, the running surface of which is substantially co-planar with the running surfaces of the rail of the turnout, the wing rails being... | 09/04/1984 |
| 4224875 | Static switching apparatus for passenger vehicle A static switching apparatus for a track vehicle includes a main line track and a switch track which at a switching junction both include a conventional track rail and a specially constructed rail. A switching cam including cam faces is positioned at the ... | 09/30/1980 |
| 4081162 | Railroad frogs Wheel loads on the running surfaces of a frog point and its (cast) integral wings are distributed to the ties by a bottom wall boxing in the side walls which support those running surfaces and by strategically located center ribs.... | 03/28/1978 |
| 4015805 | Railway switch or railway crossing Railway switch for transferring railway vehicles from a main track to a siding and, respectively, crossing of a siding with a main track, the switch or crossing comprising a frog in which the rail of the main track is uninterrupted, noting that the portio... | 04/05/1977 |
