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| Number | Title | Issue Date |
| 7377471 | Method and system for opening and securing a railroad frog A method and system are provided for opening and securing a railroad frog. The system is provided with a body member and a plurality of attachment members, which are selectively securable with the body member. The attachment members are structurally configured to se... | 05/27/2008 |
| 5782437 | Spring rail frog having bendable rail with modified cross-section A spring rail frog is disclosed that includes a movable wing rail, a fixed wing rail and a nose rail. The movable wing rail is provided with a bendable portion and a non-bendable portion. The bendable portion can include any or all of a reduced width base... | 07/21/1998 |
| 5595361 | Wing rail hold-down A railroad trackwork spring frog installation having a conventional wing rail with attached wing rail horn fitting is provided with an improved co-operating hold-down comprising a weld block element component, a separate, readily replaceable, riser compon... | 01/21/1997 |
| 4917339 | Reversing device for swivelable rails or movable frogs within the crossing area of a railway switch In a reversing device for rails which are swivelable around a swivelling axis, or for movable frogs within the crossing area of a railway switch, the swivelable rails or, respectively, the movable frogs are supported in their position being in alignment w... | 04/17/1990 |
| 4637578 | Railroad frog having movable wing rails A railroad frog has either a cast or rail-built point, resting on a baseplate which is fastened to ties. A pair of heel rails are attached to the point, to the ties and to traffic rails. A pair of movable wing rails extend from the toe of the frog to a lo... | 01/20/1987 |
| 4168817 | Rail switch A rail switch in which two wing rails are engageable with a frog in alternation, characterized in that guide members are provided, which are held in position relative to the wing rails and extend under and are engageable with the frog or parts rigidly con... | 09/25/1979 |
| 4159090 | Railway switch for vignoles rails Railway switch for Vignoles rails, comprising a frog tip and a pair of wing rails arranged for swivelling movement, one of said wing rails engaging the frog tip in its end position and being supported in this position in direction of engaging the frog tip... | 06/26/1979 |
| 3977635 | Railway switch for Vignoles rails Railway switch for Vignoles rails, comprising a frog tip and wing rails arranged for swivelling movement, each of the wing rails engaging the frog tip in a respective end position and being supported in this position by supporting members resting against ... | 08/31/1976 |
