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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 |
| 6286791 | Railroad spring wing frog with hold-open and shock dampening elements An improved railroad trackwork spring wing frog assembly having a selectively releasable hold-open subassembly for the spring wing rail is provided with a combined compressible shock absorber and compression spring that are functionally connected to the a... | 09/11/2001 |
| 6164602 | Railroad frog assembly with multi-position holdback A railroad frog assembly is provided with a spring wing rail multi-position holdback subassembly that continuously retains the spring wing rail in each spring wing rail open position when activated by the wheels of a railcar traversing the frog assembly, ... | 12/26/2000 |
| 6158697 | Railroad frog assembly with latch holdback A railroad frog assembly is provided with a spring wing rail latch holdback subassembly that continuously retains the spring wing rail in a spring wing rail fully open position when activated by the wheels of a railcar traversing the frog assembly, and th... | 12/12/2000 |
| 4953814 | Railway switch comprising a frog having a movable main point and auxiliary point In a railway switch comprising a frog having a movable main and auxiliary point, the main and auxiliary point are formed by using thick-web standard rail sections and asymmetric tongue profiles of smaller height as compared with the thick-web standard rai... | 09/04/1990 |
| 4948073 | Turnout with closing frog A model railroad turnout assembly includes a roadbed element having an entry track thereon. The entry track includes a pair of spaced apart entry rails. Plural, branching discharge tracks are mounted on the roadbed element, each discharge track including ... | 08/14/1990 |
