Railroad spring frog assembly
US5810298A · kind A · utility
8Cited by
7References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 1997 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | May 1, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B7/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved railroad trackwork spring wing frog assembly is provided with multiple rail-closer subassemblies, preferably of the nested and counter-wound compression spring-type, that co-operate with the assembly spring wing rail, and that are laterally spaced-apart with respect to each other along the angled rail portion of the frog assembly spring wing rail.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.