Railroad spring frog assembly
US6224023A · kind A · utility
7Cited by
8References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1999 |
| Grant date | May 1, 2001 |
| Priority date | — |
| Expiry date | Jan 22, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B7/14
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An improved railroad trackwork spring wing frog is provided with a rail-closer having a single compression spring whose reaction forces are applied to the frog spring wing rail through movable linkages that are each connected to the spring wing rail at different spaced-apart position and that each abut the single compression spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.