Railroad frog assembly with multi-position holdback
US6164602A · kind A · utility
8Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1999 |
| Grant date | Dec 26, 2000 |
| Priority date | — |
| Expiry date | Feb 17, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B7/14
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
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, and that automatically deactivates the multi-position holdback subassembly and releases the spring wing rail from retention in an open condition and for complete closing after the last railcar wheel has passed through the frog assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.