Railroad frog assembly with latch holdback
US6158697A · kind A · utility
6Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1999 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Feb 17, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61L11/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
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 that automatically deactivates the latch 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.