Spring rail frog
US4624428A · kind A · utility
28Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 20, 1984 |
| Grant date | Nov 25, 1986 |
| Priority date | — |
| Expiry date | Sep 20, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61L11/02
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A railroad spring frog assembly for trackwork installations includes a rigid rail and a flexible spring wing rail. The flexible spring wing rail is rigidly affixed between one end which engages a wing point rail and the other end which connects to a closure rail at the toe end of the frog support means. When a rail car enters the frog and a wheel flange engages the spring wing rail to pass between it and the long point rail the spring wing rail bends away from the long point rail to define a flangeway therebetweeen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.