Device for fixing stock rails in railway switches as well as process for fixing stock rails by means of such device
US4981264A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 1989 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | May 17, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B7/22
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a device for fixing stock rails (1) in railway switches, including a base plate (2) for the stock rail (1) and a sliding chair (3) for the switch tongue mounted on the base plate and comprising an elongated spring element (6) for pressing down the rail foot and preferably having the shape of a plate, the spring element (6) can be introduced, preferably without tension, into a tunnel-shaped recess (5) provided in the sliding chair (3) and extending in a direction approximately normal to the stock rail. The upper edge of the tongue-shaped recess (5) within the sliding chair (3) extends, with the formation of a kink (13), in direction towards the rail foot steeper in upward direction that in an area (11) extending more flatly in front of the kink (13). A separate wedge (10) can, for the purpose of guying the spring element (6) against the rail foot, be driven in within the area (11) of flatter extension of the upper edge at a distance from the kink (13) of the upper edge. On account of the wedges presence, a progressive spring characteristic of the spring element (6) can easily be adapted to the requirements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.