Method and apparatus for keeping railway switches free from snow
US4674718A · kind A · utility
7Cited by
8References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1984 |
| Grant date | Jun 23, 1987 |
| Priority date | — |
| Expiry date | Nov 13, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B7/20
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a method of preventing snow from bedding into railway switches, air is blown into the area between the stock rail and the movable rail in a switch, and substantially horizontally in a direction obliquely outwards towards the open end between the stock rail and the movable rail. An apparatus for carrying out this includes a blower assembly (8) between the rails in a railway switch, the assembly being supplied by a fan unit (20) and adapted to provide a substantially horizontal air discharge directed obliquely outwards towards the open end between the stock rail and the movable rail in their separated positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.