Curve path of a switch, and track joint using this type of curve path
US6371418B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1999 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Jun 21, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B2204/15
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to a curve path of a switch comprising switch tongues, a main track and a branch track, which curve path from the beginning of the curve path to the end of the curve path is comprised of several portions having different curvatures 1/R, R being the radius of curvature, wherein the coefficient of curvature &agr;=1/R/1/Rmin at the beginning of the curve path (&agr;A) and at the end of the curve path (&agr;E) is selected to be ≧0 and the point, or a region, in which &agr;=1 is located at a relative distance &ngr;=L/Lges≠0.5 from the beginning of the curve path, L being the distance from the beginning of the curve path and Lges being the length of the curve path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.