Method of cold forming center sill for a railcar
US6119345A · kind A · utility
10Cited by
21References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1997 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Oct 17, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49622
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A center sill for a railroad car formed by cold rolling a flat sheet of steel into a rectangular configuration. One of the embodiments includes strengthening flanges and another includes ribs. The center sill may be formed of a single cold formed section or a pair of cold formed sections joined by a single longitudinal weld seam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.