Railroad car having cold formed center sill
US7478599B1 · kind B1 · utility
3Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2000 |
| Grant date | Jan 20, 2009 |
| Priority date | — |
| Expiry date | Sep 18, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49622
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A railroad car having a center sill 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 cold formed 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.