One piece center sill for a railroad car
US6769366B1 · kind B1 · utility
7Cited by
11References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1996 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Feb 6, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49622
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A one-piece center sill for a railroad freight 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.