Lightweight hopper car
US5934200A · kind A · utility
13Cited by
7References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1997 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Apr 11, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61D7/02
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A lightweight hopper-type rail car provides for a smooth exterior surface so as to minimize aerodynamic drag thereon when the car is in motion. The railcar includes a cross ridge arrangement which greatly increases the fabrication efficiency of the car as well as providing a smooth interior surface so as to allow the maximum release of bulk material contained within the car.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.