Ring protector for preventing tampering of valves positioned inside a railcar dome
US6557477B1 · kind B1 · utility
4Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2002 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Jun 4, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61D5/00
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A ring protector for preventing unauthorized access through the dome port openings of a railcar dome. The ring protector defines a plurality of approximately equally spaced holes. The ring protector has an opened position in which each of the dome port openings is in-line with one of the access holes and a closed position in which each of the port openings is not in-line with one of the access holes. The ring protector is adapted to be rotatable from the opened position to the closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.