Hatch cover and locking structure
US4570816A · kind A · utility
31Cited by
7References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1984 |
| Grant date | Feb 18, 1986 |
| Priority date | — |
| Expiry date | Oct 10, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/202
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The hatch of a lading container, such as the hopper of a covered hopper car, is sealed by a hatch cover having a locking arrangement which prevents the hatch cover from being blown open by pressure within the hopper when the locking arrangement is unlocked. An over-center locking arm has two spaced catches which co-act with two latches on a latching arrangement to selectively provide a sealed, a pressure blow-off, and a hatch open position. A rotative adjustment is provided to enable adjustment of the sealing pressure of the hatch cover on the hatch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.