Dust-tight hatch closure assembly
US4469152A · kind A · utility
14Cited by
8References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 25, 1979 |
| Grant date | Sep 4, 1984 |
| Priority date | — |
| Expiry date | Oct 25, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/921
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A dust-tight hatch closure assembly for filling railway covered hopper cars having a filling means and a pneumatic seal in the form of an inflatable annulus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.