Streamline coal slurry letdown valve
US4413646A · kind A · utility
39Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 1981 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | May 14, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86791
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A streamlined coal slurry letdown valve is featured which has a two-piece throat comprised of a seat and seat retainer. The two-piece design allows for easy assembly and disassembly of the valve. A novel cage holds the two-piece throat together during the high pressure letdown. The coal slurry letdown valve has long operating life as a result of its streamlined and erosion-resistance surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.