Valve stem-to-bonnet backseat
US4510960A · kind A · utility
12Cited by
3References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1983 |
| Grant date | Apr 16, 1985 |
| Priority date | — |
| Expiry date | Sep 30, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1819
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A stem-operated fire-resistant gate valve including an improved metal-to-metal stem backseat a eutectic ring assembly for facilitating automatic stem backseating at pre-selected temperatures, spring enhancement of the backseating procedure, and a lost motion connection between the valve stem and the valve closure element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.