Fire-resistant gate valve
US4568062A · kind A · utility
20Cited by
10References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1983 |
| Grant date | Feb 4, 1986 |
| Priority date | — |
| Expiry date | Mar 7, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1797
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A stem-operated fire-resistant gate valve including an improved metal-to-metal stem backseat fusible ring assemblies for facilitating automatic stem backseating at pre-selected temperatures, spring enhancement of the backseating procedure, and an improved metal-to-metal gate seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.