Gate valve seal system
US4645179A · kind A · utility
17Cited by
6References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1985 |
| Grant date | Feb 24, 1987 |
| Priority date | — |
| Expiry date | Oct 1, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/6167
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
This invention relates to an improved gate valve having floating seal elements which are back-relieving and reversible for long-term permanent sealing under varied pressure conditions. The sealing elements are mounted in unrestrained relation in juxtaposed recesses in the fluid passage facing the movable gate with annular gaskets facing both the gate and the recesses for improved self-aligning sealing engagement therewith. The sealing elements and their annular gaskets may be reversed, interchanged, or readily replaced as desired, the valve structure being especially useful for inherently fail-safe slab type gate valves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.