Bidirectional pressure-assisted valve seal
US4005848A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 11, 1975 |
| Grant date | Feb 1, 1977 |
| Priority date | — |
| Expiry date | Feb 11, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K1/2266
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Disclosed herein are valve seals wherein an annular seal member is retained in an annular recess in a valve body wall, the seal member being axially flexible. A resilient annular garter spring is provided between the seal member and a converging surface on a wall of the valve body recess. When a valve employing this seal arrangement is closed, differential pressure urging the seal member in a downstream direction tends to deflect the seal member around the garter spring, while the garter spring tends to coact with the converging surface of the recess to provide a radially inwardly moving fulcrum for forcing the seal member into tighter engagement with a valve closure member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.