Trunnion type ball valve
US4683906A · kind A · utility
9Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1985 |
| Grant date | Aug 4, 1987 |
| Priority date | — |
| Expiry date | Nov 29, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7036
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A trunnion type ball valve arranged so that biasing means is not needed to establish a seal between the valve seats and the ball when the valve is in the closed position. There is no load on the valve seats in the open position and a sufficient load in the closed position to effect a fluid seal in the closed position. The valve seats are movably mounted in the valve body so that they are displaced during opening and closing movement, but center themselves in the open and closed positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.