Ball valve having retractable sealing member
US6425570B1 · kind B1 · utility
2Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 20, 2000 |
| Grant date | Jul 30, 2002 |
| Priority date | — |
| Expiry date | Oct 20, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K5/14
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ball valve having an upstream seat (92) with the seat actuated by outside pressure (14, 16). Retraction members (100, 102) continuously urge seat (92) to a retracted position out of sealing engagement with the ball. A sealing member (104) fits loosely within an annular recess in the seat (92).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.