Bi-directional sealing valve
US4890643A · kind A · utility
11Cited by
17References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 6, 1989 |
| Grant date | Jan 2, 1990 |
| Priority date | — |
| Expiry date | Feb 6, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87981
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
There is disclosed a bi-directional sealing valve having a pair of ball type closure members mounted in the flowway through the body of the valve, one to control flow in one direction and the other to control flow in the opposite direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.