Straight-way & shut-off valve
US4674537A · kind A · utility
33Cited by
4References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 18, 1986 |
| Grant date | Jun 23, 1987 |
| Priority date | — |
| Expiry date | Mar 18, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86743
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention is directed to a straight-way and shut-off valve in which identical discs are arranged in face-to-face contact to provide a fluid-tight seal therebetween and means are provided whereby fluid is not trapped between the central rotatable disc and an outer disc so that upon expansion of the fluid, the discs do not shift outwardly due to axial pressure that would break the fluid-tight seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.