Ball valve
US5927687A · kind A · utility
Inventor
Key dates
| Filing date | Sep 24, 1997 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Sep 24, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K5/0689
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ball valve for shutting off pipelines carrying liquid, gaseous and solids-laden media, particularly those of large nominal diameters, includes a housing containing a ball provided with at least one bore and supported in a rotatable fashion in the housing by means of a spindle, annular seals located before and after the ball in the direction of flow in the housing which seal off the inlet side from the outlet side, one additional annular seal which rests upon the surface of the ball in the housing in each of the planes perpendicular to the spindle axis above and below the bore, as well as above and below the seals which are placed before and after the ball in the flow direction, in such a way that each of the planes which are spanned by them and are parallel with each other is perpendicular to the planes spanned by the sealing rings placed before and after the ball.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.