Fluid-flow isolation and control apparatus and method
US4694860A · kind A · utility
Inventor
Key dates
| Filing date | Feb 4, 1986 |
| Grant date | Sep 22, 1987 |
| Priority date | — |
| Expiry date | Feb 4, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/88062
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Fluid-flow control apparatus and method are disclosed by which magnetically-positionable elements within a rigid body can be externally manipulated using a controlling source of magnetic flux. The relative attractive forces which bias internal magnetic elements into normally-closed sealing engagement are substantially altered by repositioning the magnetic elements in response to the controlling magnet flux. Complete sealing or isolation against back flow through the valve under conditions of net positive outlet pressure is inhibited by the internal double-acting sealing elements which respond in unified manner to the controlling magnetic flux.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.