Long lifetime fluid switching valve
US6453946B2 · kind B2 · utility
27Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2001 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Apr 20, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86533
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A rotary fluid switching valve has facewise adjacent rotor and stator faces of materials that result in an exceptionally long lifetime. One face is of a fluorocarbon-containing polymer, while the other face is Tungsten Carbide/Carbon (WC/C). The WC/C coating is preferably on a metal stator which has machined ports to accept tubing fittings that connect to stator passages that extend to the interface of stator and rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.