Rotary injection valve with internal sample load channel
US10466211B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 2017 |
| Grant date | Nov 5, 2019 |
| Priority date | — |
| Expiry date | Mar 17, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/207
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A rotary injection valve used in chromatography includes a stator having a stator sealing surface and a sample load channel disposed inside the stator body below the stator sealing surface. The valve can have a reduced number of ports thereby allowing faster integration of the valve into a chromatographic system. Flow restriction is reduced compared to valves that use an external sample loop for a similar volume of sample. The lack of stator ports for the sample load channel eliminates the potential for carryover created by external valve couplings. Another advantage is the reduction of surface wear achieved by locating the sample load channel below the stator sealing surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.