Invention Grant
- Patent Title: Rotary injection valve with internal sample load channel
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Application No.: US16084456Application Date: 2017-03-17
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Publication No.: US10466211B2Publication Date: 2019-11-05
- Inventor: Sylvain G. Cormier
- Applicant: WATERS TECHNOLOGIES CORPORATION
- Applicant Address: US MA Milford
- Assignee: WATERS TECHNOLOGIES CORPORATION
- Current Assignee: WATERS TECHNOLOGIES CORPORATION
- Current Assignee Address: US MA Milford
- Agency: Schmeiser, Olsen & Watts LLP
- Agent William G. Guerin
- International Application: PCT/US2017/022858 WO 20170317
- International Announcement: WO2017/161216 WO 20170921
- Main IPC: G01N30/20
- IPC: G01N30/20 ; F16K11/085 ; G01N30/06 ; G01N30/22

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.
Public/Granted literature
- US20190120799A1 ROTARY INJECTION VALVE WITH INTERNAL SAMPLE LOAD CHANNEL Public/Granted day:2019-04-25
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