Automatic sampler for liquid chromatograph
US8522627B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 25, 2011 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Dec 20, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N30/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pump portion for taking in and discharging solutions includes a first plunger pump with a small capacity and a second plunger pump with a large capacity. Intake ports of both the plunger pumps are connected in parallel to a common port of a switching valve with a first three-way valve interposed therebetween. The first three-way valve connects the intake port of one of the plunger pumps to the switching valve. Discharge ports of both the plunger pumps are connected in parallel to one port of the switching valve with a second three-way valve interposed therebetween. The second three-way valve connects the discharge port of one of the plunger pumps to the switching valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.