Pumping arrangement
US6793815B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 3, 2003 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Mar 21, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N30/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pumping arrangement, for example for liquid chromatography, includes a first liquid reservoir at a first height level, connected via a first hydraulic path to a pumping device; a second liquid reservoir at a second height level, connected via a second hydraulic path to the pumping device; and filtration devices arranged in the first and in the second hydraulic path. Each filtration device includes an outer member forming a first chamber, and an inner member arranged within the outer member and forming a second chamber. The inner member is porous and acts as a filter for liquid flowing from the first chamber to the second chamber. The arrangement ensures efficient filtering and prevents undesired backflow of liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.