Test sample taking arrangement
US5375478A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 1992 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | Jul 30, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N1/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A test taking arrangement for several separate testing points, especially for ground water and ground air tests, the arrangement has a guiding tube insertable into a ground opening and having a wall which is gas and liquid permeable at least in regions of testing points, transverse walls arranged in the guiding tube between the regions of the testing points and provided with closeable openings for testing conduits and a cylinder-piston unit train, a cylinder-piston unit train having a plurality of coaxially arranged cylinder-piston units and piston rods, a joint drive device coupled with all the piston rods of all the cylinder-piston units of the cylinder-piston unit train, a plurality of suction conduits and pressure conduits, and an alternating valve to provide a connection of each cylinder chamber of the cylinder-piston unit train with a corresponding suction conduits ending in the region of a testing point and with a corresponding one of the pressure conduits leading to a corresponding sample taking point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.