Test sample taking arrangement
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United States of America Patent
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Dec 27, 1994
Grant Date -
N/A
app pub date -
Jul 30, 1992
filing date -
Jul 30, 1991
priority date (Note) -
Expired
status (Latency Note)
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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.
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