Device for inspecting, sampling or extracting at a precise spot beneath a slab
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United States of America Patent
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Oct 4, 2005
Grant Date -
N/A
app pub date -
Mar 4, 1999
filing date -
Mar 5, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A tool (7) for sampling or extracting the contents of a pit (4) is suspended from a cable (8) passing through a narrow opening (3) in a slab (2) covering the pit. A crosspiece (13) hooked to guide cables (11) which converge on it makes it possible to displace the lifting cable (8) under the slab (2) according to different movements imposed by winches (10). Thus it is possible to move the tool (7) to the desired point with great precision and without having to descend into the pit (4).
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