Arrangement with a hollow mandrel for introducing drainage ribbons in a subsoil
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United States of America Patent
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Nov 12, 2019
Grant Date -
Jun 13, 2019
app pub date -
Jun 19, 2017
filing date -
Jun 17, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to an arrangement for vertically introducing drainage ribbons into a subsoil, comprising an hollow mandrel and a drainage ribbon that is fed through the mandrel, wherein the mandrel comprises a permanent section with a first elongate mandrel profile and a mandrel drive, and a replacement section at the end of the mandrel, wherein the replacement section comprises a second elongate mandrel profile that is joint with the end of the first mandrel profile by means of a weld, a bottom face at the bottom end of the second mandrel profile, and a push bar and a spring that biases the push bar towards its extended position with respect to the bottom face, wherein the mandrel drive comprises a drive cable that extends through the hollow mandrel and that is at one end operatively connected with the push bar by means of a releasable coupling.
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