TELESCOPIC MINE ROOF SUPPORT
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United States of America Patent
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Issued Date -
Jul 2, 2015
app pub date -
Mar 16, 2015
filing date -
Aug 30, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A longitudinally yieldable support for underground roof support includes a first support section with a first elongate outer shell filled with a solid compressible filler material and a second support section filled with a second solid compressible filler material with a second elongate outer shell extending above the first elongate outer shell. The second support section has density that is greater than a density of the first solid compressible filler material. A pair of attachment members are coupled to the second elongate outer shell and are configured for lifting the second elongate outer shell relative to the first elongate outer shell and for securing the second elongate outer shell relative to the first elongate outer shell once lifted.
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