Ladderway system for underground raises
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United States of America Patent
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May 26, 2015
Grant Date -
Nov 15, 2012
app pub date -
Dec 24, 2010
filing date -
Jan 13, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
An improved ladderway system 30 for an underground raise. The system comprises an elongate tube 32 made of a suitably rigid plastics material and adapted to be received in the raise. The tube has a series of steps 34 moulded into an interior side wall thereof so as to form a ladder extending substantially the full length of the tube 32.
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