Portal ladder
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United States of America Patent
Stats
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Nov 22, 2016
Grant Date -
Mar 5, 2015
app pub date -
Aug 28, 2014
filing date -
Aug 30, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A foldable ladder has multiple ladder segments that fold and unfold relative to each other. Each ladder segment includes one rung element and multiple side rail sections that unfold for deployment to form box-shaped side rails of the ladder. Adjacent ladder segments are connected to each other by hinge joints. The ladder includes locking features at the hinge joints for preventing relative pivoting movement of adjacent ladder segments by more than about 180 degrees.
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Family
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