Adjustable staircase
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United States of America Patent
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Jul 28, 2015
Grant Date -
N/A
app pub date -
Mar 10, 2014
filing date -
Mar 5, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed herein is an adjustable staircase wherein each tread of the staircase is suspended from a tread adjustment mechanism. The tread adjustment mechanism allows the coordinated movement of all the treads to a desired rise height, and allows the positioning of the first tread directly on a supporting surface when it is in a fully lowered position.
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