Collapsible staircase
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United States of America Patent
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Nov 27, 2012
Grant Date -
Oct 6, 2011
app pub date -
Apr 6, 2010
filing date -
Apr 6, 2010
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Embodiments of the invention described herein pertain to a collapsible staircase comprising a plurality of tread assemblies. Each tread assembly is disposed adjacent to at least one of another of the tread assemblies and includes a tread plate and a first and a second telescoping support member attached to a rear surface of the tread plate. The first and second telescoping support members of each tread assembly are operable to slideably engage the telescoping support members of the adjacent tread assemblies for adjusting a height of the staircase and for defining a substantially fixed angle between the tread plates of each of the tread assemblies.
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