Elevation-type stair structure
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United States of America Patent
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Jul 30, 2019
Grant Date -
Nov 8, 2018
app pub date -
Apr 25, 2018
filing date -
May 2, 2017
priority date (Note) -
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Abstract
An elevation-type stair structure comprises: a first stair module, including plural first treads and a first wall surface having a first door and a second door; a second stair module, including plural second treads and a second wall surface having a third door and a fourth door; and an elevator module, enabling the first stair module or the second stair module to be ascended or descended, when the second stair module is ascended for being above a location defined at one side of the first stair module, the second door is aligned with the third door, when the second stair module is descended for being below a location defined at one side of the first stair module, the first door is aligned with the fourth door. Accordingly, a user can walk through the first stair module and the second stair module then return to an original location.
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Family
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