Rolling stairway
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 2, 1995
Grant Date -
N/A
app pub date -
Oct 25, 1993
filing date -
Oct 25, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rolling platform ladder includes a frame supporting a stairway and a flat work platform area at the top of the stairway. The frame includes a base portion that has a cantilevered front area for preventing tipping over if the platform is overloaded. A main structural support column is placed at the center portion of the platform and extends down at an angle toward the rear of the base. At least a portion of the platform is positioned in front of the column during use. This configuration enables at least a portion of the platform to be positioned over machines, conveyors and over obstructions. A portion of the base extends in front of the frame so that it can extend under objects elevated slightly above a work surface such as an elevated conveyor or machine.
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Cited Art Landscape
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