Disappearing ladder
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 21, 1989
Grant Date -
N/A
app pub date -
May 26, 1988
filing date -
May 26, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ladder includes a pair of spaced apart rails having upper and lower ends, and a plurality of substantially identical slats located between the rails. Each slat has a support axle or the like engaging the rails, and defining an axis of rotation for the slat. An actuating bar or rod is operatively connected to each of the slats for selectively and simultaneously rotating the slats from a closed position wherein the slats are substantially coplanar and parallel to the rails, to an open position wherein the slats are oriented transversely to the rails and thus form steps. The actuating bar or the like is restrained in the normally closed position. A trigger mechanism is located at the upper end of the rails and operatively connected to the actuating bar, for selectively releasing the restraining member, whereby the slats can rotate to the open position for use.
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Cited Art Landscape
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