Foldable or retractable ladder for mounting in a ceiling
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United States of America Patent
Stats
-
Sep 17, 1985
Grant Date -
N/A
app pub date -
Jun 22, 1983
filing date -
Nov 3, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a foldable or retractable ladder, especially for use at an opening in the ceiling, for example, to an upper story such as an attic in a building or the like, which ladder comprises a plurality of sections (11,12,13) arranged in operative position of the ladder, in such a manner, that the upper section (13) of the ladder by hinge members (15) is pivotally attached to a frame (14) for the door opening, and the folding-down movement of the ladder is limited by a toggle joint arrangement (16, 17) attached to the upper section (13) of the ladder. The toggle joint arrangement consists of two toggle joints attached to each side of the frame and, respectively, each side rail of the ladder and interconnected at the ladder by means of an axle (18) extending in parallel with the runs.
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Family
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Cited Art Landscape
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