Convertible fold-up ladder
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United States of America Patent
Stats
-
Jan 15, 1985
Issued Date -
N/A
app pub date -
Sep 29, 1983
filing date -
Jan 26, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A portable folding ladder comprising a plurality of U-shaped modules having a rung and two vertical portions, the modules movable connected to each other, and when opened becoming progressively narrower as they approach the top of the ladder, when folded the narrower modules fitting inside of the next wider modules and locking means to lock the modules in a rigid manner when the ladder is extended and open.
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