Ladder locking mechanism
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United States of America Patent
Stats
-
Mar 11, 1986
Issued Date -
N/A
app pub date -
Apr 16, 1984
filing date -
Jan 21, 1982
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 progressible 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 which when the ladder is extended and open.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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