Adjustable ladder
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 20, 1999
Grant Date -
N/A
app pub date -
Apr 17, 1998
filing date -
Apr 19, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An adjustable ladder includes a base ladder and at least one extendable ladder movably fastened on the base ladder, the extension of which ladder can be locked by a locking bracket pivotally fastened on the extendable ladder. Locking is operated by a cable line running over guide rollers that are fixed on the base ladder. The guide rollers are arranged on the base ladder below a rung thereof and can be fastened by a first plug element serving as a mounting. The mounting can be formed of a wire or rod-shaped blank and loops around a substantial portion of the hollow section of the rung. The mounting has a bent portion extending in the direction of a rung axis and extending through a hollow tube supporting the guide roller. The bent portion is fastened to a spar of the base ladder and extends through the spar. The bent portion projects with a first end piece from an outer cheek of the spar so far that the end piece can be fixed in the direction of the rung axis.
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Cited Art Landscape
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