Extendable pole locking mechanism for ladder stabilizer
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United States of America Patent
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-
Aug 21, 1990
Grant Date -
N/A
app pub date -
Dec 7, 1989
filing date -
Dec 7, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A locking mechanism for fixing the first and second telescopingly disposed tubular poles longitudinally relative to one another includes a longitudinally extending channel of rectangular cross-section projecting radially from the outermost tube and running the length thereof and an elongated rack having a plurality of spaced, parallel teeth projecting radially outward from the inner tubular member and fitted into the channel of the outer tubular member. Affixed to one end of the outer tubular member is a sleeve on which is rotatably mounted a locking ring having a notch extending along the width dimension thereof and a plurality of parallel, arcuate spaced-apart teeth circumferentially adjacent the notch. When the rack on the inner tubular member is aligned with the notch in the ring, the outer and inner tubular poles can slide relative to one another. By then rotating the locking ring, its teeth are made to mesh with the teeth on the rack of the inner tubular member, preventing further longitudinal displacement between the telescoping pole segments.
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