Weight-releasing ladder lockstep
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United States of America Patent
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Nov 9, 2010
Issued Date -
N/A
app pub date -
Mar 14, 2006
filing date -
Mar 15, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A novel lockstep mechanism for a rolling ladder is described. The weight-releasing ladder lockstep allows a ladder to be relocated on wheels but when a person climbs the ladder, the front wheels are automatically retracted and the ladder rests firmly with its front feet on the floor. When in the climbing (stationary) position the front wheels of the lockstep are retracted and the ladder rests on the lockstep's feet. When in the rolling position, the ladder is tilted slightly back on its rear wheels and the wheels of the lockstep are pushed down to allow the ladder to roll. When in the rolling position, the lockstep wheels are held in place via a latch which is isolated from rolling vibrations through pivoting shock links and springs.
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