Combination ladder, ladder components and methods of manufacturing same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Feb 19, 2013
Grant Date -
Jun 28, 2012
app pub date -
Dec 5, 2011
filing date -
Nov 11, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Ladder configurations and components are provided including an outer rail assembly which is longitudinally adjustable relative to an inner rail assembly. The outer rail assembly may include a pair of spaced apart outer rails each fixedly coupled to an associated sleeve or sliding mechanism. Each sleeve is in turn slidably coupled to an inner rail of the inner rail assembly. The outer rails may be positioned and oriented at an acute angle relative to the inner rails so as to provide an increased base distance between the two outer rails. Support structures are also disclosed which are coupled at multiple locations along a rail member and at least one location of a rung. Additionally, ladder hinges are disclosed including hinge components configured to effectively transmit loads from associated rails. In one embodiment the hinge may include a pinch prevention mechanism.
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