Extension ladder with local reinforcement
Number of patents in Portfolio can not be more than 2000
United States of America
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Nov 26, 2024
Grant Date -
Oct 29, 2020
app pub date -
Apr 29, 2019
filing date -
Apr 29, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
An extension ladder having a base section and a fly section. The fly section has a right local reinforcement disposed inside a right fly rail of the fly section at locations of highest bending moment of the right fly rail when a force is applied to the right fly rail. The right local reinforcement is shorter than a length of the right fly rail. Loads applied to the right fly rail are transmitted to the right local reinforcement so the right fly rail may be thinner than if there was no right local reinforcement present. A method for producing a ladder rail with a local reinforcement between a top rail flange and a bottom rail flange. A method for using an extension ladder.
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