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US 4,189,030 AGranted
Web ladder
OwnerFrank B. Leslie, Alexander S. Kissinventors
Life of this patent
Estimating the term…
Abstract
This invention provides a collapsible web ladder in which a number of flat step members are connected to two flexible webs by virtue of T-shaped recesses in the ends of the step members. The flexible webs lodge in the recess portions corresponding to the cross-bars of the T's. Each web has affixed to it a plurality of spaced-apart block members which are adapted to lodge against and underneath the cross-bars of the T-shaped recesses, whereby weight placed on a step member can be transferred to the web.
Claims8
A collapsible web ladder comprising:
- a plurality of flat, elongated step members, each member having at either end a T-shaped recess, the stems of the T-shaped recesses for each member extending away from each other,
- two flexible webs adapted to be inserted into the recesses at opposite ends of the step members to lie along the cross-bars of the "T"'s, the recesses at the "T" cross-bars being sized to slidably enclose the webs, each web having affixed to it at a plurality of longitudinally spaced locations block members having a width greater than the width of the recesses at the "T" cross-bars, whereby a block member can lodge against a step member adjacent the recess, and allow weight placed upon the step member to be transferred to the web,
- and means at the top of the webs for attachment to a securement member.
Dependencies are inferred from the claim text.