Extensible ladder for boats
OwnerRobert Z. Sklarinventor
Life of this patent
Estimating the term…
Abstract
Contractible and extensible ladder of the lazy-tong type for attachment to the underside of a swim/dive platform of a boat or to a deck of a boat. The ladder and the swim/dive platform or deck include coacting means so constructed for positioning the ladder in the contracted position under the swim/dive platform or deck for stowage thereof.
Claims19
In a swim/dive platform having top and bottom surfaces and a ladder secured to a surface of said platform, the improvement wherein said ladder comprises at least one pair of opposed linkages, each of said pair of linkages including at least first and second elongated link elements, the first link element including first and second end portions and the second link element including third and fourth end portions, and a first pivotal means mounting said link elements for movement relative to each other, said first pivotal means disposed substantially midway of the length of the first element, at least a first support pivotally interconnecting said second end portions of each of the first of said pair of opposed linkages for maintaining said linkages in spaced apart relationship, translatable and slidable means secured to said first end portions of each of the first of said link elements, each of said second link element and the bottom of said platform including coacting means for pivotally securing said ladder to said platform, said platform and said ladder being so constructed for stowage of said ladder in the contracted position on the bottom surface of said platform.
A ladder comprising at least one pair of opposed linkages, each of said pair of linkages including at least first and second elongated link elements of different lengths, the first link element including first and second end portions and the second link element including third and fourth end portions, and a first pivotal means mounting said link elements for movement relative to each other, said first pivotal means disposed substantially midway of the length of the first element and offset from the midpoint of the length of the second element, at least a first support pivotally interconnecting said first end portions of each of the first of said pair of opposed linkages for maintaining said linkages in spaced apart relationship, free and unobstructed means secured to said first support means and to the first end portion of each of the first of said link elements, said free and unobstructed means being of a larger dimension than the width of said first link element and of said first support means, said second link element including a second means for pivotal attachment to a surface.
Dependencies are inferred from the claim text.