Ship ladder
AssigneeLaitram, L.L.C.
InventorJames M. Lapeyre
Life of this patent
Estimating the term…
Abstract
A ladder is provided which is especially adapted for shipboard use and which is safe and comfortable to use, of relatively light weight and occupying relatively small floor and overhead space. The ladder comprises a single stringer disposed between upper and lower deck or floor levels at a predetermined angle of inclination, and having an array of half treads on each side of the stringer, each array being vertically spaced from the other along the length of the stringer. The half treads are affixed to and extend from the respective sides of the stringer and each include an integral outwardly extending portion which terminates in a plane forward of a plane passing through the front edges of the treads. Handrails are disposed in this forward plane and are affixed to and supported by the outwardly extending tread portions.
Claims19
A ladder comprising:
- a single central tread support member adapted for mounting between an upper level and a lower level at a predetermined angle of inclination;
- a plurality of tread members disposed in alternating arrangement on respective sides of said support member, each of said tread members having a foot support portion outwardly extending from said support member, and each of said tread members having rail support means outwardly extending from the foot support portion and terminating substantially in a plane forward and parallel to a plane passing through the front edges of the foot support portions;
- and
- first and second handrails each attached to said rail support means.
A ladder comprising:
- a single stringer adapted for mounting at a predetermined angle of inclination between a lower mounting surface and an upper mounting surface;
- a first array of tread members each attached to one side of the stringer and spaced along the length thereof;
- a second array of tread members each attached to the opposite side of the stringer and spaced along the length thereof at a position spaced from adjacent tread members of the first array;
- each of said tread members including:
- a foot support portion adjacent the stringer and adapted to accommodate a foot of a user, and an outwardly extending portion which terminates in a plane which is forward of a plane passing through the front edges of the foot support portions;
- and
- first and second handrails each disposed on a respective side of the stringer and attached to the outward ends of the respective arrays of tread members and lying in the forward plane.
Dependencies are inferred from the claim text.