US 2018/0023343 A1Published application

Staggered step trestle ladder

AssigneeThe Boeing Company

InventorsStacy Pritzkau, Kyle Arthur Hampton, Jason Stamey, Donald R. Crookston, Ryan T. Dalseg, Solomon D. Langheld

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Abstract

A ladder has first and second support members, joined at their upper ends by a hinge. The first and second support members have left rail and a right rail that support plural first and second steps. Steps secured to the rails a fixed distance apart and are staggered so that the steps of the first support member begin at a different elevation than the steps of the second support member. The steps are wider than the rails to provide a larger surface for a user to stand. The ladder has a deployed position in which first ends of the first and second supports remain close and the second ends are spread apart and held in a distance apart by a spreader bar. Upon drawing the second ends of the first and second supports together, the steps of the first and second support member do not touch or interfere and may interleave.

Claims24

Dependent claims

A ladder comprising:

a first support member having a first end and a second end, the first support member having a left rail and a right rail, wherein the left rail of the first support member and the right rail of the first support member are spaced a fixed distance apart, and wherein the first support member has a width;
a second support member having a first end and a second end, the second support member having a left rail and a right rail, wherein the left rail of the second support member and the right rail of the second support member are spaced a fixed distance apart, and wherein the second end of the second support member is attached to the second end of the first support member;
plural first steps disposed on the first support member located at predetermined distances from the first end;
and
plural second steps disposed on the second support member located staggered relative to the plural first steps on the first support member;
wherein each of the first steps are wider than the left and right rails of the first support member, and are mounted thereto so as to extend both inward and outward farther than the left and right rails of the first support member;
wherein each of the second steps are wider than the left and right rails of the second support member, and are mounted thereto so as to extend both inward and outward farther than the left and right rails of the second support member.

4 more elements

Dependencies are inferred from the claim text.