Ladder
AssigneeLadder Solutions USA Inc.
InventorsPaul Walkerden, Kenneth P. Walkerden
Life of this patent
Estimating the term…
Abstract
A ladder that includes two side rails, with each side rail having a cross-sectional shape defining an at least partially enclosed channel including an outer wall. The first and second lateral walls extend inward from the outer wall, and the first lateral wall includes a first offset defining a first inner wall. Each of the lateral walls extends further inward beyond the first inner wall to define first and second connecting walls of the side rail. The ladder also includes a plurality of rungs extending between the side rails, with each of the rungs being attached to the first and second connecting walls of the side rails.
Claims20
A ladder, comprising:
- two side rails, each side rail having a cross-sectional shape defining an at least partially enclosed channel including an outer wall, first and second lateral walls extending inward from the outer wall, the first lateral wall including a first offset defining a first inner wall, each of the lateral walls extending further inward beyond the first inner wall to define first and second connecting walls of the side rail;
- and
- a plurality of rungs extending between the side rails, each of the rungs being attached to the first and second connecting walls of the side rails, wherein:
- the two side rails and the associated rungs define a first ladder segment;
- and
- the ladder further includes a second ladder segment including a further two side rails and a further plurality of rungs extending between the further two side rails, the second ladder segment being slidingly connected to the first ladder segment;
- wherein the first inner wall and the first connecting wall of the first ladder segment define a recess and the second ladder segment is partially received in the recess of the first ladder segment.
A ladder comprising:
- two side rails, each side rail having a cross-sectional shape defining an at least partially boxed shape including an outer wall, first and second lateral walls extending inward from the outer wall, the first lateral wall including a first offset defining a first inner wall extending substantially parallel to the outer wall, each of the lateral walls extending further inward beyond the first inner wall to define first and second connecting walls of the side rail;
- a plurality of rungs extending between the side rails, each of the rungs being attached to the first and second connecting walls of the side rails, the rungs including:
- a step surface wall;
- a support member spaced apart from the step surface wall;
- at least two transverse walls connecting the step surface wall and the support member;
- and
- at least a first and a second connection flanges protruding below the support member;
- wherein the two side rails and the associated rungs define a first ladder segment;
- wherein the ladder further includes a second ladder segment including a further two side rails and a further plurality of rungs extending between the further two side rails, the second ladder segment being slidingly connected to the first ladder segment;
- and
- wherein the first inner wall and the first connecting wall of the first ladder segment define a recess and the second ladder segment is partially received in the recess of the first ladder segment.
Dependencies are inferred from the claim text.