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US 11,085,237 B2Granted
Mass tuned ladder rung and ladder formed therewith
AssigneeCaterpillar Inc.
InventorThomas A. Meyen
Life of this patent
Estimating the term…
Abstract
A rung which can be installed in a ladder is disclosed which comprises a first plate having first and second ends, each of the first and second ends having a relief tab and an opening, and a second plate, the second plate being identical to the first plate, the first and second plates being nestable such that the relief tabs of the first plate insert through the openings of the second plate to form the rungs.
Claims19
A rung which can be installed in a ladder, comprising:
- a first plate having first and second ends, each of the first and second end having a relief tab and an opening, and a second plate, the second plate being identical to the first plate, the first and second plates being nestable such that the relief tab of the first end of the first plate is inserted through the opening of the first end of the second plate and the relief tab of the second end of the second plate is inserted through the opening of the second end of the first plate to form the rung.
A ladder for use on a work machine, the ladder comprising;
- first and second rails adapted to movably attach to the work machine;
- and
- a plurality of rungs extending between the first and second rails, each rung including first and second plates, each plate including first and second ends, each end having a relief tab and an opening, wherein, for each of the plurality of rungs, the first and second plates being nestable such that the relief tab of the first end of the first plate is inserted through the opening of the first end of the second plate and the relief tab of the second end of the second plate is inserted through the opening of the second end of the first plate to form the rung.
A method of manufacturing a break away ladder for a work machine, the method comprising:
- providing a first plate having first and second ends and first and second sides;
- providing a second plate having first and second ends and first and second sides;
- machining a c-shaped cut in each of the first and second ends;
- bending each of the first and second ends such that each of the first and second ends includes a relief tab and an opening;
- and
- nesting the first plate into the second plate such that the relief tab of the first end of the first plate is inserted through the opening of the first end of the second plate and the relief tab of the second end of the second plate is inserted through the opening of the second end of the first plate to form a rung.
3 more elements
Dependencies are inferred from the claim text.