Step ladders, components for step ladders and related methods

Patent metadata

Field	Value
Publication number	US-10597941-B2
Application number	US-201414496987-A
Country	US
Kind code	B2
Filing date	Sep 25, 2014
Priority date	Sep 27, 2013
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

A step ladder includes a first assembly having a first pair of spaced apart rails, a second assembly having at least one rail, and a top cap coupled with the first assembly and the second assembly. At least one of the first and second assemblies may be pivotally coupled with the top cap. The first assembly includes a plurality of rungs coupled with the rails and may exhibit a vertical spacing of a first distance between adjacent rungs, a vertical spacing equal to the first distance between the lowermost rung and a supporting surface (e.g., the ground), and a vertical spacing between the uppermost rung and the top cap that is greater than the first distance. In one particular embodiment, the vertical spacing between the uppermost rung and the top cap is twice the distance of the first distance.

First claim

What is claimed is:

1. A step ladder comprising:
a first assembly comprising:
a first pair of spaced apart rails;
a plurality of rungs extending between and coupled to the first pair of spaced apart rails;

a second assembly comprising a second pair of spaced apart rails;
a top cap having a front wall and a pair of side walls, the front wall extending between and integrally formed with the pair of side walls, wherein an upper portion of a laterally outer surface of each side wall of the pair of side walls includes a first portion adjacent the front wall and a second, laterally flared portion such that a first width is exhibited between laterally outermost surfaces of the first portions and a second width is exhibited between laterally outermost surfaces of the second, laterally flared portions, the second width being greater than the first width;
wherein each rail of the first pair of rails is fixedly coupled with a first portion of an associated one of the pair of side walls;
wherein each rail of the second pair of rails is pivotally coupled with an associated one of the flared portions of the side walls; and
wherein the plurality of rungs exhibit a spacing with a first distance between adjacent rungs of the plurality of rungs and a second distance between the top cap and a rung of the plurality of rungs closest to the top cap, wherein the second distance is at least approximately twice the first distance.

2. The step ladder of claim 1 , wherein, when the ladder is in a deployed condition and placed on a support surface, an upper surface of a lowermost rung of the plurality of rungs exhibits a spacing from the support surface that is equal to the first distance.

3. The step ladder of claim 1 , wherein the first assembly further comprises a pair of feet, including one foot coupled to each of the first pair of spaced apart rails, wherein an upper surface of a rung of the plurality of rungs that is closest to the pair of feet exhibits a spacing from the pair of feet that is equal to the first distance.

4. The step ladder of claim 1 , further comprising a plurality of cross-braces, each cross-brace of the plurality of cross-braces having a first end positioned adjacent to and coupled with a first rail of the second pair of rails and a second end positioned adjacent to and coupled with a second rail of the second pair of rails.

5. The step ladder of claim 1 , further comprising at least two hinged spreader mechanisms, each spreader mechanism extending between the first assembly and the second assembly and having a first end coupled with one of the first pair of rails and a second end coupled with one of the second pair of rails.

6. The step ladder of claim 1 , wherein the front wall is positioned closest to the first pair of rails and includes an exterior, undulating portion defining two, spaced apart concave surfaces between the pair of side walls.

7. The step ladder of claim 1 , wherein a total number of rungs of the plurality of rungs is equal to a height of the ladder in feet minus the integer 2.

8. The step ladder of claim 1 , wherein the first distance is approximately 1 foot and the second distance is approximately 2 feet.

9. The step ladder of claim 1 , wherein an overall thickness (T TOT ) of the ladder when in a folded state is less than a sum of a thickness of the first pair of rails (T FR ) and a thickness of the second pair of rails (T RR ).

10. The step ladder of claim 9 , wherein T TOT is approximately equal to T FR .

11. The step ladder of claim 9 , wherein T TOT is approximately 1.5×T FR or less.

12. The step ladder of claim 1 , wherein the rung of the plurality of rungs that is closest to the top cap exhibits a depth that is greater than a depth of the pair of rails of the first assembly.

Assignees

• Wing Entpr Inc

Inventors

• Moss N Ryan
• Cook Benjamin L
• Peterson Sean R

Classifications

• E06C1/18 Primary

  with supporting struts formed as ladders {(E06C1/32 takes precedence)} · CPC title

• E06C1/16

  with {hinged} struts which rest on the ground (with struts rigid with the ladder E06C1/24; having platforms E06C1/39) · CPC title

• E06C7/46

  Non-skid equipment · CPC title

• E06C7/14

  Holders for pails or other equipment on or for ladders · CPC title