Elevated working platform and related methods

• US 10,145,176 B2
• Filed: 05/05/2017
• Issued: 12/04/2018
• Est. Priority Date: 01/23/2012
• Status: Active Grant

• Current Assignee: Little Giant Ladder Systems LLC (Wing Enterprises Incorporated)
• Original Assignee: Wing Enterprises Incorporated
• Inventors: Moss, N. Ryan, Penrod, Darius S., Russell, Brian, Peterson, Sean, Jonas, Gary
• Primary Examiner(s): Redman, Jerry E
• Application Number:
  US15/587,765
• Publication Number:
  US 20170241204A1
• Time in Patent Office: 578 Days
• CPC Class Codes: E06C 1/393 Ladders having platforms foldable with the ladder
• CPC Class Codes: E06C 1/397 characterised by having wheels, rollers, or runners
• CPC Class Codes: E06C 7/182 situated at the top of the ladder
• CPC Class Codes: E06C 7/185 Devices providing a back support to a person on the ladder, e.g. cages
• CPC Class Codes: E06C 7/423 Ladder stabilising struts

Abstract

Elevated work platforms, as well as associated methods, are provided. In one particular embodiment, an elevated platform apparatus is provided comprising a first rail assembly having a pair of rails coupled with a plurality of rungs, a second rail assembly hingedly coupled with the first rail assembly, a platform configured to rest upon a portion of the first rail assembly and the second rails assembly and a cage associated with the platform. The cage may include at least one bar and at least one gate, the at least one gate being configured to swing in a first direction upon a user stepping on to the platform from the first rail assembly, and then swing back to a closed position after the user is standing on the platform. The at least one gate is also limited from being displaced in a second direction, opposite the first direction, beyond the closed position.

Claims

1. An elevated platform apparatus comprising:

a first rail assembly having a pair of rails coupled with a plurality of rungs;

a second rail assembly, an upper end of the second rail assembly being hingedly coupled with the first rail assembly, the first rail assembly and the second rail assembly being selectively positionable relative to each other between a deployed state and a collapsed state;

a platform pivotally coupled with the first rail assembly and configured to extend between spaced apart portions of the first assembly and the second assembly when they are in the deployed state;

a cage including at least one frame member and a pair of gates collectively forming a barrier substantially surrounding an area above the platform when the first and second assemblies are in the deployed state and when the pair of gates are in a closed position, wherein the pair of gates extend towards each other when in the closed position, the pair of gates being selectively positionable from the closed position to an open position wherein the gates are rotated inwardly such that a portion of each gate of the pair extends into the area surrounding the platform, and wherein each of the pair of gates is limited from rotating outwardly away from the area above the platform beyond the closed position; and

wherein, when the first rail assembly and the second rail assembly are in the collapsed state, the platform is positioned adjacent the pair of gates.

2. The apparatus of claim 1, further comprising a locking member configured to releasably lock a the platform with the second rail assembly when the first and second assemblies are in the deployed state.

3. The apparatus of claim 1, wherein the pair of gates are biased towards the closed position.

4. The apparatus of claim 1, wherein the first rail assembly includes an outer rail assembly and an inner rail assembly slidingly coupled with the first rail assembly.

5. The apparatus of claim 4, further comprising at least one adjustment mechanism configured to selectively lock the inner rail assembly at a specified location relative to outer rail assembly.

6. The apparatus of claim 5, further comprising a pulley system associated with the first assembly and configured to assist adjustment of the inner rail assembly relative to the outer rail assembly.

7. The apparatus of claim 6, wherein the second rail assembly includes outer rail assembly and an inner rail assembly slidingly coupled with the first rail assembly.

8. The apparatus of claim 7, further comprising at least one other adjustment mechanism configured to selectively lock the inner rail assembly of the second assembly at a specified location relative to outer rail assembly of the second assembly.

9. The apparatus of claim 1, further comprising at least one pair of wheels coupled with the apparatus.

10. The apparatus of claim 9, wherein the at least one pair of wheels includes:

a first pair of wheels coupled with at least one of the first assembly and the second assembly at a fixed location;

a second pair of wheels coupled with the first assembly, the second pair of wheels including t least one retraction mechanism;

a third pair of wheels coupled with the second assembly, the third pair of wheels including at least one retraction mechanism.

11. The apparatus of claim 10, wherein the first pair of wheels are positioned such that they do not contact a supporting surface when the apparatus is positioned on the supporting surface in a deployed state and in an orientation of intended use.

12. The apparatus of claim 1, wherein the at least one frame member includes a first frame member and a second frame member.

13. The apparatus of claim 11, wherein the first frame member is positioned at a first height above the platform when the first and second assemblies are in the deployed position and wherein the second frame member is positioned at a second height above the platform when the first and second assemblies are in the deployed position, the second height being greater than the first height.

14. The apparatus of claim 12, further comprising a flexible material extending upward from the platform to at least the first frame member.

15. The apparatus of claim 1, further comprising at least one adjustable stabilizer coupled with at least one of the first rail assembly and the second rail assembly.