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Ladder base stabiliser

Imported: 24 Feb '17 | Published: 06 Jan '04

Lance Rodney Sheffield

USPTO - Utility Patents

Abstract

A stabiliser for a ladder which enables the ladder to be safely used on sloping or uneven ground consists of spring loaded telescopic struts attached to the bottom of the ladder which are capable of compound rotary motion so that they can be opened to the required length and locked in position.

Description

An embodiment of the invention is described in the accompanying drawings in which

FIG. 1 shows the device in use

FIGS. 2

a and

2

b show enlarged views of part of FIG.

1.

FIGS. 3

a-

3

e show the attachment of the hub unit.

FIGS. 4

a and

4

b show the telescopic connector with FIG. 4

a being a cross-sectional view along the line A—A of FIG. 4

b.

FIGS. 5

a-

5

d show additional details of a preferred handle configuration for use with the present invention.

Claims

1. A ladder base stabilizer device comprising stabilizer members for attachment to or forming part of a ladder assembly having main uprights but no opposing back uprights, said ladder assembly comprising upper and lower ends, two primary stile members, and rung members extending between said stile members, said stabilizer device being adapted to stabilize said ladder assembly against moving or slipping on surfaces of varying slope or contour while the ladder assembly is in service without needing to adjust the lengths of said stabilizer members each time the ladder assembly is repositioned, said stabilizer device comprising:

2. The ladder base stabilizer device according to claim 1 further comprising a spring loaded pivotal arm connection which includes a spring loaded roller which acts on a sloping ramp to cause a strut member to move outwards from the stile of the ladder.

3. A ladder base stabilizer device comprising stabilizer members for attachment to or forming part of a ladder assembly having main uprights but no opposing back uprights, said ladder assembly comprising upper and lower ends, two primary stile members, and rung members extending between said stile members, said stabilizer device being adapted to stabilize said ladder assembly against moving or slipping on surfaces of varying slope or contour while the ladder assembly is in service without needing to adjust the lengths of said stabilizer members each time the ladder assembly is repositioned, said stabilizer device comprising:

4. A ladder base stabilizer device comprising stabilizer members for attachment to or forming part of a ladder assembly having main uprights but no opposing back uprights, said ladder assembly comprising upper and lower ends, two primary stile members, and rung members extending between said stile members, said stabilizer device being adapted to stabilze said ladder assembly against moving or slipping on surfaces of varying slope or contour while the ladder assembly is in service without needing to adjust the lengths of said stabilizer members each time the ladder assembly is repositioned, said stabilizer device comprising:

5. A ladder base stabilizer device comprising stabilizer members for attachment to or forming part of a ladder assembly having main uprights but no opposing back uprights, said ladder assembly comprising upper and lower ends, two primary stile members, and rung members extending between said stile members, said stabilizer device being adapted to stabilize said ladder assembly against moving or slipping on surfaces of varying slope or contour while the ladder assembly is in service without needing to adjust the lengths of said stabilizer members each time the ladder assembly is repositioned, said stabilizer device comprising:

6. A ladder base stabilizer device comprising stabilizer members for attachment to or forming part of a ladder assembly having main uprights but no opposing back uprights, said ladder assembly comprising upper and lower ends, two primary stile members, and rung members extending between said stile members, said stabilizer device being adapted to stabilize said ladder assembly against moving or slipping on surfaces of varying slope or contour while the ladder assembly is in service without needing to adjust the lengths of said stabilizer members each time the ladder assembly is repositioned, said stabilizer device comprising:

7. A ladder base stabilizer device comprising stabilizer members for attachment to or forming part of a ladder assembly having main uprights but no opposing back uprights, said ladder assembly comprising upper and lower ends, two primary stile members, and rung members extending between said stile members, said stabilizer device being adapted to stabilize said ladder assembly against moving or slipping on surfaces of varying slope or contour while the ladder assembly is in service without needing to adjust the lengths of said stabilizer members each time the ladder assembly is repositioned, said stabilizer device comprising:

8. A ladder base stabilizer device comprising stabilizer members for attachment to or forming part of a ladder assembly having main uprights but no opposing back uprights, said ladder assembly comprising upper and lower ends, two primary stile members, and rung members extending between said stile members, said stabilizer device being adapted to stabilize said ladder assembly against moving or slipping on surfaces of varying slope or contour while the ladder assembly is in service without needing to adjust the lengths of said stabilizer members each time the ladder assembly is repositioned, said stabilizer device comprising:

9. A ladder assembly having main uprights but no opposing back uprights, said ladder assembly comprising upper and lower ends; two primary stile members; rung members extending between said stile members, wherein at least one of said rung members is hollow; and a ladder base stabilizer device comprising stabilizer members to stabilize said ladder assembly against moving or slipping on surfaces of varying slope or contour while the ladder assembly is in service without needing to adjust the lengths of said stabilizer members each time the ladder assembly is repositioned, said stabilizer device comprising:

10. A ladder assembly having main uprights but no opposing back uprights, said ladder assembly comprising upper and lower ends; two primary stile members; rung members extending between said stile members, wherein at least one of said rung members is hollow; and a ladder base stabilizer device comprising stabilizer members to stabilize said ladder assembly against moving or slipping on surfaces of varying slope or contour while the ladder assembly is in service without needing to adjust the lengths of said stabilizer members each time the ladder assembly is repositioned, said stabilizer device comprising:

11. A ladder assembly having main uprights but no opposing back uprights, said ladder assembly comprising upper and lower ends; two primary stile members; rung members extending between said stile members, wherein at least one of said rung members is hollow; and a ladder base stabilizer device comprising stabilizer members to stabilize said ladder assembly against moving or slipping on surfaces of varying slope or contour while the ladder assembly is in service without needing to adjust the lengths of said stabilizer members each time the ladder assembly is repositioned, said stabilizer device comprising: