NZ761191B2 - A tool for barbed wire - Google Patents

Abstract

Barbed wire is used to discourage animals or people from passing through or over a fence line. The barbs can be formed by a variety of methods. Most commonly, a pair of barbs is formed by twisting a short length of wire about the main strand and leaving the two ends of the twist jutting in opposite directions. One problem with barbed wire is the difficulty in handling and tying off the ends, for example to a post or to another wire. Another problem with barbed wire arises with steel fence posts which have notches, rather than through holes, to retain wire. The use of hand tools such as side cutters can risk inadvertently nicking, kinking, or otherwise damaging the main strands which is relevant since the wire will be re-installed under high tension. A tool (1) for loosening or removing a set (2) of barbs (3) from barbed wire (4) is disclosed. The barbed wire has at least one strand (7) of wire and a plurality of spaced apart sets of barbs wound around the wire. The barbs extend in substantially opposite directions from a wire helix (6) wound around the wire. The tool has first and second portions (11) each engageable with the wire and having an opposed levering element (8) that is radially offset from the wire for applying leverage to the helix. Rotation of the portions in a first direction abuts each of the levering elements against a corresponding one of the pair of barbs to unwind or unfurl the helix.

Claims (20)

1. A tool for loosening or removing a set of barbs from barbed wire, said barbed wire comprising at least one strand of wire and a plurality of spaced apart sets 5 of barbs wound thereon, said strand(s) constituting a wire axis, each of said sets of barbs comprising at least one pair of barbs extending in substantially opposite directions from a wire helix wound around said strand(s); said tool having first and second portions each engageable with said barbed wire, each of said portions having an opposed levering element that is radially offset from 10 said axis for applying leverage to said helix, wherein with said first and second portions engaged with said barbed wire: said first and second portions are rotatable relative to each other about said wire axis, and, whereby said relative portion rotation in a first direction abuts each of said levering elements against a corresponding one of said pair of barbs to unwind or unfurl said helix.

2. The tool according to claim 1 wherein each of said levering elements comprises a prong that is radially offset from the axis and generally aligned with the axis. 20

3. The tool according to claim 1 or 2 wherein the first and second portions are each rotatable relative to the axis.

4. The tool according to any one of claims 1 to 3 and further having a hollow spacer disposed between the first and second portions, whereby said portions 25 are constrained by said spacer from moving toward each other or away from each other along the axis.

5. The tool according to claim 4 when dependent upon claim 3, wherein each of the first and second portions are rotatably engaged with the spacer.

6. The tool according to claim 4 or 5 wherein the spacer is engaged with at least one of the first and second portions by means of an annular tongue-and-groove or a snap fitting. 5514C-NZ

7. The tool according to claim 4 or 5 wherein the spacer is engaged with at least one of the first and second portions by means of a staple or pin.

8. The tool according to claim 4 or 5 wherein the spacer is engaged with at least 5 one of the first and second portions by means of at least one rivet or protrusion projecting from the spacer into a groove formed in said portion.

9. The tool according to claim 4 or 5 wherein the spacer is engaged with at least one of the first and second portions by means of an annular rim or projection 10 formed about an inside circumference of the spacer; said rim or projection engaging with a notch formed in said portion.

10. The tool according to any one of claims 4 to 9, wherein the first and second portions, and the spacer, when engaged with said barbed wire are substantially 15 co-axial about the axis.

11. The tool according to any one of claims 4 to 10, wherein the spacer is provided with a longitudinal spacer slot that can be aligned substantially parallel to the axis for receiving and releasing the tool from the barbed wire.

12. The tool according to any one of claims 4 to 11, wherein the first and second portions are provided with a corresponding radial first and second slot that can be aligned substantially perpendicular to the axis for receiving and releasing the barbed wire from the tool.

13. The tool according to any one of claims 4 to 12, wherein the spacer is provided with at least one aperture or window.

14. The tool according to any one of claims 4 to 13, wherein each of the first and 30 second portions are provided with a means of increasing friction with a user’s hands when said portions are rotated by said hands.

15. The tool according to any one of claims 4 to 14, wherein the spacer is formed by cold-pressing sheet metal. 5514C-NZ

16. The tool according to claim 12 wherein at least one of the first and second portions is provided with a ball detent that is engageable with the spacer.

17. The tool according to claim 12 wherein at least one of the radial first and 5 second slots is provided with a curved or hockey-stick shaped slot portion toward the wire axis.

18. The tool according to claim 14 wherein said means of increasing friction is selected from the class consisting of indents, protrusions, knurling, scorings 10 and scalloped protrusions.

19. The tool according to any one of claims 1-18 wherein said levering element comprises a prong which is threaded. 15

20. The tool according to any one of claims 1-19 wherein said levering element comprises a prong which is headed in the manner of a nail.