Archery Broadhead Having Blade Cut-Out and Method for Making Same

• US 20090124438A1
• Filed: 11/08/2007
• Published: 05/14/2009
• Est. Priority Date: 11/08/2007
• Status: Active Grant

• Current Assignee: Liberty Research Co., Inc.
• Original Assignee: Liberty Research Co., Inc.
• Inventors: Perkins,, Derrick S. JR.
• Granted Patent: US 7,951,023 B2
• Time in Patent Office: Days
• US Class Current: 473/584
• CPC Class Codes: F42B 6/08 Arrow heads; Harpoon heads
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A broadhead comprising a ferrule configured to be mounted on an arrow shaft, and at least two cutting blades, configured to be mounted on the ferrule, each having a penetration limiter formed therein. The at least two cutting blades each have a cutting edge and a cutting tip, and wherein the penetration limiter comprises a cut-out formed in the cutting edge to limit penetration of the broadhead upon impact.

Claims

1. A broadhead comprising:

a ferrule configured to be mounted on an arrow shaft; and

at least two cutting blades, configured to be mounted on the ferrule, each having a penetration limiter formed therein.

2. The broadhead of claim 1, wherein each of the at least two cutting blades has a cutting edge and a cutting tip, and wherein the penetration limiter comprises a cut-out formed in the cutting edge to limit penetration of the broadhead upon impact.

3. The broadhead of claim 2, wherein the cut-out creates a gap in a length of the cutting edge, wherein the gap comprises more than about 20% of the length of the cutting edge.

4. The broadhead of claim 2, wherein the cut-out comprises more than about 10% of a cross-sectional area of the cutting blade.

5. The broadhead of claim 2, wherein the cut-out comprises an inner, forward-facing portion that is dull.

6. The broadhead of claim 5, wherein the inner, forward-facing portion of the cut-out is curved.

7. The broadhead of claim 2, wherein the cutting blades are permanently mounted to the ferrule.

8. The broadhead of claim 2, wherein each of the at least two cutting blades has a substantially triangular shape with a first edge forming the cutting edge, a second edge forming a mounting edge and a third edge forming a trailing edge, wherein the mounting edge includes a notch separating a flush edge portion from a stepped edged portion, the notch being configured to mate with a locking portion of the ferrule to secure the cutting blade to the ferrule with the stepped edge portion inserted into a longitudinal slot in the ferrule and the flush edge portion abutting a flush edge portion of another of the at least two cutting blades mounted to the ferrule.

9. A broadhead comprising:

a ferrule configured to be mounted on an arrow shaft; and

at least two cutting blades mounted on the ferrule, wherein each cutting blade has means for reducing its cross sectional area, which limits aerodynamic impact of the broadhead to enhance accuracy.

10. The broadhead of claim 9, wherein the cutting blades are permanently mounted to the ferrule.

11. A method for forming broadhead, comprising:

forming a ferrule configured to be mounted on an arrow shaft;

forming at least two cutting blades, configured to be mounted on the ferrule; and

forming a penetration limiter in each of the at least two cutting blades.

12. The method of claim 11, further comprising:

forming each cutting blade with a cutting edge and a cutting tip; and

forming the penetration limiter as a cut-out located in the cutting edge to limit penetration of the broadhead upon impact.

13. The method of claim 12, wherein forming the cut-out creates a gap in a length of the cutting edge, and wherein the gap comprises more than about 20% of the length of the cutting edge.

14. The method of claim 12, wherein forming the cut-out comprises removing more than about 10% of a cross-sectional area of the cutting blade.

15. The method of claim 12, further comprising forming the cut-out with an inner, forward-facing portion that is dull.

16. The broadhead of claim 15, further comprising forming the inner, forward-facing portion as curved.

17. The method of claim 12, further comprising permanently mounting the at least two cutting blades to the ferrule.

18. The method of claim 12, further comprising coupling the at least two cutting blades to the ferrule in their center portions by notches formed therein that mate with a locking portion of the ferrule.

19. The method of claim 12, forming a plurality of slots in the ferrule, such that the at least two cutting blades fit into a respective one of the slots.

20. A broadhead blade configured to be mounted on an arrow ferrule and having a penetration limiter formed therein.

21. The blade of claim 20, wherein blades has a cutting edge and a cutting tip, and wherein the penetration limiter comprises a cut-out formed in the cutting edge to limit penetration of the broadhead upon impact.

22. The blade of claim 20, wherein the cut-out creates a gap in a length of the cutting edge, wherein the gap comprises more than about 20% of the length of the cutting edge.

23. The blade of claim 20, wherein the cut-out comprises more than about 10% of a cross-sectional area of the blade.

24. The blade of claim 20, wherein the cut-out comprises an inner, forward-facing portion that is dull.

25. The blade of claim 24, wherein the inner, forward-facing portion of the cut-out is curved.