Arrow Having Multiple Exterior Diameters and Multiple Interior Diameters

• US 20150133245A1
• Filed: 09/15/2014
• Published: 05/14/2015
• Est. Priority Date: 11/10/2010
• Status: Active Grant

• Current Assignee: Aldila Golf Corporation (Mitsubishi Chemical Group Corp.)
• Original Assignee: Aldila Golf Corporation (Mitsubishi Chemical Group Corp.)
• Inventors: Boretto, Tod, Connolly, Martin
• Granted Patent: US 9,297,620 B2
• Time in Patent Office: Days
• US Class Current: 473/578
• CPC Class Codes: F42B 12/362 Arrows or darts F42B12/38 takes precedence, having means for implantation, e.g. hypodermic projectiles F42B12/54; arrows or darts in general F42B6/00
• CPC Class Codes: F42B 33/001 Devices or processes for assembling ammunition, cartridges or cartridge elements from parts
• CPC Class Codes: F42B 6/04 Archery arrows F42B6/08, F41B5/06, F42B12/362 take precedence

Abstract

A cylindrical carbon fiber arrow shaft formed with an exterior surface having single or multiple outside diameters and formed with an axial bore having multiple interior diameters. In a preferred embodiment, the exterior surface of the arrow shaft has an increased external diameter at the nock end and tapers to a smaller external diameter at the tip end. The axial bore has an internal diameter at the nock end corresponding to standard arrows having external diameters of 0.295 inches and tapers to a smaller internal diameter at the tip end. Modifying the length, diameter, and wall thickness of the arrow shaft varies the stiffness of the arrow shaft along the length and shifts the center of gravity along the length of the arrow shaft and as well. Utilizing standard internal diameters, nock and tips may be attached without spacers or inserts, thereby decreasing weight of the arrow significantly.

Claims

1. An arrow comprising:

a cylindrical arrow shaft having an external surface and formed with a nonuniform axial bore;

a tip attachable to said tip end of said arrow shaft;

a fletching attachable to said exterior surface of said arrow shaft adjacent said nock end; and

a nock attachable to said nock end of said arrow shaft.

2. The arrow of claim 1, wherein said non-uniform axial bore comprises:

a forward bore having a forward bore diameter; and

a tail bore having a tail bore diameter.

3. The arrow of claim 2, wherein said forward bore diameter is smaller than said tail bore diameter.

4. The arrow of claim 2, wherein said non-uniform axial bore further comprises a tip bore having a tip bore diameter.

5. The arrow of claim 4, wherein said tip bore diameter is equal to said tail bore diameter.

6. The arrow of claim 1, wherein said non-uniform axial bore comprises:

a tail bore having a first diameter and a second diameter; and

a forward bore having a first diameter and a second diameter.

7. The arrow of claim 6, wherein said first diameter of said tail bore is equal to said first diameter of said forward bore and said second diameter of said tail bore is equal to said second diameter of said forward bore, said tail bore tapering from said first diameter to said second diameter and said forward bore tapering from said first diameter to said second diameter.

8. The arrow of claim 7, wherein said non-uniform axial bore further comprises a nock cylindrical bore adjacent said tail bore and a tip cylindrical bore adjacent said forward bore.

9. The arrow of claim 8, wherein said non-uniform axial bore comprises:

a tail bore having a tail bore diameter;

a forward bore having a forward bore diameter, said forward bore diameter smaller than said tail bore diameter; and

a taper bore tapering form said tail bore to said forward bore.

10. An arrow having multiple exterior diameters and multiple interior diameters comprising:

a cylindrical arrow shaft having a non-uniform exterior surface and formed with a non-uniform axial bore;

a tip attachable to said tip end of said arrow shaft;

a fletching attachable to said exterior surface of said arrow shaft adjacent said nock end; and

a nock attachable to said nock end of said arrow shaft.

11. The arrow of claim 10, wherein said non-uniform exterior surface comprises:

a first exterior diameter extending a predetermined distance of said arrow shaft;

a second exterior diameter extending a predetermined distance of said arrow shaft; and

a taper connecting said first exterior diameter with said second exterior diameter, said taper extending a predetermined distance of said arrow shaft.

12. The arrow of claim 11, wherein said non-uniform axial bore comprises:

a forward bore having a forward bore diameter; and

a tail bore having a tail bore diameter.

13. The arrow of claim 12, wherein said forward bore diameter is smaller than said tail bore diameter.

14. The arrow of claim 11, wherein said non-uniform axial bore further comprises a tip bore having a tip bore diameter.

15. The arrow of claim 14, wherein said tip bore diameter is equal to said tail bore diameter.

16. The arrow of claim 11 wherein said non-uniform axial bore comprises:

a tail bore having a first diameter and a second diameter; and

a forward bore having a first diameter and a second diameter.

17. The arrow of claim 16, wherein said first diameter of said tail bore is equal to said first diameter of said forward bore and said second diameter of said tail bore is equal to said second diameter of said forward bore, said tail bore tapering from said first diameter to said second diameter and said forward bore tapering from said first diameter to said second diameter.

18. The arrow of claim 17, wherein said non-uniform axial bore further comprises a nock cylindrical bore adjacent said tail bore and a tip cylindrical bore adjacent said forward bore.

19. The arrow of claim 18, wherein said non-uniform axial bore comprises:

a tail bore having a tail bore diameter;

a forward bore having a forward bore diameter, said forward bore diameter smaller than said tail bore diameter; and

a taper bore tapering form said tail bore to said forward bore.

20. A method of manufacturing an arrow having multiple exterior and interior diameters comprising the steps of:

providing a mandrel having multiple exterior diameters;

wrapping a carbon fiber about said mandrel to form a uni-body arrow shaft, having multiple exterior and interior diameters, having a tip end and a fletching end;

impregnating said carbon fiber with an epoxy resin;

heating said carbon fiber, epoxy resin and mandrel;

cooling said carbon fiber, epoxy resin and mandrel; and

removing said shaft from said mandrel.