ARROW WITH NOCK AND HEAD ALIGNMENT

• US 20170097215A1
• Filed: 10/03/2016
• Published: 04/06/2017
• Est. Priority Date: 10/03/2015
• Status: Active Grant

• Current Assignee: Brown Innovations Incorporated
• Original Assignee: Brown Innovations Incorporated
• Inventors: Brown, Kevin E.
• Granted Patent: US 9,829,292 B2
• Time in Patent Office: Days
• CPC Class Codes: F42B 6/04 Archery arrows F42B6/08, F41B5/06, F42B12/362 take precedence
• CPC Class Codes: F42B 6/06 Tail ends, e.g. nocks, fletching
• CPC Class Codes: F42B 6/08 Arrow heads; Harpoon heads

Abstract

An arrow with a non-circular central bore may allow for differential flexural rigidity in the shaft. A non-circular central bore, such as in the form of a bore with a rounded polygon, or more specifically a reuleaux triangle, may also provide self-alighting features when paired with a nock or arrowhead with similar shaped elements. This may allow a user to properly nock an arrow without resorting to manual alignment of the nock and fletchings. The central bore may extend along an entirety of the shaft, or only along a portion of the shaft. The non-circular central bore may be incorporated in an arrow shaft with a round exterior cross section, or with an arrow with a non-circular exterior cross section, such as in the form of a rounded polygon, or more specifically a reuleaux triangle.

Claims

11. An arrow comprising:

a shaft adapted to engage an arrowhead at a first end of the shaft and a nock at the second end of the shaft, said shaft defined by a wall including an exterior surface and an interior surface, said interior surface defining an interior bore within the shaft;

wherein the interior bore includes a cross section in the shape of a rounded polygon.

1. An arrow comprising:

a shaft spanning a longitudinal length from a first end of the shaft to a second end of the shaft, said shaft including an interior bore spanning at least a portion of said longitudinal length;

wherein the interior bore includes a non-circular cross sectional shape.

2. The arrow of claim 1, wherein the non-circular cross sectional shape comprises a rounded polygon.

3. The arrow of claim 2, wherein the rounded polygon is a reuleaux triangle.

4. The arrow of claim 2, wherein the rounded polygon is a rounded pentagon.

5. The arrow of claim 1, wherein the non-circular cross sectional shape comprises a triangle.

6. The arrow of claim 1, wherein the non-circular cross sectional shape comprises a triangle with rounded corners.

7. The arrow of claim 1, wherein the interior bore extends from the first end of the shaft to the second end of the shaft.

8. The arrow of claim 1, wherein the interior bore extends along a portion of the shaft less than the longitudinal length of the shaft.

9. The arrow of claim 1, wherein the shaft further includes an exterior cross-sectional shape that is geometrically similar to the cross-sectional shape of the interior bore.

10. The arrow of claim 1, wherein the shaft further includes a circular exterior cross-sectional shape.

12. The arrow of claim 11, wherein the exterior surface defines a cross section in the shape of a circle.

13. The arrow of claim 12, wherein the cross section of the interior bore is a reuleaux triangle.

14. The arrow of claim 12, wherein the cross section of the interior bore is a triangle with rounded corners.

15. The arrow of claim 12, wherein the cross section of the interior bore is a rounded pentagon.

16. The arrow of claim 12, wherein the exterior surface includes at least one mark aligning with a vertex of the rounded polygon.

17. The arrow of claim 12, wherein the exterior surface includes at least one mark aligning with a midpoint of a side of the rounded polygon.

18. The arrow of claim 11, wherein the exterior surface defines a cross section in the shape of a rounded polygon.

13-1. The arrow of claim 12, wherein the cross section of the interior bore is a triangle.