Spin element for arrow or bolt

• US 20080113834A1
• Filed: 11/10/2006
• Published: 05/15/2008
• Est. Priority Date: 11/10/2006
• Status: Active Grant

• Current Assignee: New Archery Products, LLC (BRS Outdoor Sports Holdings LLC)
• Original Assignee: New Archery Products Corporation (BRS Outdoor Sports Holdings LLC)
• Inventors: Mizek, Robert S., Harwath, Frank A.
• Granted Patent: US 7,955,201 B2
• Time in Patent Office: Days
• US Class Current: 473/586
• CPC Class Codes: F42B 10/26 using spin F42B10/04, F42B10/12, F42B10/14, F42B10/24, F42B14/02 take precedence
• CPC Class Codes: F42B 6/04 Archery arrows F42B6/08, F41B5/06, F42B12/362 take precedence

Abstract

An arrow element, such as an insert and/or sleeve, mounted with respect to a shaft with at least one airflow resistor projecting outward from the insert to impart rotational spin about a longitudinal axis or spin axis arrow during flight, to increase aerodynamic performance and stability of the arrow shaft, and to improve arrow flight accuracy.

Claims

1. An apparatus for rotating a shaft of at least one of an arrow shaft and a bolt shaft during a flight, the apparatus comprising:

an element comprising at least one of an insert, a sleeve, a ferrule, and a collar;

the element mountable in a fixed position with respect to the shaft; and

at least one airflow resistor projecting outward from the element.

2. An apparatus according to claim 1, wherein the insert is detachably connected with respect to the shaft.

3. An apparatus according to claim 1, wherein the insert is mounted at a forward end of the shaft.

4. An apparatus according to claim 1, wherein the insert is mounted at a rearward end of the shaft.

5. An apparatus according to claim 1, wherein the insert is mounted between a forward end of the shaft and a reward end of the shaft.

6. An apparatus according to claim 1, wherein the insert has a female receiver that accepts an arrowhead.

7. An apparatus according to claim 6, wherein the female receiver forms a closed bore.

8. An apparatus according to claim 6, wherein the female receiver forms a through bore.

9. An apparatus according to claim 8, wherein the insert has an inner diameter at the through bore that is less than an outer diameter of a shaft portion of the insert.

10. An apparatus according to claim 1, wherein the insert has at least one shaft portion extending from the insert in at least one of a forward direction and a rearward direction.

11. An apparatus according to claim 10, wherein the at least one shaft portion has a shaft portion outer diameter less than a body outer diameter of a body of the insert.

12. An apparatus according to claim 1, wherein the insert has a body and the at least one airflow resistor is connected to the body.

13. An apparatus according to claim 12, wherein a body outer diameter of the body is approximately equal to a shaft outer diameter of the shaft.

14. An apparatus according to claim 1, wherein the insert has a shaft portion that is engageable with a shaft receiver of the shaft and a female receiver that accepts one of an arrowhead and a nock.

15. An apparatus according to claim 1, wherein the at least one airflow resistor is an airfoil.

16. An apparatus according to claim 15, wherein the airfoil is positioned at an angle with respect to a direction approximately parallel to a longitudinal axis of the shaft.

17. An apparatus according to claim 1, wherein a plurality of the airflow resistors are equally spaced about a periphery of the insert.

18. The apparatus of claim 1, wherein the element is fabricated by at least one of forging, casting, molding, stamping, machining, thixotropic metal molding, metal injection molding, powder injection molding, plastic injection molding, reaction injection molding and insert molding.

19. An apparatus for rotating a shaft of at least one of an arrow shaft and a bolt shaft during a flight, the apparatus comprising:

at least one of an insert and a sleeve mountable in a fixed position with respect to the shaft;

at least one airflow resistor projecting outward from and connected to a body of the at least one of insert and the sleeve; and

a body outer diameter of the body approximately equal to a shaft outer diameter of the shaft.

20. The apparatus of claim 19, wherein the at least one airflow resistor forms a helical flight.

21. The apparatus of claim 19, wherein an outer surface of the insert is irregular.