Small diameter double cutter crossbow bolt

• US 9,011,280 B2
• Filed: 01/13/2014
• Issued: 04/21/2015
• Est. Priority Date: 01/11/2013
• Status: Active Grant

• Current Assignee: William Gartland
• Original Assignee: William Gartland
• Inventors: Gartland, William
• Primary Examiner(s): RICCI, JOHN A
• Application Number:
  US14/153,999
• Publication Number:
  US 20140221138A1
• Time in Patent Office: 463 Days
• Field of Search: 473/578, 473/583, 473/585, 473/586
• US Class Current: 473/578
• CPC Class Codes: F42B 6/02 Arrows; Crossbow bolts; Harpoons for hand-held spring or air guns
• CPC Class Codes: F42B 6/04 Archery arrows F42B6/08, F41B5/06, F42B12/362 take precedence
• CPC Class Codes: F42B 6/08 Arrow heads; Harpoon heads

Abstract

The small diameter double cutter crossbow bolt of the present invention incorporates a midsection spacer having a plurality of blades, positioned mid-shaft of a small diameter shaft having a nock and a tip. The nock and midsection spacer has an outer diameter equal to the outer diameter of a standard bolt to ensure the centerline axis of the bolt is the same as a traditional crossbow bolt, allowing the use of the small diameter double cutter crossbow bolt in standard crossbow stocks and rails. In a preferred embodiment, midsection blade is formed with a lumen and is slid over the small diameter shaft. In an alternative preferred embodiment, the midsection spacer is a solid unit, joining two halves of a small diameter shaft. Thus, the small diameter double cutter crossbow bolt of the present invention provides a crossbow bolt capable of greater speeds, range, accuracy, kinetic energy, and lethality.

Claims

1. A small diameter double cutter crossbow bolt comprising:

an elongated shaft formed with a lumen and having a central axis, a front end, a tail end, and an outer surface having a first diameter;

a spacer, formed as a collar having an outer diameter and a cylindrical axial bore with an inner diameter greater than said first diameter of said elongated shaft, and slidable along said outer surface of said elongated shaft, wherein said spacer further comprises a leading taper and a trailing taper; and

a plurality of blades extending axially from said spacer.

2. The small diameter double cutter crossbow bolt of claim 1, wherein said leading taper of said spacer is symmetrical to said trailing taper of said spacer.

3. The small diameter double cutter crossbow bolt of claim 1, wherein said plurality of blades is equally spaced apart and fixedly attached to said spacer.

4. The small diameter double cutter crossbow bolt of claim 1, wherein said plurality of blades is equally spaced apart and hingedly attached to said spacer.

5. The small diameter double cutter crossbow bolt of claim 1, wherein said plurality of blades is equally spaced apart and configured to be retractable.

6. The small diameter double cutter crossbow bolt of claim 1, further comprising an adhesive applied between said outer surface of said elongated shaft and said inner diameter of said spacer to secure said spacer at a desired location on said elongated shaft.

7. The small diameter double cutter crossbow bolt of claim 1 further comprising:

an insert, formed with an outer diameter and an axial bore having internal threads formed to accept a tip;

a pin that extends axially away from said bore and is sized to be closely received within said lumen of said elongated shaft, positioned at the front end of the elongated shaft;

a nock formed with an outer diameter and a pin sized to be closely received within said lumen of said elongated shaft, positioned at the tail end of said elongated shaft; and

a plurality of fletches attached to said outer surface of said elongated shaft adjacent to said tail end.

8. The small diameter double cutter crossbow bolt of claim 7, wherein said outer diameter of said nock and said outer diameter of said spacer is substantially equal.

9. The small diameter double cutter crossbow bolt of claim 7, wherein said outer diameter of said nock and said outer diameter of said spacer is substantially equal.

10. A small diameter double cutter crossbow bolt comprising:

a front shaft formed with a lumen and a length extending from a leading end to a trailing end;

a tail shaft formed with a lumen and a length extending from a leading end to a trailing end;

a spacer having a body with a leading end and a trailing end, a leading axial pin extending from said leading end of said body and a trading axial pin extending from said trailing end of said body, wherein said spacer is positioned between the front shaft and tail shaft; and

a plurality of blades extending axially from said spacer.

11. The small diameter double cutter crossbow bolt of claim 10, wherein said body of said spacer further comprises a leading taper on said leading end of said body and a trailing taper on said trailing end of said body.

12. The small diameter double cutter crossbow bolt of claim 11, wherein said leading taper of said spacer is symmetrical to said trailing taper of said spacer.

13. The small diameter double cutter crossbow bolt of claim 12, wherein said body of said spacer further comprises a leading annular ring on the leading end of said body and a trailing annular ring on said trailing end of said body, said leading annular ring creating a leading flange, and said trailing annular ring creating a trailing flange.

14. The small diameter double cutter crossbow bolt of claim 10, wherein said plurality of blades is equally spaced apart and fixedly attached to said spacer.

15. The small diameter double cutter crossbow bolt of claim 10, wherein said plurality of blades is equally spaced apart and hingedly attached to said spacer.

16. The small diameter double cutter crossbow bolt of claim 10, wherein said plurality of blades comprises equally spaced spring-loaded blades that are extendable from a closed position to an open position.

17. The small diameter double cutter crossbow bolt of claim 10, wherein said plurality of blades comprises detachable blades, spaced equally apart, which detach from said spacer upon penetration of a target and remain connected by a short cable.

18. The small diameter double cutter crossbow bolt of claim 10, further comprising an adhesive applied between said leading axial pin and said lumen of said front shaft and between said trailing axial pin and said lumen of said tail shaft to secure said spacer to said front shaft and said tail shaft.

19. The small diameter double cutter crossbow bolt of claim 10 further comprising:

an insert, formed with an outer diameter and an axial bore having internal threads formed to accept a tip, a pin that extends axially away from said bore and is sized to be closely received within said lumen of said elongated shaft, positioned at the front end of the elongated shaft;

a nock formed with an outer diameter and a pin sized to be closely received within said lumen of said elongated shaft, positioned at the tail end of said elongated shaft; and

a plurality of fletches attached to said outer surface of said elongated shaft adjacent to said tail end.