Rotary arrowhead assembly

• US 8,043,176 B2
• Filed: 07/08/2008
• Issued: 10/25/2011
• Est. Priority Date: 07/08/2008
• Status: Expired due to Fees

• Current Assignee: Dora Byrne, Timothy Byrne
• Original Assignee: Dom Byrne, Timothy Byrne
• Inventors: Byrne, Timothy E.
• Primary Examiner(s): RICCI, JOHN A
• Application Number:
  US12/169,472
• Publication Number:
  US 20100009789A1
• Time in Patent Office: 1,204 Days
• Field of Search: 473/583, 473/584
• US Class Current: 473/578
• CPC Class Codes: F42B 6/08 Arrow heads; Harpoon heads

Abstract

An arrowhead assembly includes a blade tube that may rotate in flight at a rate during flight that is independent from the arrow shaft rotation. The assembly, upon and after impact with the target, continues rotational motion of the blade tube to penetrate a substantial distance into the target. Such characteristics are facilitated by the spiral-shaped, or twisting, nature of the blades as well as the rotational motion that is imparted by a spring arrangement of the assembly after compression and expansion of the spring arrangement upon impact.

Claims

1. A rotary arrowhead assembly for impacting on a target, the assembly comprising

a first blade comprising a tip,

a cylindrical body,

a tubular body,

a firing pin,

a blade tube comprising at least one blade extending away from said blade tube,

a torsion spring,

a push spring,

a plurality of roll pins, and

a coupling shaft,

wherein said first blade is removably attached to said cylindrical body and is secured to said cylindrical body by way of at least two roll pins,

wherein said cylindrical body is removably coupled to and received within said tubular body,

wherein said firing pin is removably secured within said cylindrical and tubular bodies and within said blade tube in the assembly before impact of the assembly upon a target,

wherein said cylindrical and said tubular bodies as removably coupled to one another are received in a hollow inner portion of said blade tube,

wherein said blade tube is retained on the assembly by said tubular body and by said coupling shaft,

wherein said torsion spring is compressed within said blade tube during before impact, and

wherein said blade tube is precluded from rotating about said cylindrical and tubular bodies before impact.

2. The rotary arrowhead assembly of claim 1, wherein after impact with a target said torsion spring decompresses and wherein said firing pin is dislodged from said tubular body and said blade tube,

whereby said decompression of said torsion spring and said dislodging of said firing pin allows said blade tube to rotate about said cylindrical and said tubular bodies after impact with a target.

3. The rotary arrowhead assembly of claim 1, wherein said assembly is comprised of titanium.

4. The rotary arrowhead assembly of claim 1, wherein said assembly is composed of aluminum.

5. The rotary arrowhead assembly of claim 1, wherein said assembly is capable of being attached to an arrow shaft.

6. The rotary arrowhead assembly of claim 1, wherein the first blade further comprises a plurality of beveled regions.

7. The rotary arrowhead assembly of claim 1, wherein said cylindrical body comprises

a first elongated hollow region;

a second elongated hollow region, and

a shaft,

and wherein said second hollow region further comprises opposing apertures.

8. The rotary arrowhead assembly of claim 1, wherein said tubular body comprises

a first end,

a second end,

a hollow interior portion,

an elongate slot disposed parallel to the axis of the tubular body, and

an access aperture;

wherein said first end of the tubular body further comprises a flange region that surrounds and extends away from the tubular body,

wherein said flange further comprises a pair of oppositely-disposed apertures situated on the circumference of the flange, which apertures are capable of accommodating a roll pin, and

wherein said flange further comprises at least two substantially planar regions that are adjacent to said apertures;

wherein said elongate slot further comprises a shelf disposed at the end of said slot that is proximate to said first end of said tubular body;

wherein said second end of said tubular body further comprises a female threaded portion; and

wherein said access aperture is disposed substantially opposite to said elongate slot.

9. The rotary arrowhead assembly of claim 1, wherein said blade tube comprises

a hollow inner portion,

a first torsion spring aperture, and

a plurality of firing pin apertures;

wherein said torsion spring aperture is capable of receiving an end of a torsion spring, and

wherein said plurality of firing pin apertures are capable of receiving at least a portion of a firing pin.

10. The rotary arrowhead assembly of claim 1, wherein said coupling shaft comprises

a first end,

a second end,

a stop flange,

a mandrel, and

a second torsion spring aperture;

wherein said first end further comprises a male threaded region,

wherein said second end further comprises a male threaded region,

wherein said thread stop extends outwardly from said shaft,

wherein said stop flange is substantially circular and is disposed at the midpoint of said shaft,

wherein said flange further comprises at least two oppositely disposed planar regions on the circumference of said flange;

wherein said mandrel is disposed between said thread stop and said flange; and

wherein said torsion spring aperture is disposed on the side of said flange that is proximate to said mandrel, said aperture capable of receiving an end of a torsion spring.

11. The rotary arrowhead assembly of claim 1, wherein said cylindrical body comprises a push spring disposed on said shaft of said cylindrical body.