Detachable rotary broadhead apparatus having drill bit-like characteristics

• US 5,257,809 A
• Filed: 04/19/1993
• Issued: 11/02/1993
• Est. Priority Date: 11/02/1992
• Status: Expired due to Fees

• Current Assignee: Robert S. Carrizosa
• Original Assignee: Robert S. Carrizosa
• Inventors: Carrizosa, Robert S.
• Primary Examiner(s): SHAPIRO, PAUL
• Application Number:
  US08/049,114
• Time in Patent Office: 197 Days
• Field of Search: 273/416, 273/419-423
• US Class Current: 473/584
• CPC Class Codes: F42B 6/08 Arrow heads; Harpoon heads

Abstract

A broadhead arrow having mechanical structure that improves the rotational freedom of the broadhead portion to prolong rotation during penetration of a target. The mechanical structure further includes an arrow tip, formed as a fluted arrow tip structure, that initiates target penetration by producing drill bit-like action upon rotationally contacting a target. The fluted arrow tip is followed by the bladed, rotatably free, broadhead portion having a plurality of elongated blades that are formed having a sharp, edged, concave upper body structure, contoured for cutting and discarding, in a plow-like manner, any target material, such as flesh and bone material encountered during rotary penetration of a target.

Claims

1. A broadhead arrow apparatus, said apparatus comprising:

an arrow tip member having an end with a point, a base and a plurality of fluted, drill bit-like, cutting members extending from said point to said base and spiraling about said tip in a first direction; and

a bladed broadhead member rotatably secured to said arrow tip portion, said bladed broadhead member comprising an elongate core member having a leading end adjacent said tip member, a trailing end and a plurality of blades, each blade having a flat lower body portion mounted to said core in a spiral about said core in the same direction as the cutting members of said tip, and an upper body portion extending away from said core and curved about said core in a direction opposite to the direction of spiral.

2. A broadhead arrow apparatus, as described in claim 1, further comprising:

a slip washer disposed behind the trailing end of the core.

3. A broadhead arrow apparatus, as described in claim 2, wherein

said core portion is cylindrical and has a hollow inner core portion and an outer core portion,

said inner core portion being formed from a hard metal material, and said outer core portion being formed from a durable plastic material, each blade being disposed along and embedded in said outer core portion.

4. A broadhead arrow apparatus, as described in claim 3, wherein:

said inner core portion further comprises opposing lagging and leading flanged bearing surface ends,

said slip washer being formed of a softer material than said inner core portion; and

said slip washer being disposed behind said lagging flanged bearing surface end.

5. A broadhead arrow apparatus, as described in claim 1, further comprising:

a shaft portion on said arrow tip member; and

an interface base member having a leading end attached to said tip member and a lagging end adapted to be attached to an insert mounting provided on a leading end of a fletching-containing arrow shaft portion, said bladed broadhead member being rotationally mounted on said shaft portion.

6. A broadhead arrow apparatus, as described in claim 5, further comprising:

a slip washer disposed between said interface base member and said broadhead member; and

wherein the base of said tip member comprises a tapered undercut;

said bladed broadhead member being disposed in rotational securement on said shaft portion and between said tapered undercut and said slip washer.

7. A broadhead arrow apparatus, as described in claim 5, wherein:

said leading end of said interface base member comprises

an interior threaded bore portion,

a narrower, non-threaded bore portion extending rearwardly from said interior threaded bore portion,

a wider, non-threaded bore portion extending forwardly from said interior threaded bore portion, said interior threaded bore portion, said narrower, non-threaded bore portion and said wider, non-threaded bore portion providing a firm engagement structure for said shaft portion.

8. A broadhead arrow apparatus, as described in claim 1, wherein:

said core comprises a cylindrical portion formed having a hollow inner core portion and an outer core portion, said inner core portion further comprises opposing lagging and leading flanged bearing surface ends,

said leading flanged bearing surface end being forwardly tapered, and said fluted cutting members having an inwardly tapered lagging end for forming a smooth surfaced slip junction with said leading flanged bearing surface end to facilitate rotation of said bladed broadhead member and an unobstructed feed of target material from fluted cutting members to said plurality of elongated blades.

9. A broadhead arrow apparatus, said apparatus comprising:

an arrow tip member having an end with a point, a base, a plurality of fluted, drill bit-like, cutting members extending from said point to said base and spiraling about said tip in a first direction, and an elongated shaft portion extending rearwardly from said base;

an interface base member having a leading end and a lagging end, said shaft portion being attached to said leading end and said lagging end adapted to be attached to an insert mounting provided on a leading end of a flectching-containing arrow shaft portion; and

a bladed broadhead member rotatably secured on said shaft portion, said bladed broadhead member comprising an elongate core member having a leading end abutting the base of the tip member and a plurality of elongated blades, each blade having a flat lower body portion mounted to said core in a spiral about said core in the same direction as the cutting members of said tip, and an upper body portion extending away from said core and curved about said core in a direction opposite to the direction of spiral.

10. A broadhead arrow apparatus, as described in claim 9, further comprising:

the base of said tip member having a tapered undercut;

a slip washer disposed between said interface base member and said broadhead member; and

wherein

said bladed broadhead member being disposed in rotational securement on said shaft portion between said tapered undercut and said slip washer.

11. A broadhead arrow apparatus, as described in claim 10, wherein:

said care portion is cylindrical and has a hollow inner core portion and an outer core portions, said inner core portion further comprises opposing lagging and leading flanged bearing surface ends, said inner core portion being formed from a hard metal material, and said outer core portion being formed from a durable plastic material, each elongated blade being disposed along and embedded in said outer core portion;

said slip washer being formed of a softer material than said inner core portion; and

said slip washer being disposed between said lagging flanged bearing surface end and said leading end of said interface base member to effect said rotatable securement of said broadhead member.

12. A broadhead arrow apparatus, said apparatus comprising:

an arrow tip member having an end with a point and a base, a plurality of fluted, drill bit-like, cutting members extending from said point to said base and spiraling about said tip in a first direction, and an elongated shaft portion extending rearwardly from said base;

an interface base member having a leading end and a lagging end, said shaft portion being attached to said leading end and said lagging end adapted to be attached to an insert mounting provided on a leading end of a fletching-containing arrow shaft portion;

a bladed broadhead member rotatably secured on said shaft portion, said bladed broadhead member comprising an elongate core member having a leading end abutting the base of the tip member and a plurality of elongated blades, each blade having a flat lower body portion mounted to said core in a spiral about said core in the same direction as the cutting members of said tip, and an upper body portion extending away from said core and curved about said core in a direction opposite to the direction of spiral; and

a slip washer disposed between said interface base member and said broadhead member.

13. A broadhead arrow apparatus, as described in claim 12, wherein:

said care portion is a cylindrical and has a hollow inner core portion and an outer core portions, said inner core portion further comprises opposing lagging and leading flanged bearing surface ends, each elongated blade being disposed along and embedded in said outer core portion; and

said slip washer being disposed between said lagging flanged bearing surface end and said leading end of said interface base member to effect said rotatable securement of said broadhead member.

14. A broadhead arrow apparatus, as described in claim 13, wherein:

said leading flanged bearing surface end being forwardly tapered, and said fluted cutting members having an inwardly tapered lagging end defining said base and forming a smooth surfaced slip junction with said leading flanged bearing surface end to facilitate rotation of said bladed broadhead member and an unobstructed feed of target material from fluted cutting members to said plurality of elongated blades.

15. A broadhead arrow apparatus, as described in claim 12, wherein:

said arrow tip member further comprises a transverse through-hole for inserting a tool for tightening said arrow tip member to said interface base member; and

said interface base member comprises a knurled outer surface for providing a gripping means for tightening said base member to said insert mounting.