US20080234078A1

US20080234078A1 - Target marking arrow device

Info

Publication number: US20080234078A1
Application number: US11/690,309
Authority: US
Inventors: Christopher J. Eyerman
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-23
Filing date: 2007-03-23
Publication date: 2008-09-25

Abstract

A capsule that mounts on an arrow shaft to release a target marking material when the arrow impacts a target, the capsule having walls forming a chamber around the arrow shaft, and one or more breakaway grooves in the walls that break on impact of the arrow to allow the walls to separate and release the marking material from the chamber.

Description

The present invention relates generally to arrows used by archers, and more specifically, to a target marking arrow device that visually marks the point of impact on the surface of a target.

SUMMARY OF THE INVENTION

It can be difficult for an archer to accurately determine where the arrow hits the target whether it be a game animal, a three-dimensional target, or a field target. There can be many reasons for this difficulty, such as the distance and position of the target, the speed at which the arrow travels, the terrain, light conditions, and, in the case of wild game, movement of the animal after the shot has been made. The present invention overcomes these difficulties by providing a marking arrow device that shows the point of impact in a manner instantly visible to the archer.
In the case of bow hunters, instant visualization as to the point of impact of the arrow is critical information to the hunter. A shot to an animal's vitals (the lungs and/or heart) represents the desired arrow placement. If a hunter sees that the animal has been hit in the vitals, the hunter typically waits a short period of time (½-hour to 1-hour) allowing for the animal to expire before making the recovery. In the case of a marginal hit (a shot other than the vitals), the hunter will typically wait several hours or longer before attempting recovery. By doing so, the hunter greatly improves his or her chances of recovery. A complete miss can be seen by a residue the marking arrow device leaves on the ground or surrounding areas.
The invention features a capsule that mounts on the shaft of an arrow next to the arrowhead and contains a readily visible marking substance, such as a brightly colored, non-toxic food coloring, that can be dry or in liquid form. The capsule has walls, including an inner wall and an outer wall, forming a chamber for containing the target marking material. The inner wall of the capsule defines a passage for receiving an end portion of the arrowshaft, whereby the chamber surrounds the shaft. One or more of the capsule walls have fracture zones, such as breakaway grooves, that break on impact of the arrow to allow the walls to separate and release the target marking material from the capsule chamber.
In a disclosed embodiment, a circular breakaway groove is in an end of the capsule and discrete breakaway grooves are formed in the outer wall and extend endwise of the capsule, i.e. between the end of the capsule next to the arrowhead and the rear capsule wall. The rear wall of the capsule also may have a breakaway groove.
The capsule which is the feature of the invention can be used with all field-point and broadhead arrows that have a standard male/female screw attachment construction without modifying the arrows in any way. In the disclosed embodiment, the end of the arrow shaft received in the central passage of the capsule abuts the inner surface of the capsule front wall. The front of the capsule next to the arrowhead has wall portion extending radially inwardly of the inner wall. The wall portion has a central hole that accepts the male portion or neck of the arrowhead. During assembly, the capsule is slid onto the arrow shaft and is held in place by threadedly connecting the arrowhead neck to the end of the shaft. This construction and manner of connection serves to automatically align the capsule on the arrow for proper flight.
When an arrow carrying the capsule impacts the target, for example, a game animal, the capsule bursts at the fracture zones to allow the walls to separate, thereby releasing the marking material which marks the point of impact. The inner wall of the capsule may remain fixed in place on the shaft, while the outer wall separates to continue to deposit the marking material externally on the animal as the arrow penetrates the flesh after impact.
These and other features, advantages and a fuller understanding of the invention will be had from the following detailed description taken in conjunction with the accompanying drawings.

DESCRIPTION OF THE DRAWINGS

FIG. 1 is an elevational view showing the capsule of the invention mounted on a broadhead arrow;

FIG. 2 is an elevational view partially in cross-section showing details of the capsule and the connection of the broadhead to the shaft;

FIG. 3 is an enlarged, cross-sectional view showing the construction of the capsule;

FIG. 4 is an elevational view showing the arrow as it impacts the target;

FIG. 5 is an exploded view of the capsule showing its rear wall; and

FIG. 6 is a assembled, elevational view of the capsule.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to the drawings, reference numeral 10 designates a conventional broadhead arrow which carries the capsule 11 of the invention. The arrow 10 includes a shaft 12 and a broadhead 13. While the capsule of the invention is illustrated and described in combination with a broadhead arrow, it is to be understood that the capsule could be carried on a field-point arrow, as well as used with other projectiles that strike a target. The capsule 11 is filled with a suitable marking material 14 that is disbursed on the target in a manner to be described upon impact of the arrow. Suitable marking materials include wet or dry brightly colored dyes, food colorant, or the like.
The capsule 11 has a forward end 15 next to the broadhead 13, an inner wall 17, an outer wall 18, and a rear wall 19. In the illustrated embodiment, the end wall 16 consists of sections 16 a and 16 b. The walls 16 a and 17-19 form a chamber 20 that contains the marking material 14. The front wall section 16 b extends radially inwardly of the inner wall 17 and has a center hole 25. The inner wall 17 forms a passage 27 that receives the end portion of the shaft 12 so that the chamber 20 surrounds the shaft and so that the end of the shaft abuts the wall section 16 b. As shown, the threaded male neck of the broadhead 13 extends through the hole 25 and is threaded into the end of the shaft 12, thereby securing the front wall section 16 b between the broadhead 13 and the end on the arrow shaft.
The capsule 11 is molded from a material, such a polymerized styrene or the like, that will fracture in one or more fracture zones formed in the capsule walls. These fracture zones may consist of breakaway grooves molded in the walls. In the illustrated embodiment, a breakaway groove 31 is located in the forward end 15 of the capsule at the juncture of the wall section 16 a and the outer wall 18 so that the outer wall will separate from the front wall 16. In order to insure complete separation of the outer wall 18 from the front wall 16, the wall section 16 b may be made thicker, for example, twice as thick, than the wall section 16 a and the outer wall 18. Additional breakaway grooves 32 are formed in the outer wall 18. These grooves 32 extend endwise of the capsule, that is, from the front wall 16 to the rear wall 19, so that the outer wall will separate into several sections. The separation of the outer wall 18 into sections protects the arrow fletching (not shown) from being damaged by the capsule as it breaks apart. An additional breakaway groove 33 may be formed in the rear wall 19.
During assembly, the capsule chamber 20 is filled with the marking material 14 and the rear wall 19 is sealed to the walls 17 and 18 by adhesive, sonic welding or in any other suitable manner. The filled capsule is then slid onto the end of the arrow shaft 12 and the male portion 30 of the broadhead or field-point is inserted through the hole 25 in front wall section 16 b of the capsule and threaded into the end of the arrow shaft. The insertion of the broadhead or field-point through the front wall 16 into the threaded connection with the arrow shaft automatically aligns or centers the capsule on the arrow for proper arrow flight.
The use of the arrow 10 will be largely apparent from the foregoing description. When the arrow is launched by a compound bow, cross-bow or traditional bow and strikes the target, the capsule fractures at the grooves 31-33 to release the marking material 14. The marking material 14 marks the point of impact with the target as shown in FIG. 4, for example, the hide 32 of the game animal, thereby affording the archer with immediate visualization of the placement of the shot.
Among other features of the invention, it will be seen that the capsule 11 has been designed so that no alterations need be made to the broadhead or field-point arrow. The overall length of the capsule is small, for example, about 0.500 inches, so that the capsule does not interfere with the arrow rest on a compound-bow, the arrow launcher on a traditional bow, or with the barrel of a crossbow. Another advantage is that an arrow loaded with the capsule can be used in capped quivers where the arrowhead is embedded in the cap.
Many modifications and variations of the invention will be apparent to those skilled in the art in light of the foregoing disclosure. Therefore, it is to be understood that, within the scope of the appended claims, the invention can be practiced otherwise as specifically shown and described.

Claims

1. A capsule that mounts on the shaft of an arrow for releasing a target marking material when the arrow impacts a target, said capsule comprising walls, including an inner wall and an outer wall, forming a chamber for containing the target marking material, said inner wall defining a passage for receiving the end portion of the arrow shaft with said chamber surrounding the shaft, and at least one wall fracture zone in said walls that breaks upon impact of the arrow to allow the capsule walls to separate and release the target marking material from said chamber.

2. The capsule as claimed in claim 1 including a wall portion extending radially inwardly of said inner wall, and a center hole in said wall portion for receiving the neck of an arrowhead so that the neck can be secured to the end of an arrow shaft in said passage.

3. The capsule as claimed in claim 1 wherein said at least one wall fracture zone is around one end of said capsule.

4. The capsule as claimed in claim 1 comprising a plurality of said wall fracture zones.

5. The capsule as claimed in claim 1 comprising first and second capsule ends and a plurality of discrete wall fracture zones in said outer wall extending endwise of said capsule.

6. The capsule as claimed in claim 5 including a wall fracture zone around said first end of said capsule.

7. A capsule that mounts on the shaft of an arrow for releasing a target marking material when the arrow impacts a target comprising walls, including an outer wall and an inner wall, forming a chamber for containing the target marking material, said inner wall defining a passage for receiving the end portion of an arrow shaft with said chamber surrounding said shaft, and a plurality of individual breakaway grooves in said walls that fracture upon impact of the arrow to permit the capsule walls to separate and release the target marking material from said chamber.

8. The capsule as claimed in claim 7 comprising capsule ends and a plurality of discrete breakaway grooves in said outer wall extending endwise of said capsule.

9. The capsule as claimed in claim 8 including a circular breakaway groove formation in one of said capsule ends.

10. The capsule as claimed in claim 9 including a wall portion extending radially inwardly of said inner wall, and a center hole in said wall portion for receiving the neck of an arrowhead so that the neck can be secured to the end of an arrow shaft in said passage.

11. A marking arrow comprising a shaft, an arrowhead, and a capsule mounted on said shaft next to the arrowhead, said capsule having walls, including an inner wall and an outer wall, forming a chamber for containing a target marking material, said inner wall defining a passage receiving an end portion of the arrow shaft, and a plurality of breakaway grooves in said walls that break on impact of the arrow to permit the capsule walls to separate and release the marking material from said chamber, said breakaway grooves including a circular groove formation in one end of said capsule next to the arrowhead and a plurality of discrete grooves in said outer wall extending endwise of said capsule between said one end and the end opposite said one end.

12. The marking arrow as claimed in claim 11 including a rear chamber wall and a breakaway groove in said rear wall.

13. The marking arrow as claimed in claim 11 wherein said one end of said capsule has a wall portion having a center hole and extending radially inwardly of said inner wall, and wherein said arrowhead has a neck extending through said hole into engagement with said end portion of shaft in said passage.