Abstract:
An arrowhead having interchangeable finely honed cutting blades with opposing broad ground surfaces for slicing through and into a target. Multiple blades are interchangeably secured about a tapered body.

Description:
CROSS REFERENCES TO RELATED APPLICATIONS 
     None. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention is for an arrowhead, and more particularly is for an arrowhead having refined cutting blades. 
     2. Description of the Prior Art 
     Prior art arrowheads have included multiple blades which serve to enter the mass which an arrowhead impinges. Often the blade edges have had no modification or would utilize simple opposed wide-angle bevel cuts to effect a rudimentary cutting, ripping or tearing edge which forced target surfaces apart by brute force action. The lack of good slicing, piercing and parting qualities of the blades resulted in much of the force of the projectile arrow being expended in just breaking through the target surface, thereby leaving less potential energy for deep penetration. As a consequence, an effective shoot, that is, a shoot making a sufficiently deep wound entry to achieve a successful result, was difficult to attain. With the popularity of bow hunting, hunters have expanded the hunt from commonly hunted animals to larger and more challenging prey, such prey having thicker and tougher hides or skin. Against such prey, the effectiveness of prior art arrowheads is even less. Clearly, what is needed is an arrowhead offering adequate cutting qualities which would allow easier entry and deep penetration of a hunter&#39;s arrow into the target or wildlife game. 
     SUMMARY OF THE INVENTION 
     The general purpose of the present invention is to provide an arrowhead having blades with improved cutting edges. 
     According to the present invention, there is provided an arrowhead including a plurality of blades each having a cutting edge which has a narrow cutting angle produced by opposing broad finely ground or honed surfaces which extend inwardly a considerable distance from the outer periphery of the cutting edge toward the center of the arrowhead to effect a narrow profile sharp cutting edge. The blades are interchangeable and replaceable by the user as desired. 
     One significant aspect and feature of the present invention is an arrowhead which can deeply penetrate a target or wildlife game. 
     Another significant aspect and feature of the present invention is an arrowhead having blades which are finely ground, honed or otherwise fashioned to provide for a narrow angle cutting edge along the length of each blade. 
     Still another significant aspect and feature of the present invention is an arrowhead having finely fashioned blades which are cutting instruments of improved effectiveness and efficiency. 
     Yet another significant aspect and feature of the present invention is an arrowhead having blades which penetrate using a slicing action. 
     A further significant aspect and feature of the present invention is an arrowhead which slices a target or wildlife game surface instead of tearing or ripping such target or wildlife game surface, thereby expending minimal energy for initial entry and allowing remaining energy to be utilized for deep penetration into the target or wildlife game. 
     Having thus enumerated significant aspects and features of the present invention, it is the principal object of the present invention to provide an arrowhead having improved sharpened and profiled blades for easy entry into a target or wildlife game. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Other objects of the present invention and many of the attendant advantages of the present invention will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, in which like reference characters designate like parts throughout the figures thereof and wherein: 
         FIG. 1  is an isometric view of an arrowhead, the present invention, mounted to an arrow shaft, shown partially; 
         FIG. 2  is an exploded view of the arrowhead shown in relationship to the arrow shaft; 
         FIG. 3  is an assembled side view of the arrowhead shown in relationship to the arrow shaft; 
         FIG. 4  is a front view of the blades of the arrowhead looking in the direction of the viewing line  4 — 4  of  FIG. 3 ; 
         FIG. 5  is a cross section view of a blade along line  5 — 5  of  FIG. 2 ; and, 
         FIG. 6  is a cross section view of a prior art blade. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       FIG. 1  is an isometric view of an arrowhead  10 , the present invention, in use with and mounted to the partially shown shaft  12  of an arrow. Readily visible components of the arrowhead  10  include a body  14 , which is round and partially tapered. The body  14  includes a three-sided chisel tip  16  at the most forward portion and a plurality of slots  18   a - 18   n  radially placed and extending along the length of the body  14 . The slots  18   a - 18   n  fittingly accommodate a plurality of blades  20   a - 20   n  which are secured therein along and about the body  14 . Each of the similarly constructed blades  20   a - 20   n  has a razor sharp cutting edge  22 . A mounting ferrule  24  is located behind the rearward edges of the blades  20   a - 20   n.    
       FIG. 2  is an exploded view of the arrowhead  10 , the present invention, shown in relationship to the shaft  12  of an arrow. Shown in particular is the blade  20   a  which is illustrated being detached from the body  14 . The blade  20   a , being substantially triangular shaped, includes a bottom edge  26 , a rear edge  28  perpendicular to the bottom edge  26 , a cutting edge  22  extending between the forward portion of the bottom edge  26  and the portion of the rear edge  28  distant from the bottom edge  26 , a mounting tab  30  extending rearwardly from the junction of the rear edge  28  and the bottom edge  26 , and a tip  32  which is the region formed by the junction of the bottom edge  26  and the cutting edge  22 . The body  14 , which is of one-piece construction, includes the chisel tip  16  and also an adjoining nontapered section  36 , an adjoining tapered section  38 , an adjoining nontapered section  40  which is slightly larger than nontapered section  36 , and an adjoining rearwardly extending threaded section  42 . Slots  18   a - 18   n  extend continuously through the tapered section  38  and the nontapered section  40 . The bottoms of the slots  18   a - 18   n  align with the outer surface of the nontapered section  36 . The bottoms of the slots  18   a - 18   n  and the outer surface of the nontapered section  36  form continuous surfaces against which the bottom surfaces  26  of the blades  20   a - 20   n  align. Also shown is one of three undercut bevels  34  at the rearward edge of the chisel tip  16 . The tip  32  and the mounting tab  30  are incorporated for securing of the blade  20   a  in the slot  18   a  as shown in FIG.  3 . 
       FIG. 3  is an assembled side view of the arrowhead  10 , shown in relationship to the arrow shaft  12 , illustrating the mounting of the blade  20   a  to the body  14 . The blade  20   a  is inserted into the slot  18   a  and then advanced to place the tip  32  beneath the undercut bevel  34 . Subsequently, the mounting ferrule  24  is advanced over the nontapered section  40  to capturingly locate over and about the mounting tab(s)  30 . The shaft  12  of the arrow is then threadingly engaged to the threaded section  42  of the tip  14  to maintain the mounting ferrule  24  in a position over and about the mounting tab(s)  30  against the rearward edge of the tapered section  38 . 
       FIG. 4  is a front view of the blades  20   a - 20   n  looking in the direction of the viewing line  4 — 4  of FIG.  3 . 
       FIG. 5  is a cross section view of blade  20   a  along line  5 — 5  of FIG.  2 . Illustrated in particular is the cutting edge  22  formed by opposing broad ground surfaces  44   a  and  44   b  which extend at equal and relatively narrow angles  46   a  and  46   b  with respect to the centerline  48  to provide a narrow-angled entry blade  20   a . The narrow overall angle encompassed by the combination or sum of angles  46   a  and  46   b  can also be expressed as a single narrow angle  49  centered about the centerline  48 . The single narrow angle  49  or the combination of the narrow angles  46   a  and  46   b  can range from 5° to 30° inclusive. The opposing broad ground surfaces  44   a  and  44   b  can be formed by precision grinding, honing or other such method incorporated to form a suitable narrow profile blade  20   a . The opposing broad ground surfaces  44   a  and  44   b  extend inwardly a considerable distance from the outward periphery of the cutting edge  22  to present a thinly formed nonbulky profile which, it will be appreciated, provides a narrow-angled entry blade, especially when compared to a typical prior art blade  50 , shown in  FIG. 6 , having opposing narrow ground surfaces  52   a  and  52   b  forming equal and wide angles  54   a  and  54   b  with respect to the centerline  54 , which gives rise to a wide-angled entry blade. 
     MODE OF OPERATION 
     The chisel tip  16  of the arrowhead  10 , the present invention, first encounters the target or wildlife game to initially create a small puncture to allow initial entry of the arrowhead  10 . Subsequently, the blades  20   a - 20   n , having cutting edges  22  formed by the opposing broad ground surfaces  44   a  and  44   b , at an angle in a range of 5°-25°, and such as 20°, part the target or wildlife game by a slicing action as opposed to ripping or by brute force entry, such as by prior art blades  50 . Such slicing action expends minimal energy for entry, thereby conserving remaining energy to be spent for carriage of the arrowhead past the initial parted surfaces and deep into the target or wildlife game. 
     Various modifications can be made to the present invention without departing from the apparent scope hereof.