Abstract:
Example nocks, arrowheads and/or arrowhead inserts include a tapered annular flange axially engaging a correspondingly tapered edge on a tubular arrow shaft. The tapered flange and edge help prevent the end of tubular arrow shaft from deforming radially outward when substantial axial force is applied to the nock, arrowhead and/or arrowhead insert.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of U.S. Provisional Patent Application Ser. No. 61/721,583 filed on Nov. 2, 2012, the entire contents of which are incorporated by reference herein. 
    
    
     FIELD OF THE INVENTION 
     The disclosed invention generally pertains to arrows and more specifically to nocks, arrowheads and other end pieces attachable to a hollow or solid arrow shaft. 
     BACKGROUND OF THE INVENTION 
     Arrows, bolts and/or projectiles for bows and crossbows typically include at least one insert disposed and engaged within the interior of at least one of the opposite ends of an arrow, bolt, or projectile shaft. The inserts are adapted to receive a replaceable head or arrowhead and/or a nock. Generally, the opposite ends of the arrow, bolt or projectile shaft are flat and are perpendicular to longitudinal direction of the shaft. During release of an arrow, bolt or projectile, and the striking of a target, one or both of the opposite ends of the arrow, bolt or projectile shaft will be exposed to significant forces occurring as a result of the radial pressure acting upon the inserts, and/or arrowhead, and the nock relative to the end of the shaft, which in turn may cause fracture or cracking of one or both of the opposite ends of the arrow, bolt or projectile shaft, as the inserts and/or arrowhead, or nock are forced toward the center of the shaft. 
     The present invention counteracts the radial forces acting on the opposite ends of the arrow, bolt or projectile shaft, reducing frequency of cracking or fracture of the shaft, prolonging the useful life of the arrow, bolt or projectile. 
     All US patents and applications and all other published documents mentioned anywhere in this application are incorporated herein by reference in their entirety. 
     Without limiting the scope of the invention a brief summary of some of the claimed embodiments of the invention is set forth below. Additional details of the summarized embodiments of the invention and/or additional embodiments of the invention may be found in the Detailed Description of the Invention below. 
     A brief abstract of the technical disclosure in the specification is provided as well only for the purposes of complying with 37 C.F.R. 1.72. The abstract is not intended to be used for interpreting the scope of the claims. 
     BRIEF SUMMARY OF THE INVENTION 
     In at least one embodiment, the invention herein is in general directed to an arrow device which includes a tubular shaft having a first end and a second end, the first end having a first bevel, and the second end having a second bevel. A nock is engaged to the first end, the nock comprising a first shank disposed in the tubular shaft, the nock further comprising a sixth bevel which is constructed and arranged for positioning adjacent to the first bevel. An insert is engaged to the second end, the insert comprising a second shank disposed in the tubular shaft, the insert further comprising a fifth bevel which is constructed and arranged for positioning adjacent to the second bevel. The insert further includes a third bevel located opposite to the second shank. A head is engaged to the insert proximate to the third bevel, the head comprising a fourth bevel which is constructed and arranged for positioning adjacent to the third bevel. 
     In at least one embodiment, a nock insert for use with an arrow shaft comprises a shank arranged to be inserted into the arrow shaft, an annular flange and a notch arranged to receive a bowstring. The annular flange surrounds the shank and comprises a beveled surface arranged to abut an end of the arrow shaft. 
     These and other embodiments which characterize the invention are pointed out with particularity in the claims annexed hereto and forming a part hereof. However, for a better understanding of the invention, its advantages and objectives obtained by its use, reference can be made to the drawings which form a further part hereof and the accompanying descriptive matter, in which there are illustrated and described various embodiments of the invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a partial cross-sectional side view of the opposite ends of one alternative embodiment of an arrow, bolt or projectile of the invention disclosed and described herein. 
         FIG. 2  is a partial cross-sectional side view of the opposite ends of one alternative embodiment of an arrow, bolt or projectile of the invention disclosed and described herein. 
         FIG. 3  is a partial cross-sectional side view of the opposite ends of one alternative embodiment of an arrow, bolt or projectile of the invention disclosed and described herein. 
         FIG. 4  is a partial cross-sectional side view of the opposite ends of one alternative embodiment of an arrow, bolt or projectile of the invention disclosed and described herein. 
         FIG. 5  is a partial cross-sectional side view of the opposite ends of one alternative embodiment of an arrow, bolt or projectile of the invention disclosed and described herein. 
         FIG. 6  is a partial cross-sectional side view of the opposite ends of one alternative embodiment of an arrow, bolt or projectile of the invention disclosed and described herein. 
         FIG. 7  is a partial cross-sectional side view of the opposite ends of one alternative embodiment of an arrow, bolt or projectile of the invention disclosed and described herein. 
         FIG. 8  is a partial cross-sectional side view of the opposite ends of one alternative embodiment of an arrow, bolt or projectile of the invention disclosed and described herein. 
         FIG. 9  shows another embodiment of a nock. 
         FIG. 10  shows another embodiment of a nock. 
         FIG. 11  is a partial cross-sectional side view of the opposite ends of one alternative embodiment of an arrow, bolt or projectile of the invention disclosed and described herein. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     While this invention may be embodied in many different forms, there are described in detail herein specific embodiments of the invention. This description is an exemplification of the principles of the invention and is not intended to limit the invention to the particular embodiments illustrated. 
     For the purposes of this disclosure, like reference numerals in the figures shall refer to like features unless otherwise indicated. 
     In at least one alternative embodiment,  FIG. 1  shows an arrow device  10  that comprises a tubular shaft  12  which is elongate in a longitudinal direction  14 . Tubular shaft  12  has an outer surface  16 , an inner surface  18 , a first end  20  and a second end  22 . The first end  20  includes a first bevel  42  and the second end  22  includes a second bevel  44  such that in at least one embodiment inner surface  18  is longer than outer surface  16  as measured in the longitudinal direction  14 . 
     In at least one alternative embodiment, arrow device  10  includes a nock  24  with a string-receiving notch  40 . Nock  24  comprises a first shank  26  and a first tapered annular flange  28 . First shank  26  extends into the tubular shaft  12  to engage the inner surface  18 . The first tapered annular flange  28  engages the first beveled end  20  of tubular shaft  12 . 
     In some alternative embodiments, arrow device  10  includes an insert  30  comprising a second shank  32  and a second tapered annular flange  34 . The second shank  32  extends into tubular shaft  12  to engage inner surface  18 . The second tapered annular flange  34  engages the second beveled end  22  of the tubular shaft  12 . In some alternative embodiments, a head or arrowhead  36  is screwed into or otherwise engaged to the insert  30 . 
     In some alternative embodiments, arrow device  10  includes fletching  38 . 
     In at least one embodiment nock  24  and/or insert  30  have a greater material density than the material used to form the tubular shaft  12 . 
     In some alternative embodiments, the nock  24  and the insert  30  are examples of beveled end pieces for an arrow, bolt or projectile. In some alternative embodiments, head or arrowhead  36  has a third tapered annular flange  46  which is similar to the second tapered annular flange  34  and the first tapered annular flange  28 . The head or arrowhead  36  has fourth bevel  48  which connects to the third bevel  50  of insert  30  for an arrow, bolt or projectile. 
     In at least one embodiment, continuing to refer to  FIG. 1 , the third bevel  50  and the matching fourth bevel  48  extend at an angle with respect to the head or arrowhead  36  of the arrow, bolt, or projectile. In some embodiments, the angle between the third bevel  50  and the exterior edge of the second shank  32  will be equal to or less than 85°, and in some embodiments equal to or less than 60°, or even 45°. In other embodiments, the angle between the exterior edge of the second shank  32  and the third bevel  50  will be equal to or greater than 5° and equal to or less than 85°. In some embodiments, the second shank  32 , insert  30 , and the forward member  52  of the insert  30 , are cylindrical, or ring-shaped. In some embodiments, the third tapered annular flange  46  is circular in shape to position and engage the third bevel  50  to the fourth bevel  48 . In some embodiments, the angle of the fourth bevel  48  relative to the second shank  32  is equal to 180° minus the angle between the third bevel  50  and the second shank  32 , and will be equal to, or greater than 95° and equal to or less than 175°. 
     In at least one embodiment, the forward member  52  of the insert  30  includes a rearwardly disposed fifth bevel  54 . In at least one embodiment, the angle between the exterior edge of the second shank  32  and the fifth bevel  54  is identical to the angle between the second shank  32  and the third bevel  50 . In other embodiments, the angle between the fifth bevel  54  and the second shank  32  will not be identical to the angle between the third bevel  50  and the second shank  32 . 
     At least one embodiment, the fifth bevel  54  extends at an angle relative to the head or arrowhead  36  of the arrow, bolt or projectile. In some embodiments the angle between the fifth bevel  54  and the second shank  32  will be more than 95° and less than 175°. 
     In at least one embodiment, the tubular shaft  12  includes the second bevel  44 . In at least one embodiment, the angle between the exterior edge of the second shank  32  and the second bevel  44  is identical to the angle between the second shank  32  and the third bevel  50 . In other embodiments, the angle between the second bevel  44  and the second shank  32  will not be identical to the angle between the third bevel  50  and the second shank  32 . In at least one embodiment, the second bevel  44  extends at an angle relative to the head or arrowhead  36  of the arrow, bolt or projectile. In some embodiments, the angle between the second bevel  44  and the second shank  32  will be equal to or less than 85° and greater than or equal to 5°. In some embodiments, the angle between the fifth bevel  54  relative to the second shank  32  is equal to 180° minus the angle between the second bevel  44  and the second shank  32 , and will be equal to or greater than 95° and less than or equal to 175°. 
     Continuing to refer to  FIG. 1 , in at least one embodiment nock  24  having first shank  26  is inserted within and/or releasably engaged to the interior of the first end  20  of the tubular shaft  12 . The nock  24  includes the first tapered annual flange  28 , and in some embodiments a sixth bevel  56 . In at least one embodiment, the sixth bevel  56  is constructed and arranged to be positioned adjacent to, and to engage the first bevel  42 . 
     In at least one embodiment, the sixth bevel  56  matches the first bevel  42  and extends angularly away from the nock  24  towards the head or arrowhead  36  of the arrow, bolt or projectile. In some embodiments, the angle between the first bevel  42  and the exterior edge of the first shank  26  will be equal to or less than 85°, and in some embodiments equal to or less than 60°, or even 45°. 
     In some embodiments the nock  24  and the first tapered annular flange  28  are cylindrical, circular, and/or ring-shaped to position, match, and to engage the sixth bevel  56  to the first bevel  42  of the shaft  12 . In some embodiments, the angle of the sixth bevel  56  relative to the first shank  26  is equal to 180° minus the angle between the first bevel  42  and the first shank  26 , and will be equal to or greater than 95° and equal to or less than 175°. 
     In at least one embodiment the angle selected for the first bevel  42  relative to the first shank  26  is equal to, or different as compared to, either of the angle selected for the second bevel  44  relative to the second shank  32 , or the angle selected for the third bevel  50  relative to the second shank  32 . In at least one embodiment, none of the angles of the first bevel  42  relative to the first shank  26 , or the second bevel  44  relative to the second shank  32 , or the third bevel  50  relative to the second shank  32  are equal or identical. In other embodiments, all of the bevel angles for the first bevel  42 , the second bevel  44 , and the third bevel  50  are equal. In alternative embodiments, two or more of the bevel angles for the first bevel  42 , second bevel  44  and third bevel  50  are equal or unequal in dimension, in any combination. 
     In some embodiments, the first bevel  42 , second bevel  44 , third bevel  50 , fourth bevel  48 , fifth bevel  54 , and/or sixth bevel  56  are linear in shape. In alternative embodiments, any one or more of the matching pairs of bevel&#39;s, such as the first bevel  42  and sixth bevel  56 , the second bevel  44  and the fifth bevel  54 , and the third bevel  50  and the fourth bevel  48  may not be linear, and may be curved, arctuate, parabolic, etc., provided that the bevel edges of each matching pair of bevels are configured for nesting engagement relative to each other. For example,  FIGS. 9 and 10  show embodiments of a nock  24  comprising a bevel  56  having curvature. The bevel  56  can comprise any suitable shape and orientation. In some embodiments, the curvature is concave with respect to the tubular shaft  12 , as shown in  FIG. 9 . In some embodiments, the curvature is convex with respect to the tubular shaft  12 , as shown in  FIG. 10 . Desirably, the bevel  56  is arranged such that at least a portion of the nock  24  surrounds a portion of the tubular shaft  12 , allowing the nock  24  to provide reinforcement in a radially inward direction. 
     In some embodiments, only one pair of three matching pairs of bevel edges are not linear, and in alternative embodiments, two or all three of the matching pairs of bevel edges are not linear. In further embodiments, any combination of matching pairs of bevel edges may include linear or nonlinear edges, which may be incorporated into the arrow device  10 , as described herein without limitation or restriction. For example, the pair of bevel edges  42  and  56  may be linear, and a pair of bevel edges  44  and  54  may not be linear, while the pair of bevel edges  50  and  48  may be either linear or nonlinear. Any combination of matching pairs of bevel edges may be provided herein. 
     In at least one embodiment, as an arrow device  10  is released from a drawn position, or as head or arrowhead  36  strikes an object, radial forces are exposed/projected onto first tapered annular flange  28  and second tapered annular flange  34  in the direction of arrow  58 . Radial forces  58  at the first tapered annular flange  28  and the second tapered annular flange  34  desirably reduce potential for damage to the tubular shaft  12 . 
     In some embodiments, the inclusion of any combination of the first bevel  42 , second bevel  44 , third bevel  50 , fourth bevel  48 , fifth bevel  54 , and/or sixth bevel  56 , assist to redistribute, or to dissipate forces acting on the first tapered annular flange  28  and/or the second tapered annular flange  34 , to reduce potential for damage to the tubular shaft  12  proximate to the first and  20  or the second and  22 . 
     In at least one embodiment, the inclusion of the matching pairs of beveled edges  42  and  56 ;  44  and  54 ; and  50  and  48  function to counteract and to reduce the radial outward forces exposed to the first end  20  and the second end  22  of shaft  12  in the direction of arrow  58 . Desirably, portions of an outer member positioned to surround an inner member will reinforce the inner member. For example, portions of a nock  24  that are positioned to surround the tubular shaft  12  (e.g. bevel  56  and annular flange  28 ) will reinforce the tubular shaft  12  against expanding in diameter. 
     The matching pair of bevel edges  42  and  56  provide engagement between the nock  24  and the first tapered annular flange  26  to reduce any potential for cracking and/or fracture of the first end  20  of the tubular shaft  12 . The matching pair of bevel edges  44  and  54  provide an engagement between the insert  30  and the second tapered annular flange  24  to reduce a potential for cracking and/or fracture of the second end  22  of the tubular shaft  12 . 
     The matching pair of bevel edges  50  and  48  provide an engagement between the insert  30  and the third tapered annular flange  46  to reduce a potential for cracking and/or fracture of the second end  22  of the tubular shaft  12  or the insert  30 . The engagement between the matching pairs of bevel edges enhances the structure of the arrow device  10  to minimize the effects of the radial outward forces  58 , in turn reducing a potential for cracking or fracture of the first end  20  and second end  22  of the tubular shaft  12 . 
     In at least one embodiment as depicted in  FIG. 2 , the fourth bevel  48  includes a double edge forming a point which is positioned at the approximate center of the forward member  52  of the insert  30 . In this embodiment, the third bevel  50  is shaped to include a channel to receive the double edge/point of the fourth bevel  48 . In some embodiments, the point of the double edge of the fourth bevel  48  may be offset from the center of the tubular wall of the forward member  52  of the insert  30  internally towards the center of the tubular shaft  12 , or outwardly toward the outer surface  16  of the tubular shaft  12 . In this embodiment, the attributes, functions and features of the first bevel  42 , sixth bevel  56 , second bevel  44 , and the fifth bevel  54  are substantially identical to the embodiments previously described with respect to  FIG. 1 . 
     In at least one embodiment as depicted in  FIG. 3 , the fifth bevel  54  includes a double edge forming a point which is positioned at the approximate center of the wall of the tubular shaft  12 . In this embodiment, the second bevel  44  is shaped to include a channel to match and receive the double edge/point of the fifth bevel  54 . In some embodiments, the point of the double edge of the fifth bevel  54  may be offset from the center of the wall of the tubular shaft  12  internally towards the center, or may be offset outwardly toward the outer surface  16  of the tubular shaft  12 . In this embodiment, the attributes, functions and features of the first bevel  42 , sixth bevel  56 , third bevel  50 , and the fourth bevel  48  are substantially identical to the embodiment previously described with respect to  FIG. 1 . 
     When a bevel includes a double edge forming a point, in some embodiments, the beveled surface forms a V-shape. When two of such V-shaped surfaces abut one another (e.g.  48 ,  50  in  FIG. 2 ), the V-shapes can provide for a self-alignment between the two surfaces. For example, the point of the V-shape of one surface nests within the valley of the V-shape of the other surface. Additionally, in some embodiments, multiple V-shaped portions are positioned at a plurality of locations about an interface (e.g.  48 ,  50  in  FIG. 2 ) between two abutting objects (e.g.  30 ,  36  in  FIG. 2 ), for example being a plurality of individual, spaced V-shaped portions or continuous V-shaped surfaces that extend continuously about the objects. Such V-shaped portions and/or surfaces can provide for coaxial alignment of the central axes of the objects. 
     In at least one embodiment as depicted in  FIG. 4 , the fourth bevel  48  includes a double edge forming a point which is positioned at the approximate center of the forward member  52  of the insert  30  as described with respect to  FIG. 2 . The other features, attributes, and functions as related to the fourth bevel  48  as described relative to  FIG. 2  are equally applicable to  FIG. 4  herein. In addition, in some embodiments as depicted in  FIG. 4 , the fifth bevel  54  includes a double edge forming a point which is positioned at the approximate center of the tubular shaft  12  as described with respect to  FIG. 3 . The other features, attributes, and functions as related to the fifth bevel  54  as described relative to  FIG. 3  are equally applicable to  FIG. 4  herein. In some embodiments, the features, attributes, and functions as related to  FIGS. 2 and 3  herein have been incorporated into the embodiment as depicted in  FIG. 4 . In the embodiment as depicted in  FIG. 4  the features, attributes, and functions of the first bevel  42  and the sixth bevel  56  are substantially identical to the embodiment as previously described with respect to  FIG. 1 . 
     In at least one embodiment as depicted in  FIG. 5 , the sixth bevel  56  includes a double edge forming a point which is positioned at the approximate center of the wall of the first end  20  of the tubular shaft  12 . In this embodiment, the first bevel  42  is shaped to include a channel to match and receive the double edge/point of the sixth bevel  56 . In some embodiments the point of the double edge of the sixth bevel  56  may be offset from the center of the wall of the tubular shaft  12  towards the center, or alternatively may be offset outwardly towards the outer surface  16 . In this embodiment, the second bevel  44 , fifth bevel  54 , third bevel  50  and fourth bevel  48  have the attributes, features, and functions, and are substantially identical to the embodiment previously described with respect to  FIG. 1 . 
     In at least one alternative embodiment as depicted in  FIG. 6 , the third bevel  50  and the fourth bevel  48  have the features, attributes, and functions as previously described relative to  FIG. 1 . In at least one embodiment the fifth bevel  54  includes a double edge forming a point, and the second bevel  44  includes a channel as previously described as related to  FIGS. 3 and 4 , having the features, attributes, and functions as previously described. In at least one embodiment the sixth bevel  56  includes a double edge forming a point and the first bevel  42  includes a channel as previously described with respect to  FIG. 5 , which includes the features, attributes and functions as previously described herein. 
     In at least one embodiment as depicted in  FIG. 7 , the fourth bevel  48  includes a double edge forming a point, and the third bevel  50  includes a channel having the features, attributes and functions as previously described related to  FIGS. 2 and 4 . In addition, in at least one embodiment, the fifth bevel  54  and the second bevel  44  include the features, attributes and functions as previously described relative to  FIG. 1 . In some embodiments, the sixth bevel  56  includes a double edge forming a point and the first bevel  42  includes a channel as previously described as related to  FIGS. 5 and 6 , which includes the features, attributes, and functions as previously described. 
     In at least one embodiment as depicted in  FIG. 8 , the fourth bevel  48  includes a double edge forming a point, and the third bevel  50  includes a channel having the features, attributes and functions as previously described related to  FIGS. 2 ,  4 , and  7 . In addition, at least one embodiment, the fifth bevel  54  includes a double edge forming a point, and the second bevel  44  includes a channel having the features, attributes, and functions as previously described related to  FIGS. 3 ,  4 , and  6 . In at least one embodiment, the sixth bevel  56  includes a double edge forming a point and the first bevel  42  includes a channel as previously described as related to  FIGS. 5 ,  6 , and  7  which include the features, attributes, and functions as previously described. 
       FIG. 11  shows another embodiment of an arrow, bolt or projectile. When a bevel (e.g.  42 ,  44 ,  48 ,  50 ,  54 ,  56 ) includes a double edge forming a point, the point can be oriented in any suitable direction. In some embodiments, a bevel (e.g.  48 ) comprises a V-shape oriented in a first direction, such as a first axial or forward direction with respect to the arrow, as illustrated in  FIG. 11 . In some embodiments, a bevel (e.g.  48 ) comprises a V-shape oriented in a second direction that is opposite the first direction. For example, the second direction can be a second axial or backwards direction with respect to the arrow, as illustrated in  FIG. 8 . 
     In some embodiments, one or both of the insert  30  and/or the nock  24  may be formed of one or more materials which are selected to provide force absorption, force redirection, force dissipation, or cushion, having a coefficient of elasticity and/or compression which is utilized to reduce potential for cracking and/or fracture of the first end  20  and/or second end  22  of the tubular shaft. In some embodiments the density and/or coefficient of elasticity of the material selected for the insert  30  and/or the nock  24  may vary between the respective first shank  26  or second shank  32 , and the end of either of the insert  30  or nock  24 . 
     In at least one embodiment, the inclusion of additional material, or denser material, in the area of the first tapered annular flange  28 , second tapered annular flange  34 , and third tapered annular flange  46  reduces the potential for cracking or fracture of the first end  20  or the second end  22  of the tubular shaft. 
     In some alternative embodiments, the inclusion of the first bevel  42  and the sixth bevel  56 ; the second bevel  44  and the fifth bevel  54 ; and the third bevel  50  and the fourth bevel  48 , reduce potential for cracking and/or fracture of the first end  20  and/or the second end  22  of the tubular shaft  12 . 
     In at least one embodiment, the angle between the first bevel  42  and the first shank  26 ; the second bevel  44  and the second shank  32 ; and the third bevel  50  and the second shank  32  is approximately 75°. In alternative embodiments the angle for the first bevel  42 , second bevel  44  and the third bevel  50  may be increased or decreased to minimize risk of cracking or fracture of the first end  20  or second end  22  of the arrow shaft  12 . 
     In at least one alternative embodiment, any one or more of the fourth bevel  48 ; fifth bevel  54  and sixth bevel  56  may include a single, double, or more than two edges similar to a matching tooth and groove design. In some embodiments, the sides of the edges of a double bevel for the fourth bevel  48 ; fifth bevel  54  and six bevel  56  may have the same length dimension or angle. In alternative embodiments, the sides of the edges of a double bevel for the fourth bevel  48 ; fifth bevel  54  and six bevel  56  may either have the same length dimension or angle or different length dimensions or angles in any combination. 
     In some alternative embodiments the receiving channel(s) of the third bevel  50 , second bevel  44  and/or first bevel  42  each include a corresponding or mating number of channels, angles, dimensions, and/or shapes to receive the respective fourth bevel  48 , fifth bevel  54  and six bevel  56  for the arrow device  10  as provided in any combination of elements. 
     In a first alternative embodiment, an arrow device comprises a tubular shaft having a first end and a second end, the first end having a first bevel, said second end having a second bevel; a nock engaged to the first end, the nock comprising a first shank disposed in the tubular shaft, the nock further comprising a sixth bevel constructed and arranged for positioning adjacent to the first bevel; an insert engaged to the second end, the insert comprising a second shank disposed in the tubular shaft, the insert further comprising a fifth bevel constructed and arranged for positioning adjacent to the second bevel and a third bevel opposite to the second shank; and a head engaged to the insert, the head comprising a fourth bevel constructed and arranged for positioning adjacent to the third bevel. 
     In a second alternative embodiment according to the first alternative embodiment, the first bevel is at an acute angle relative to the tubular shaft. 
     In a third alternative embodiment according to the first alternative embodiment, the second bevel is at an acute angle relative to the tubular shaft. 
     In a fourth alternative embodiment according to the first alternative embodiment, the third bevel is at an acute angle relative to the tubular shaft. 
     In a fifth alternative embodiment according to the first alternative embodiment, the first bevel and the second bevel are at an acute angle relative to the tubular shaft. 
     In a sixth alternative embodiment according to the first alternative embodiment, the first bevel and the third bevel are at an acute angle relative to the tubular shaft. 
     In a seventh alternative embodiment according to the first alternative embodiment, the second bevel and the third bevel are at an acute angle relative to the tubular shaft. 
     In an eighth alternative embodiment according to the first alternative embodiment, the first bevel, the second bevel and the third bevel are at an acute angle relative to the tubular shaft. 
     In a ninth alternative embodiment according to the first alternative embodiment, the first bevel comprises a channel and the sixth bevel comprises a point. 
     In a tenth alternative embodiment according to the first alternative embodiment, the second bevel comprises a channel and the fifth bevel comprises a point. 
     In an eleventh alternative embodiment according to the first alternative embodiment, the third bevel comprises a channel and the fourth bevel comprises a point. 
     In a twelfth alternative embodiment according to the first alternative embodiment, the first bevel comprises a channel and the sixth bevel comprises a point and the second bevel comprises a channel and the fifth bevel comprises a point. 
     In a thirteenth alternative embodiment according to the first alternative embodiment, the first bevel comprises a channel and the sixth bevel comprises a point and the third bevel comprises a channel and the fourth bevel comprises a point. 
     In a fourteenth alternative embodiment according to the first alternative embodiment, the second bevel comprises a channel and the fifth bevel comprises a point and the third bevel comprises a channel and the fourth bevel comprises a point. 
     In a fifteenth alternative embodiment according to the first alternative embodiment, the first bevel comprises a channel and the sixth bevel comprises a point, the second bevel comprises a channel and the fifth bevel comprises a point, and the third bevel comprises a channel and the fourth bevel comprises a point. 
     In a sixteenth alternative embodiment according to the first alternative embodiment, the nock further comprises a first tapered annular flange wherein the sixth bevel is a surface of the first tapered annular flange. 
     In a seventeenth alternative embodiment according to the first alternative embodiment, the insert further comprises a second tapered annular flange wherein the fifth bevel is a surface of the second tapered annular flange. 
     In an eighteenth alternative embodiment according to the first alternative embodiment, the head further comprises a third tapered annular flange wherein the fourth bevel is a surface of the third tapered annular flange. 
     In a nineteenth alternative embodiment according to the first alternative embodiment, each of the first bevel, the second bevel, and the third bevel have an outer surface, and at least one of the outer surface for the first bevel, the second bevel, and the third bevel is substantially linear. 
     In a twentieth alternative embodiment according to the first alternative embodiment, each of the first bevel, the second bevel, and the third bevel have an outer surface, and at least one of the outer surfaces for the first bevel, the second bevel, and the third bevel are arcuate. 
     The above examples and disclosure are intended to be illustrative and not exhaustive. These examples and description will suggest many variations and alternatives to one of ordinary skill in this art. Further, the particular features presented in the dependent claims can be combined with each other in other manners within the scope of the invention such that the invention should be recognized as also specifically directed to other embodiments having any other possible combination of the features of the dependent claims. 
     This completes the description of the alternate embodiments of the invention. Those skilled in the art may recognize other equivalents to the specific embodiment described herein which equivalents are intended to be encompassed by the claims attached hereto.