Angular weave carbon fiber arrow

Abstract

Devices, systems, and methods for an arrow shaft of an arrow for archery can include a shaft body with circular cross-sectional profile extending for a length in a longitudinal direction and defined by a carbon composite. The carbon composite can include a carbon fiber weave and a binder. The carbon fiber weave comprises at least two sets of tows including a first set of tows and a second set of tows. The first set of woven tows extend longitudinally to define the longitudinal length of the shaft body, and the second set of woven tows are woven into the first set of woven tows with an angle relative to the longitudinal direction.

Description

CROSS-REFERENCE

[0001] This utility application claims the benefit of priority to U.S. Provisional Patent Application No. 63 / 764,703, entitled “ANGULAR WEAVE CARBON FIBER ARROW,” filed on February 28, 2025, the content of which is hereby incorporated by reference in its entirety.TECHNICAL FIELD

[0002] The present disclosure relates generally to arrows, and more specifically to devices, systems, and methods for arrows for archery.BACKGROUND

[0003] Arrow performance can be a challenging task to manage while providing reliable manufacturing for high quality products. Arrow spine can be important to consider in relation to manufacturing and quality control. Traditional constructions and / or materials for arrows may not address performance considerations in modern archery.SUMMARY

[0004] The present application discloses one or more of the features recited in the appended claims and / or the following features which, alone or in any combination, may comprise patentable subject matter.

[0005] According to an aspect of the present disclosure, an arrow assembly for archery may include a shaft body including a hollow circular cross-sectional profile extending for a length in a longitudinal direction, the circular cross-sectional profile defined by a carbon composite. The carbon composite may include a carbon fiber weave and a resin. The carbon fiber weave may include at least two sets of tows including a first set of tows and a second set of tows. The first set of tows may extend longitudinally to define the longitudinal length of the shaft body. The second set of tows may be woven together with the first set of tows with an angle of 30 degrees relative to the longitudinal direction. An arrow head may be coupled with the shaft body at one longitudinal end. An arrow nock may be coupled with the shaft body at another longitudinal end, opposite the one longitudinal end. The nock may be configured for engagement with a bow string of a bow for firing.

[0006] In some embodiments, the first set of tows may be arranged as warp tows. The second set of tows may be arranged as weft tows. The second set of tows may be woven together with the first set of tows with the angle of 30 degrees relative to the longitudinal direction such that the second set of tows wrap to at least partially spiral around a central axis of the shaft body.

[0007] In some embodiments, the carbon composite may include the carbon fiber weave at least partially impregnated with the resin. The resin may be cured. The shaft body may include a seam defined between two edges of the carbon fiber weave. The seam may be at least partially sealed by the resin. The arrow head may include a fixed-blade or mechanical broad head. The arrow head may be coupled with the shaft body via an insert engaged within the hollow of the circular cross-section of the shaft body at the one longitudinal end. In some embodiments, at least one of the first and second set of tows may include 1000 fibers per tow.

[0008] According to another aspect of the present disclosure, an arrow assembly for archery may include a shaft body including a hollow circular cross-sectional profile extending for a length in a longitudinal direction, the circular cross-sectional profile defined by a carbon composite. The carbon composite may include a carbon fiber weave and a resin, wherein the carbon fiber weave comprises at least two sets of tows including a first set of tows and a second set of tows. The first set of tows may extend longitudinally to define the longitudinal length of the shaft body. The second set of tows may be woven together with the first set of tows with an angle of 60 degrees relative to the longitudinal direction. An arrow head may be coupled with the shaft body at one longitudinal end. An arrow nock coupled with the shaft body at another longitudinal end, opposite the one longitudinal end. The nock may be configured for engagement with a bow string of a bow for firing.

[0009] In some embodiments, the first set of tows may be arranged as warp tows. The second set of tows may be arranged as weft tows. The second set of tows may be woven together with the first set of tows with the angle of 60 degrees relative to the longitudinal direction such that the second set of tows wrap to at least partially spiral around a central axis of the shaft body.

[0010] In some embodiments, the carbon fiber weave may include a third set of tows woven together with at least one of the first and second set of tows. The third set of tows may be woven together with at least one of the first and second set of tows at an angle of 90 degrees relative to the longitudinal direction.

[0011] In some embodiments, the carbon composite may include the carbon fiber weave at least partially impregnated with the resin. The resin may be cured. The shaft body may include a seam defined between two edges of the carbon fiber weave. The seam may be at least partially sealed by the resin. The arrow head may include a fixed-blade or mechanical broad head. The arrow head may be coupled with the shaft body via an insert engaged within the hollow of the circular cross-section of the shaft body at the one longitudinal end. At least one of the first and second set of tows may include 3000 fibers per tow.

[0012] According to another aspect of the present disclosure, an arrow shaft for an archery arrow may include a shaft body including a hollow circular cross-sectional profile extending for a length in a longitudinal direction, the circular cross-sectional profile defined by a carbon composite. The shaft body may be configured to couple with an arrow head at one longitudinal end and with an arrow nock at another longitudinal end, opposite the one longitudinal end. The carbon composite may include a carbon fiber weave and a resin. The carbon fiber weave may include at least two sets of tows including a first set of tows and a second set of tows. The first set of tows may extend longitudinally to define the longitudinal length of the shaft body. The second set of tows may be woven into the first set of tows with an angle relative to the longitudinal direction. The angle may be selected from the grouping consisting of 30 degrees and 60 degrees.

[0013] In some embodiments, the second set of tows may be woven into the first set of tows with an angle of 30 degrees relative to the longitudinal direction. At least one of the first and second set of tows may include 1000 fibers per tow. The second set of tows may be woven into the first set of tows with an angle of 60 degrees relative to the longitudinal direction. In some embodiments, at least one of the first and second set of tows include 3000 fibers per tow. The carbon fiber weave may include a third set of tows woven together with at least one of the first and second set of tows. In some embodiments, the third set of tows may be woven together with at least one of the first and second set of tows at an angle of 90 degrees relative to the longitudinal direction.

[0014] Additional features, which alone or in combination with any other feature(s), including those listed above and those listed in the claims, may comprise patentable subject matter and will become apparent to those skilled in the art upon consideration of the following detailed description of illustrative embodiments exemplifying the best mode of carrying out the invention as presently perceived.BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG. 1 is an elevation view of a compound bow having an arrow in a rest position in accordance with certain aspects of the present disclosure;

[0016] FIG. 2 is an elevation view of the compound bow of FIG. 1, showing various positions of the arrow in a drawn position, and in firing positions, in accordance with certain aspects of the present disclosure;

[0017] FIG. 3 is a partially exploded perspective view of an arrow assembly in accordance with certain aspects of the present disclosure;

[0018] FIG. 4 is a perspective view of a portion of the arrow assembly of FIG. 3 in accordance with certain aspects of the present disclosure;

[0019] FIG. 5 is an elevation view of a portion of the arrow assembly of FIGS. 3 and 4 in accordance with certain aspects of the present disclosure;

[0020] FIG. 6 is a partially exploded perspective view of an arrow assembly in accordance with certain other aspects of the present disclosure;

[0021] FIG. 7 is a perspective view of a portion of the arrow assembly of FIG. 6 in accordance with certain aspects of the present disclosure; and

[0022] FIG. 8 is an elevation view of a portion of the arrow assembly of FIGS. 6 and 7 in accordance with certain aspects of the present disclosure.DETAILED DESCRIPTION

[0023] While the concepts of the present disclosure are susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that there is no intent to limit the concepts of the present disclosure to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives consistent with the present disclosure and the appended claims.

[0024] Materials and constructions of arrows for archery should account for the variety of performance considerations of their application. For example, bows, whether compound or traditional, can impart considerable force onto the arrow. Arrow spine can be an important consideration to arrow speed, accuracy, precision, and / or impact force. In the context of archery hunting, such efficiency can be particularly desirable to increase likelihood of hitting the target, but also doing so with the desirable manner to support the overall desired goal.

[0025] Carbon fiber arrow construction can provide desirable performance with light weight. Arrow characteristics can include arrow static spine and arrow dynamic spine. Static spine is traditionally measured by supporting the arrow at two points, spaced apart by standard distance, hanging a standard weight at a midpoint, and measuring the amount of deflection (e.g., thousands of inch). This static spine characteristic can assist in understanding the nature of the arrow, for example, the stiffness imparted under static load.

[0026] Dynamic conditions can provide additional information on the nature of the arrow. Under typical firing, arrows undergo some initial bending or flexing as the rear of the arrow is propelled forward, for example, by a bow string. Referring to FIGS. 1 and 2, in FIG. 1, the arrow 10 is arranged engaged with the bowstring 14 that is supported by the bow riser 16 via limbs 18 in a rest state such that no appreciable loading exists on the arrow. In FIG. 2, the bowstring 14 is drawn into a drawn position with the arrow 10A (now shown in small dashed line) traveling backwards to maintain engagement between a nock of the arrow and the bowstring 14. Under initial release of the bowstring 14, the arrow is initially flexed as suggested in arrow 10B. Further, as the arrow is propelled forward, the initial flexing from firing causes oscillation flexing as suggested in arrow 10C. Although this flexing is illustrative depicted to be predominantly in a vertical plane (direction) in FIG. 2, this flexing can occur in any plane including horizontal. Additionally, it can be appreciated that such flexing may not exist solely as a single curvature having single maximum, but also as multiple curvature having multiple maxima on the same arrow.

[0027] As it can be appreciated, this oscillation flexing dissipates over time (and over distance) as the arrow flies as the dynamic dampened response of the arrow. Dynamic spine can describe the manner that the arrow reacts to the energy imposed by firing. Dynamic spine can be challenging to repeatedly measure and / or analyze, but for descriptive purpose is generally defined as the distance from firing at which the arrow flexing in flight reduces to nominal extent that the arrow is predominantly straight in flight. As a non-limiting and descriptive purpose, dynamic spline may be measured as the distance from the bow riser at which the arrow reaches flexing of less than 5% of maximum flexing in flight.

[0028] Commercially available arrows may have dynamic spine ranging from about 5 to about 10 yards from the bow riser. As discussed herein, devices, systems, and methods within the present disclosure can have dynamic spine within 1 yard from the riser, within 12 inches from the riser, and even particularly within about 5 to about 10 inches from the riser. According it can be appreciated that devices, systems, and methods within the present disclosure can provide improved arrow performance.

[0029] Within the present disclosure, orientation of tows in particular position to manage arrow flexing can dramatically improve dynamic characteristics such as dynamic spine. Aspects within the present disclosure can improve the performance specifically in the multidirectional environment experienced under firing of arrows, for example, forces generated other than directly along the longitudinal length of the arrow.

[0030] Referring now to FIG. 3, an arrow assembly 110 is shown in partially exploded view. Arrow assembly 110 is an exemplary embodiment just as arrow 10. The arrow assembly 110 illustratively includes an arrow shaft 112 having a body 113 extending to define a longitudinal length, illustratively in the vertical direction in the orientation of FIG. 3. On one end 114 of the shaft body 113, an arrow head 116 is configured to couple with the shaft body 113. In the illustrative embodiment, the arrow head 116 is embodied as a broad head that couples with the shaft body 113 via a coupler embodied as a shaft insert 118 having threaded receiver define therein to receive a threaded projection of the end of the arrow head 116. In some embodiments, any suitable manner of arrow head and / or coupling manner may be implemented, for example, fixed and / or mechanical broad heads, field points, and / or direct connection of arrow head to shaft.

[0031] On another end 120 of the shaft body 113, an arrow nock 122 is configured to couple with the shaft body 113. The arrow nock 122 is configured to engage with the bowstring for drawing and firing the arrow. The arrow nock 122 is illustratively embodied to couple with shaft body 113 by insertion within an interior of the body, but in some embodiments may couple by any suitable manner. As discussed in additional detail here, the shaft body 113 is illustratively formed from a carbon composite including a carbon fiber weave and resin.

[0032] Referring to FIG. 4, a portion of the shaft body 113 is shown for ease in viewing the carbon composite. The shaft body 113 illustratively includes a circular cross-section having a hollow interior 124. The carbon composite defines the shaft body 113 illustratively as a roll of a sheet of the carbon fiber at least partially impregnated with resin. The rolled sheet of carbon fiber illustratively defines a seam (not shown) extending longitudinally along the shaft body 113, illustratively comprising a small overlap of the edges of the carbon fiber joined together by resin, although in some embodiments, the edges of the carbon fiber may abut and not overlap.

[0033] In the illustratively embodiment as shown in FIGS. 4 and 5, the carbon fiber weave is shown including two sets of tows woven together. A tow is illustratively defined from a collective set of carbon fibers which extend generally parallel with each other to collectively define the tow as a continuous bundle of untwisted filaments making up a common ribbon. In the illustrative embodiment, each tow is formed from generally similar carbon fibers, but in some embodiments, different ratings of carbon fibers may be applied.

[0034] A first set of tows 126 illustratively extends longitudinally along the shaft body 113. A second set of tows 128 are woven together with the first set of tows 126 at an angle (θ) of 30 degrees. As can be appreciated, the angled arrangement of the second set of tows orients their longitudinal extent across the longitudinal direction of the shaft body 113. Accordingly the longitudinal extent of each of the second set of tows at least partially wrap around the axis of the shaft body 113 in a helical manner at the particular angle (θ) of 30 degrees. This orientation of the second set of tows at rest arranges each tow with particular orientation relative to the direction of flexing of the shaft body 113 that occurs under firing. The inventors of the present disclosure have discover that this critical angle (θ) of 30 degrees provides the unexpected results of enhanced dynamic spine. For example, as mentioned above, enhanced dynamic spine to within a range of about 5 to about 10 inches from bow riser improves considerably, to the extent to define a difference in kind, over commercially available designs. Additionally, angling the second set of tows at an angle of 30 degrees (and no less) relative to the longitudinal direction of the shaft body 113 avoided undesirable crimping during manufacturing as discussed in additional detail herein.

[0035] Referring now to FIGS. 6-8, another embodiment of an arrow assembly 210 is shown. Arrow assembly 210 is similar to arrow assembly 110 and the disclosure of arrow assembly 110 applies equally to the arrow assembly 210, except in instances of conflict with the specific disclosure of arrow assembly 210. In FIG. 6, The arrow assembly 210 illustratively includes an arrow shaft 212 having a body 213 extending to define a longitudinal length, illustratively in the vertical direction in the orientation of FIG. 6. On one end 214 of the shaft body 213, an arrow head 116 is configured to couple with the shaft body 213. In the illustrative embodiment, the arrow head 116 is embodied as the same manner of broad head that couples with the shaft body 113 of arrow assembly 110, via a coupler embodied as a shaft insert 218 having threaded receiver define therein to receive a threaded projection of the end of the arrow head 116, although in some embodiments an arrow head distinct from arrow head 116 may be applied. In some embodiments, any suitable manner of arrow head and / or coupling manner may be implemented, for example, fixed and / or mechanical broad heads, field points, and / or direct connection of arrow head to shaft.

[0036] On another end 220 of the shaft body 213, an arrow nock 122 (illustratively, but not required to be the same as with arrow assembly 110) is configured to couple with the shaft body 213. The arrow nock 122 is configured to engage with the bowstring for drawing and firing the arrow. The arrow nock 122 is illustratively embodied to couple with shaft body 213 by insertion within an interior of the body, but in some embodiments may couple by any suitable manner. A number of fletchings 115 can be affixed to the shaft body at different circumferential locations to guide movement through the air in flight. As discussed in additional detail here, the shaft body 213 is illustratively formed from a carbon composite including a carbon fiber weave and resin.

[0037] Referring to FIG. 7, a portion of the shaft body 213 is shown for ease in viewing the carbon composite. The shaft body 213 illustratively includes a circular cross-section having a hollow interior 224. The carbon composite defines the shaft body 213 illustratively as a roll of a sheet of the carbon fiber at least partially impregnated with resin. The rolled sheet of carbon fiber illustratively defines a seam (not shown) extending longitudinally along the shaft body 213, illustratively comprising a small overlap of the edges of the carbon fiber joined together by resin, although in some embodiments, the edges of the carbon fiber may abut and not overlap.

[0038] In the illustratively embodiment as shown in FIGS. 7 and 8, the carbon fiber weave is shown including three sets of tows woven together. A tow is illustratively defined from a collective set of carbon fibers which extend generally parallel with each other to collectively define the tow as a continuous bundle of untwisted filaments making up a common ribbon. In the illustrative embodiment, each tow is formed from generally similar carbon fibers, but in some embodiments, different ratings of carbon fibers may be applied.

[0039] A first set of tows 226 illustratively extends longitudinally along the shaft body 213. A second set of tows 228 are woven together with the first set of tows 226 at an angle (θ) of 60 degrees. In the illustrative embodiment, a third set of tows 229 is woven together with the first and second set of tows. The third set of tows 229 is illustratively woven such that their longitudinal extent is at an angle of 90 degrees relative to the longitudinal extent of the shaft body 213. As can be appreciated, the angled arrangement of the second set of tows 228 and the angled arrangement of the third set of tows 229 orients each of their longitudinal extent across the longitudinal direction of the shaft body 213. Accordingly the longitudinal extent of each of the second set of tows 228 and each of the third set of tows 229 at least partially wrap around the axis of the shaft body 113 in a helical manner at the particular angle (θ) of 30 degrees and in a circumferential manner at the particular angle of 90 degrees, respectively. This orientation of the second set of tows 228 and the third set of tows 229 at rest collectively arranges each tow with particular orientation relative to the direction of flexing of the shaft body 113 that occurs under firing. The inventors of the present disclosure have discover that this critical angle (θ) of 60 degrees provides the unexpected results of enhanced dynamic spine. Further, in combination with the third set of tows arranged at the particular 90 degree angle, for example, as mentioned above, enhanced dynamic spine to within a range of about 5 to about 10 inches from bow riser improves considerably, to the extent to define a difference in kind, over commercially available designs.

[0040] In manufacturing a shaft body within the present disclosure, a unit of loomed carbon fiber weave can be provided, for example, in a roll of woven sheet carbon fiber. The carbon fiber weave can be weaved on a loom to have the particular angle (θ) defined between the first set of tows which extend longitudinally along the sheet (or roll) and the second set of tows woven together with the first set of tows at the particular angle (θ).

[0041] The rolls of carbon fiber sheeting can be cut or diced into smaller sectional sheets of carbon fiber having a longitudinal length close to the maximum arrow length (e.g., 32 inches) and having a width generally defined as the circumference of the intended shaft body, including any allowance for shrinkage / growth and / or overlap of the edges upon assembly. The sectional sheets can be received onto a mandrel roller having an outer mandrel diameter equal to the desired inner diameter of the shaft body. The mandrel roller rolls the sectional sheet with high pressure to form the initial seam between lateral edges of the sectional sheet to define a cylindrical green part. The sectional sheets can be impregnated with resin and / or may be preimpregnated, and may be applied before and / or after rolling.

[0042] The gran cylindrical part can be heated, for example, within a curing oven to cure the resin into a cured shaft body. The cured shaft body can be refined by grinding an exterior surface to a desired outer diameter for consistent dimensioning. The final shaft body may be further cut to final length. Further assembly with nock and / or arrow head may be applied.

[0043] 1k (Centrifugal) Weave - Weaving carbon fiber at a 30-degree angle relative to the longitudinal sets of tows can include that the individual carbon fiber strands are laid down at a 30-degree angle relative to the primary direction of the fabric, creating a weave pattern with fibers oriented diagonally across the material, which can enhance the material's strength and stiffness in off-axis loading situations, like arrow firing performance, compared with 0 / 90 (or 45) degree weave. Within the present disclosure, improved multi-directional strength can be realized by introducing a 30 degree diagonally arranged fiber orientation in which the material gains unexpectedly high resistance to forces applied at angles other than directly along the fiber length (e.g., the arrow longitude). Such improvements are unexpectedly successful, for example, in reducing dynamic spine dramatically over commercially available designs providing a difference in the nature of the design to such an extent to provide a new category or property of performance.

[0044] 3k Weave - 60 degree carbon fiber weave can include the carbon fiber tows are oriented at a 60 degree angle relative to the longitudinal set of tows. Such weave can include a triaxial weave with a third set of tows arranged at 90 degrees relative to the longitudinal direction, creating a three-directional fabric which can exhibit superior strength and / or shear resistance compared to standard biaxial weaves. In addition to particularly arranged cross tows corresponding in critical manner to the arrow flexing in firing, fibers can run in three directions forming a network that resembles a triangular grid.

[0045] In some embodiments, the fibers are woven in a pattern where each tow passes over and under the others, creating a complex interlaced structure with fibers running at 60 degree angles to each other in three distinct planes. Such designs can provide high shear strength due to the multi-directional fiber orientation improving performance in twisting or torsional loads such as arrow firing. Such designs can provide improved impact resistance by the interwoven structure improved energy absorption / delivery compared with commercially available arrow weaves. Such designs can provide multi-directional strength in directions within the plane of the weave, not just along the warp and weft directions. Such improvements are unexpectedly successful, for example, in reducing dynamic spine dramatically over commercially available designs providing a difference in the nature of the design to such an extent to provide a new category or property of performance.

[0046] Within the present disclosure, devices, systems, and method here can improve arrow performance by keeping the arrow highly consistent during flight. Energy being delivered to the rear of the arrows shaft is quickly moved to the front of the shaft. This more efficient energy transfer from back to front can reduce energy losses due to flex of the arrows. Such energy conservation can deliver efficient energy on impact and / or less arrow drop in flight due to the reduced energy loss of the dynamic flexation of the arrows.

[0047] Within the present disclosure, carbon grades may include 24, 30, and 40 ton (tensile psi) rating, but in some embodiments may include any suitable rating. Arrows can generally take lengths within a range of about 18 to about 32 inches; may include inner diameter within a range of about 0.19 to about 0.22 inches; and / or may include wall thicknesses within a range of about 0.09 to about 0.12 inches. Suitable resins may include expoys which may be preimpregnated and / or applied, such as epoxies used in prepreg carbon fiber include high-toughness epoxy, thermoset epoxy, and thixotropic resins, for example, TR 350C150S, TR 350C175S, TR 350E100R, and TR 350E125S; those used in prepreg carbon fiber products for aerospace, defense, industrial, sports, and recreation, and automotive markets; epoxy-based thermoset resins such as G-series resins, 2510, 2511, 2700, 3900, and 3960; and / or epoxy matrix composites provide strength, durability, and environmental resistance; thixotropic resins that may act more like an adhesive than a resin, used to reinforce carbon fiber, fiberglass, and Kevlar used for crack filling and surface sealing on many substrate, used in automotive manufacturing for bonding hardware onto panels, other types of prepreg include carbon–bismaleimide, S-glass–epoxy, and aramid-epoxy.

[0048] While certain illustrative embodiments have been described in detail in the figures and the foregoing description, such an illustration and description is to be considered as exemplary and not restrictive in character, it being understood that only illustrative embodiments have been shown and described and that all changes and modifications that come within the spirit of the disclosure are desired to be protected. There are a plurality of advantages of the present disclosure arising from the various features of the methods, systems, and articles described herein. It will be noted that alternative embodiments of the methods, systems, and articles of the present disclosure may not include all of the features described yet still benefit from at least some of the advantages of such features. Those of ordinary skill in the art may readily devise their own implementations of the methods, systems, and articles that incorporate one or more of the features of the present disclosure.

Examples

Embodiment Construction

[0023]While the concepts of the present disclosure are susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that there is no intent to limit the concepts of the present disclosure to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives consistent with the present disclosure and the appended claims.

[0024]Materials and constructions of arrows for archery should account for the variety of performance considerations of their application. For example, bows, whether compound or traditional, can impart considerable force onto the arrow. Arrow spine can be an important consideration to arrow speed, accuracy, precision, and / or impact force. In the context of archery hunting, such efficiency can be particularly desirable to increase likelihood of hitting the tar...

CROSS-REFERENCE

[0001] This utility application claims the benefit of priority to U.S. Provisional Patent Application No. 63 / 764,703, entitled “ANGULAR WEAVE CARBON FIBER ARROW,” filed on February 28, 2025, the content of which is hereby incorporated by reference in its entirety.TECHNICAL FIELD

[0002] The present disclosure relates generally to arrows, and more specifically to devices, systems, and methods for arrows for archery.BACKGROUND

[0003] Arrow performance can be a challenging task to manage while providing reliable manufacturing for high quality products. Arrow spine can be important to consider in relation to manufacturing and quality control. Traditional constructions and / or materials for arrows may not address performance considerations in modern archery.SUMMARY

[0004] The present application discloses one or more of the features recited in the appended claims and / or the following features which, alone or in any combination, may comprise patentable subject matter.

[0005] According to an aspect of the present disclosure, an arrow assembly for archery may include a shaft body including a hollow circular cross-sectional profile extending for a length in a longitudinal direction, the circular cross-sectional profile defined by a carbon composite. The carbon composite may include a carbon fiber weave and a resin. The carbon fiber weave may include at least two sets of tows including a first set of tows and a second set of tows. The first set of tows may extend longitudinally to define the longitudinal length of the shaft body. The second set of tows may be woven together with the first set of tows with an angle of 30 degrees relative to the longitudinal direction. An arrow head may be coupled with the shaft body at one longitudinal end. An arrow nock may be coupled with the shaft body at another longitudinal end, opposite the one longitudinal end. The nock may be configured for engagement with a bow string of a bow for firing.

[0006] In some embodiments, the first set of tows may be arranged as warp tows. The second set of tows may be arranged as weft tows. The second set of tows may be woven together with the first set of tows with the angle of 30 degrees relative to the longitudinal direction such that the second set of tows wrap to at least partially spiral around a central axis of the shaft body.

[0007] In some embodiments, the carbon composite may include the carbon fiber weave at least partially impregnated with the resin. The resin may be cured. The shaft body may include a seam defined between two edges of the carbon fiber weave. The seam may be at least partially sealed by the resin. The arrow head may include a fixed-blade or mechanical broad head. The arrow head may be coupled with the shaft body via an insert engaged within the hollow of the circular cross-section of the shaft body at the one longitudinal end. In some embodiments, at least one of the first and second set of tows may include 1000 fibers per tow.

[0008] According to another aspect of the present disclosure, an arrow assembly for archery may include a shaft body including a hollow circular cross-sectional profile extending for a length in a longitudinal direction, the circular cross-sectional profile defined by a carbon composite. The carbon composite may include a carbon fiber weave and a resin, wherein the carbon fiber weave comprises at least two sets of tows including a first set of tows and a second set of tows. The first set of tows may extend longitudinally to define the longitudinal length of the shaft body. The second set of tows may be woven together with the first set of tows with an angle of 60 degrees relative to the longitudinal direction. An arrow head may be coupled with the shaft body at one longitudinal end. An arrow nock coupled with the shaft body at another longitudinal end, opposite the one longitudinal end. The nock may be configured for engagement with a bow string of a bow for firing.

[0009] In some embodiments, the first set of tows may be arranged as warp tows. The second set of tows may be arranged as weft tows. The second set of tows may be woven together with the first set of tows with the angle of 60 degrees relative to the longitudinal direction such that the second set of tows wrap to at least partially spiral around a central axis of the shaft body.

[0010] In some embodiments, the carbon fiber weave may include a third set of tows woven together with at least one of the first and second set of tows. The third set of tows may be woven together with at least one of the first and second set of tows at an angle of 90 degrees relative to the longitudinal direction.

[0011] In some embodiments, the carbon composite may include the carbon fiber weave at least partially impregnated with the resin. The resin may be cured. The shaft body may include a seam defined between two edges of the carbon fiber weave. The seam may be at least partially sealed by the resin. The arrow head may include a fixed-blade or mechanical broad head. The arrow head may be coupled with the shaft body via an insert engaged within the hollow of the circular cross-section of the shaft body at the one longitudinal end. At least one of the first and second set of tows may include 3000 fibers per tow.

[0012] According to another aspect of the present disclosure, an arrow shaft for an archery arrow may include a shaft body including a hollow circular cross-sectional profile extending for a length in a longitudinal direction, the circular cross-sectional profile defined by a carbon composite. The shaft body may be configured to couple with an arrow head at one longitudinal end and with an arrow nock at another longitudinal end, opposite the one longitudinal end. The carbon composite may include a carbon fiber weave and a resin. The carbon fiber weave may include at least two sets of tows including a first set of tows and a second set of tows. The first set of tows may extend longitudinally to define the longitudinal length of the shaft body. The second set of tows may be woven into the first set of tows with an angle relative to the longitudinal direction. The angle may be selected from the grouping consisting of 30 degrees and 60 degrees.

[0013] In some embodiments, the second set of tows may be woven into the first set of tows with an angle of 30 degrees relative to the longitudinal direction. At least one of the first and second set of tows may include 1000 fibers per tow. The second set of tows may be woven into the first set of tows with an angle of 60 degrees relative to the longitudinal direction. In some embodiments, at least one of the first and second set of tows include 3000 fibers per tow. The carbon fiber weave may include a third set of tows woven together with at least one of the first and second set of tows. In some embodiments, the third set of tows may be woven together with at least one of the first and second set of tows at an angle of 90 degrees relative to the longitudinal direction.

[0014] Additional features, which alone or in combination with any other feature(s), including those listed above and those listed in the claims, may comprise patentable subject matter and will become apparent to those skilled in the art upon consideration of the following detailed description of illustrative embodiments exemplifying the best mode of carrying out the invention as presently perceived.BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG. 1 is an elevation view of a compound bow having an arrow in a rest position in accordance with certain aspects of the present disclosure;

[0016] FIG. 2 is an elevation view of the compound bow of FIG. 1, showing various positions of the arrow in a drawn position, and in firing positions, in accordance with certain aspects of the present disclosure;

[0017] FIG. 3 is a partially exploded perspective view of an arrow assembly in accordance with certain aspects of the present disclosure;

[0018] FIG. 4 is a perspective view of a portion of the arrow assembly of FIG. 3 in accordance with certain aspects of the present disclosure;

[0019] FIG. 5 is an elevation view of a portion of the arrow assembly of FIGS. 3 and 4 in accordance with certain aspects of the present disclosure;

[0020] FIG. 6 is a partially exploded perspective view of an arrow assembly in accordance with certain other aspects of the present disclosure;

[0021] FIG. 7 is a perspective view of a portion of the arrow assembly of FIG. 6 in accordance with certain aspects of the present disclosure; and

[0022] FIG. 8 is an elevation view of a portion of the arrow assembly of FIGS. 6 and 7 in accordance with certain aspects of the present disclosure.DETAILED DESCRIPTION

[0023] While the concepts of the present disclosure are susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that there is no intent to limit the concepts of the present disclosure to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives consistent with the present disclosure and the appended claims.

[0024] Materials and constructions of arrows for archery should account for the variety of performance considerations of their application. For example, bows, whether compound or traditional, can impart considerable force onto the arrow. Arrow spine can be an important consideration to arrow speed, accuracy, precision, and / or impact force. In the context of archery hunting, such efficiency can be particularly desirable to increase likelihood of hitting the target, but also doing so with the desirable manner to support the overall desired goal.

[0025] Carbon fiber arrow construction can provide desirable performance with light weight. Arrow characteristics can include arrow static spine and arrow dynamic spine. Static spine is traditionally measured by supporting the arrow at two points, spaced apart by standard distance, hanging a standard weight at a midpoint, and measuring the amount of deflection (e.g., thousands of inch). This static spine characteristic can assist in understanding the nature of the arrow, for example, the stiffness imparted under static load.

[0026] Dynamic conditions can provide additional information on the nature of the arrow. Under typical firing, arrows undergo some initial bending or flexing as the rear of the arrow is propelled forward, for example, by a bow string. Referring to FIGS. 1 and 2, in FIG. 1, the arrow 10 is arranged engaged with the bowstring 14 that is supported by the bow riser 16 via limbs 18 in a rest state such that no appreciable loading exists on the arrow. In FIG. 2, the bowstring 14 is drawn into a drawn position with the arrow 10A (now shown in small dashed line) traveling backwards to maintain engagement between a nock of the arrow and the bowstring 14. Under initial release of the bowstring 14, the arrow is initially flexed as suggested in arrow 10B. Further, as the arrow is propelled forward, the initial flexing from firing causes oscillation flexing as suggested in arrow 10C. Although this flexing is illustrative depicted to be predominantly in a vertical plane (direction) in FIG. 2, this flexing can occur in any plane including horizontal. Additionally, it can be appreciated that such flexing may not exist solely as a single curvature having single maximum, but also as multiple curvature having multiple maxima on the same arrow.

[0027] As it can be appreciated, this oscillation flexing dissipates over time (and over distance) as the arrow flies as the dynamic dampened response of the arrow. Dynamic spine can describe the manner that the arrow reacts to the energy imposed by firing. Dynamic spine can be challenging to repeatedly measure and / or analyze, but for descriptive purpose is generally defined as the distance from firing at which the arrow flexing in flight reduces to nominal extent that the arrow is predominantly straight in flight. As a non-limiting and descriptive purpose, dynamic spline may be measured as the distance from the bow riser at which the arrow reaches flexing of less than 5% of maximum flexing in flight.

[0028] Commercially available arrows may have dynamic spine ranging from about 5 to about 10 yards from the bow riser. As discussed herein, devices, systems, and methods within the present disclosure can have dynamic spine within 1 yard from the riser, within 12 inches from the riser, and even particularly within about 5 to about 10 inches from the riser. According it can be appreciated that devices, systems, and methods within the present disclosure can provide improved arrow performance.

[0029] Within the present disclosure, orientation of tows in particular position to manage arrow flexing can dramatically improve dynamic characteristics such as dynamic spine. Aspects within the present disclosure can improve the performance specifically in the multidirectional environment experienced under firing of arrows, for example, forces generated other than directly along the longitudinal length of the arrow.

[0030] Referring now to FIG. 3, an arrow assembly 110 is shown in partially exploded view. Arrow assembly 110 is an exemplary embodiment just as arrow 10. The arrow assembly 110 illustratively includes an arrow shaft 112 having a body 113 extending to define a longitudinal length, illustratively in the vertical direction in the orientation of FIG. 3. On one end 114 of the shaft body 113, an arrow head 116 is configured to couple with the shaft body 113. In the illustrative embodiment, the arrow head 116 is embodied as a broad head that couples with the shaft body 113 via a coupler embodied as a shaft insert 118 having threaded receiver define therein to receive a threaded projection of the end of the arrow head 116. In some embodiments, any suitable manner of arrow head and / or coupling manner may be implemented, for example, fixed and / or mechanical broad heads, field points, and / or direct connection of arrow head to shaft.

[0031] On another end 120 of the shaft body 113, an arrow nock 122 is configured to couple with the shaft body 113. The arrow nock 122 is configured to engage with the bowstring for drawing and firing the arrow. The arrow nock 122 is illustratively embodied to couple with shaft body 113 by insertion within an interior of the body, but in some embodiments may couple by any suitable manner. As discussed in additional detail here, the shaft body 113 is illustratively formed from a carbon composite including a carbon fiber weave and resin.

[0032] Referring to FIG. 4, a portion of the shaft body 113 is shown for ease in viewing the carbon composite. The shaft body 113 illustratively includes a circular cross-section having a hollow interior 124. The carbon composite defines the shaft body 113 illustratively as a roll of a sheet of the carbon fiber at least partially impregnated with resin. The rolled sheet of carbon fiber illustratively defines a seam (not shown) extending longitudinally along the shaft body 113, illustratively comprising a small overlap of the edges of the carbon fiber joined together by resin, although in some embodiments, the edges of the carbon fiber may abut and not overlap.

[0033] In the illustratively embodiment as shown in FIGS. 4 and 5, the carbon fiber weave is shown including two sets of tows woven together. A tow is illustratively defined from a collective set of carbon fibers which extend generally parallel with each other to collectively define the tow as a continuous bundle of untwisted filaments making up a common ribbon. In the illustrative embodiment, each tow is formed from generally similar carbon fibers, but in some embodiments, different ratings of carbon fibers may be applied.

[0034] A first set of tows 126 illustratively extends longitudinally along the shaft body 113. A second set of tows 128 are woven together with the first set of tows 126 at an angle (θ) of 30 degrees. As can be appreciated, the angled arrangement of the second set of tows orients their longitudinal extent across the longitudinal direction of the shaft body 113. Accordingly the longitudinal extent of each of the second set of tows at least partially wrap around the axis of the shaft body 113 in a helical manner at the particular angle (θ) of 30 degrees. This orientation of the second set of tows at rest arranges each tow with particular orientation relative to the direction of flexing of the shaft body 113 that occurs under firing. The inventors of the present disclosure have discover that this critical angle (θ) of 30 degrees provides the unexpected results of enhanced dynamic spine. For example, as mentioned above, enhanced dynamic spine to within a range of about 5 to about 10 inches from bow riser improves considerably, to the extent to define a difference in kind, over commercially available designs. Additionally, angling the second set of tows at an angle of 30 degrees (and no less) relative to the longitudinal direction of the shaft body 113 avoided undesirable crimping during manufacturing as discussed in additional detail herein.

[0035] Referring now to FIGS. 6-8, another embodiment of an arrow assembly 210 is shown. Arrow assembly 210 is similar to arrow assembly 110 and the disclosure of arrow assembly 110 applies equally to the arrow assembly 210, except in instances of conflict with the specific disclosure of arrow assembly 210. In FIG. 6, The arrow assembly 210 illustratively includes an arrow shaft 212 having a body 213 extending to define a longitudinal length, illustratively in the vertical direction in the orientation of FIG. 6. On one end 214 of the shaft body 213, an arrow head 116 is configured to couple with the shaft body 213. In the illustrative embodiment, the arrow head 116 is embodied as the same manner of broad head that couples with the shaft body 113 of arrow assembly 110, via a coupler embodied as a shaft insert 218 having threaded receiver define therein to receive a threaded projection of the end of the arrow head 116, although in some embodiments an arrow head distinct from arrow head 116 may be applied. In some embodiments, any suitable manner of arrow head and / or coupling manner may be implemented, for example, fixed and / or mechanical broad heads, field points, and / or direct connection of arrow head to shaft.

[0036] On another end 220 of the shaft body 213, an arrow nock 122 (illustratively, but not required to be the same as with arrow assembly 110) is configured to couple with the shaft body 213. The arrow nock 122 is configured to engage with the bowstring for drawing and firing the arrow. The arrow nock 122 is illustratively embodied to couple with shaft body 213 by insertion within an interior of the body, but in some embodiments may couple by any suitable manner. A number of fletchings 115 can be affixed to the shaft body at different circumferential locations to guide movement through the air in flight. As discussed in additional detail here, the shaft body 213 is illustratively formed from a carbon composite including a carbon fiber weave and resin.

[0037] Referring to FIG. 7, a portion of the shaft body 213 is shown for ease in viewing the carbon composite. The shaft body 213 illustratively includes a circular cross-section having a hollow interior 224. The carbon composite defines the shaft body 213 illustratively as a roll of a sheet of the carbon fiber at least partially impregnated with resin. The rolled sheet of carbon fiber illustratively defines a seam (not shown) extending longitudinally along the shaft body 213, illustratively comprising a small overlap of the edges of the carbon fiber joined together by resin, although in some embodiments, the edges of the carbon fiber may abut and not overlap.

[0038] In the illustratively embodiment as shown in FIGS. 7 and 8, the carbon fiber weave is shown including three sets of tows woven together. A tow is illustratively defined from a collective set of carbon fibers which extend generally parallel with each other to collectively define the tow as a continuous bundle of untwisted filaments making up a common ribbon. In the illustrative embodiment, each tow is formed from generally similar carbon fibers, but in some embodiments, different ratings of carbon fibers may be applied.

[0039] A first set of tows 226 illustratively extends longitudinally along the shaft body 213. A second set of tows 228 are woven together with the first set of tows 226 at an angle (θ) of 60 degrees. In the illustrative embodiment, a third set of tows 229 is woven together with the first and second set of tows. The third set of tows 229 is illustratively woven such that their longitudinal extent is at an angle of 90 degrees relative to the longitudinal extent of the shaft body 213. As can be appreciated, the angled arrangement of the second set of tows 228 and the angled arrangement of the third set of tows 229 orients each of their longitudinal extent across the longitudinal direction of the shaft body 213. Accordingly the longitudinal extent of each of the second set of tows 228 and each of the third set of tows 229 at least partially wrap around the axis of the shaft body 113 in a helical manner at the particular angle (θ) of 30 degrees and in a circumferential manner at the particular angle of 90 degrees, respectively. This orientation of the second set of tows 228 and the third set of tows 229 at rest collectively arranges each tow with particular orientation relative to the direction of flexing of the shaft body 113 that occurs under firing. The inventors of the present disclosure have discover that this critical angle (θ) of 60 degrees provides the unexpected results of enhanced dynamic spine. Further, in combination with the third set of tows arranged at the particular 90 degree angle, for example, as mentioned above, enhanced dynamic spine to within a range of about 5 to about 10 inches from bow riser improves considerably, to the extent to define a difference in kind, over commercially available designs.

[0040] In manufacturing a shaft body within the present disclosure, a unit of loomed carbon fiber weave can be provided, for example, in a roll of woven sheet carbon fiber. The carbon fiber weave can be weaved on a loom to have the particular angle (θ) defined between the first set of tows which extend longitudinally along the sheet (or roll) and the second set of tows woven together with the first set of tows at the particular angle (θ).

[0041] The rolls of carbon fiber sheeting can be cut or diced into smaller sectional sheets of carbon fiber having a longitudinal length close to the maximum arrow length (e.g., 32 inches) and having a width generally defined as the circumference of the intended shaft body, including any allowance for shrinkage / growth and / or overlap of the edges upon assembly. The sectional sheets can be received onto a mandrel roller having an outer mandrel diameter equal to the desired inner diameter of the shaft body. The mandrel roller rolls the sectional sheet with high pressure to form the initial seam between lateral edges of the sectional sheet to define a cylindrical green part. The sectional sheets can be impregnated with resin and / or may be preimpregnated, and may be applied before and / or after rolling.

[0042] The gran cylindrical part can be heated, for example, within a curing oven to cure the resin into a cured shaft body. The cured shaft body can be refined by grinding an exterior surface to a desired outer diameter for consistent dimensioning. The final shaft body may be further cut to final length. Further assembly with nock and / or arrow head may be applied.

[0043] 1k (Centrifugal) Weave - Weaving carbon fiber at a 30-degree angle relative to the longitudinal sets of tows can include that the individual carbon fiber strands are laid down at a 30-degree angle relative to the primary direction of the fabric, creating a weave pattern with fibers oriented diagonally across the material, which can enhance the material's strength and stiffness in off-axis loading situations, like arrow firing performance, compared with 0 / 90 (or 45) degree weave. Within the present disclosure, improved multi-directional strength can be realized by introducing a 30 degree diagonally arranged fiber orientation in which the material gains unexpectedly high resistance to forces applied at angles other than directly along the fiber length (e.g., the arrow longitude). Such improvements are unexpectedly successful, for example, in reducing dynamic spine dramatically over commercially available designs providing a difference in the nature of the design to such an extent to provide a new category or property of performance.

[0044] 3k Weave - 60 degree carbon fiber weave can include the carbon fiber tows are oriented at a 60 degree angle relative to the longitudinal set of tows. Such weave can include a triaxial weave with a third set of tows arranged at 90 degrees relative to the longitudinal direction, creating a three-directional fabric which can exhibit superior strength and / or shear resistance compared to standard biaxial weaves. In addition to particularly arranged cross tows corresponding in critical manner to the arrow flexing in firing, fibers can run in three directions forming a network that resembles a triangular grid.

[0045] In some embodiments, the fibers are woven in a pattern where each tow passes over and under the others, creating a complex interlaced structure with fibers running at 60 degree angles to each other in three distinct planes. Such designs can provide high shear strength due to the multi-directional fiber orientation improving performance in twisting or torsional loads such as arrow firing. Such designs can provide improved impact resistance by the interwoven structure improved energy absorption / delivery compared with commercially available arrow weaves. Such designs can provide multi-directional strength in directions within the plane of the weave, not just along the warp and weft directions. Such improvements are unexpectedly successful, for example, in reducing dynamic spine dramatically over commercially available designs providing a difference in the nature of the design to such an extent to provide a new category or property of performance.

[0046] Within the present disclosure, devices, systems, and method here can improve arrow performance by keeping the arrow highly consistent during flight. Energy being delivered to the rear of the arrows shaft is quickly moved to the front of the shaft. This more efficient energy transfer from back to front can reduce energy losses due to flex of the arrows. Such energy conservation can deliver efficient energy on impact and / or less arrow drop in flight due to the reduced energy loss of the dynamic flexation of the arrows.

[0047] Within the present disclosure, carbon grades may include 24, 30, and 40 ton (tensile psi) rating, but in some embodiments may include any suitable rating. Arrows can generally take lengths within a range of about 18 to about 32 inches; may include inner diameter within a range of about 0.19 to about 0.22 inches; and / or may include wall thicknesses within a range of about 0.09 to about 0.12 inches. Suitable resins may include expoys which may be preimpregnated and / or applied, such as epoxies used in prepreg carbon fiber include high-toughness epoxy, thermoset epoxy, and thixotropic resins, for example, TR 350C150S, TR 350C175S, TR 350E100R, and TR 350E125S; those used in prepreg carbon fiber products for aerospace, defense, industrial, sports, and recreation, and automotive markets; epoxy-based thermoset resins such as G-series resins, 2510, 2511, 2700, 3900, and 3960; and / or epoxy matrix composites provide strength, durability, and environmental resistance; thixotropic resins that may act more like an adhesive than a resin, used to reinforce carbon fiber, fiberglass, and Kevlar used for crack filling and surface sealing on many substrate, used in automotive manufacturing for bonding hardware onto panels, other types of prepreg include carbon–bismaleimide, S-glass–epoxy, and aramid-epoxy.

[0048] While certain illustrative embodiments have been described in detail in the figures and the foregoing description, such an illustration and description is to be considered as exemplary and not restrictive in character, it being understood that only illustrative embodiments have been shown and described and that all changes and modifications that come within the spirit of the disclosure are desired to be protected. There are a plurality of advantages of the present disclosure arising from the various features of the methods, systems, and articles described herein. It will be noted that alternative embodiments of the methods, systems, and articles of the present disclosure may not include all of the features described yet still benefit from at least some of the advantages of such features. Those of ordinary skill in the art may readily devise their own implementations of the methods, systems, and articles that incorporate one or more of the features of the present disclosure.

Examples

Embodiment Construction

[0023]While the concepts of the present disclosure are susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that there is no intent to limit the concepts of the present disclosure to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives consistent with the present disclosure and the appended claims.

[0024]Materials and constructions of arrows for archery should account for the variety of performance considerations of their application. For example, bows, whether compound or traditional, can impart considerable force onto the arrow. Arrow spine can be an important consideration to arrow speed, accuracy, precision, and / or impact force. In the context of archery hunting, such efficiency can be particularly desirable to increase likelihood of hitting the tar...

Claims

1. An arrow assembly for archery, comprising:a shaft body including a hollow circular cross-sectional profile extending for a length in a longitudinal direction, the circular cross-sectional profile defined by a carbon composite,wherein the carbon composite comprises a carbon fiber weave and a resin, wherein the carbon fiber weave comprises at least two sets of tows including a first set of tows and a second set of tows,wherein the first set of tows extend longitudinally to define the longitudinal length of the shaft body, wherein the second set of tows are woven together with the first set of tows with an angle of 30 degrees relative to the longitudinal direction;an arrow head coupled with the shaft body at one longitudinal end; andan arrow nock coupled with the shaft body at another longitudinal end, opposite the one longitudinal end, the nock configured for engagement with a bow string of a bow for firing.

2. The arrow assembly of claim 1, wherein the first set of tows are arranged as warp tows.

3. The arrow assembly of claim 1, wherein the second set of tows are arranged as weft tows.

4. The arrow assembly of claim 1, wherein the second set of tows are woven together with the first set of tows with the angle of 30 degrees relative to the longitudinal direction such that the second set of tows wrap to at least partially spiral around a central axis of the shaft body.

5. The arrow assembly of claim 1, wherein the carbon composite comprises the carbon fiber weave at least partially impregnated with the resin.

6. The arrow assembly of claim 5, wherein the resin is cured.

7. The arrow assembly of claim 1, wherein the shaft body includes a seam defined between two edges of the carbon fiber weave.

8. The arrow assembly of claim 7, wherein the seam is at least partially sealed by the resin.

9. The arrow assembly of claim 1, wherein the arrow head includes a fixed-blade or mechanical broad head.

10. The arrow assembly of claim 9, wherein the arrow head is coupled with the shaft body via an insert engaged within the hollow of the circular cross-section of the shaft body at the one longitudinal end.

11. The arrow assembly of claim 1, wherein at least one of the first and second set of tows include 1000 fibers per tow.

12. An arrow assembly for archery, comprising:a shaft body including a hollow circular cross-sectional profile extending for a length in a longitudinal direction, the circular cross-sectional profile defined by a carbon composite,wherein the carbon composite comprises a carbon fiber weave and a resin, wherein the carbon fiber weave comprises at least two sets of tows including a first set of tows and a second set of tows,wherein the first set of tows extend longitudinally to define the longitudinal length of the shaft body, wherein the second set of tows are woven together with the first set of tows with an angle of 60 degrees relative to the longitudinal direction;an arrow head coupled with the shaft body at one longitudinal end; andan arrow nock coupled with the shaft body at another longitudinal end, opposite the one longitudinal end, the nock configured for engagement with a bow string of a bow for firing.

13. The arrow assembly of claim 12, wherein the first set of tows are arranged as warp tows.

14. The arrow assembly of claim 12, wherein the second set of tows are arranged as weft tows.

15. The arrow assembly of claim 12, wherein the second set of tows are woven together with the first set of tows with the angle of 60 degrees relative to the longitudinal direction such that the second set of tows wrap to at least partially spiral around a central axis of the shaft body.

16. The arrow assembly claim 15, wherein the carbon fiber weave includes a third set of tows woven together with at least one of the first and second set of tows.

17. The arrow assembly of claim 16, wherein the third set of tows are woven together with at least one of the first and second set of tows at an angle of 90 degrees relative to the longitudinal direction.

18. The arrow assembly of claim 12, wherein the carbon composite comprises the carbon fiber weave at least partially impregnated with the resin.

19. The arrow assembly of claim 18, wherein the resin is cured.

20. The arrow assembly of claim 12, wherein the shaft body includes a seam defined between two edges of the carbon fiber weave.

21. The arrow assembly of claim 20, wherein the seam is at least partially sealed by the resin.

22. The arrow assembly of claim 12, wherein the arrow head includes a fixed-blade or mechanical broad head.

23. The arrow assembly of claim 20, wherein the arrow head is coupled with the shaft body via an insert engaged within the hollow of the circular cross-section of the shaft body at the one longitudinal end.

24. The arrow assembly of claim 12, wherein at least one of the first and second set of tows include 3000 fibers per tow.

25. An arrow shaft for an archery arrow, comprising:a shaft body including a hollow circular cross-sectional profile extending for a length in a longitudinal direction, the circular cross-sectional profile defined by a carbon composite, the shaft body configured to couple with an arrow head at one longitudinal end and with an arrow nock at another longitudinal end, opposite the one longitudinal end,wherein the carbon composite comprises a carbon fiber weave and a resin, wherein the carbon fiber weave comprises at least two sets of tows including a first set of tows and a second set of tows,wherein the first set of tows extend longitudinally to define the longitudinal length of the shaft body, wherein the second set of tows are woven into the first set of tows with an angle relative to the longitudinal direction, wherein the angle is selected from the grouping consisting of 30 degrees and 60 degrees.

26. The arrow shaft of claim 25, wherein the second set of tows are woven into the first set of tows with an angle of 30 degrees relative to the longitudinal direction.

27. The arrow shaft of claim 26, wherein at least one of the first and second set of tows include 1000 fibers per tow.

28. The arrow shaft of claim 25, wherein the second set of tows are woven into the first set of tows with an angle of 60 degrees relative to the longitudinal direction.

29. The arrow shaft of claim 28, wherein at least one of the first and second set of tows include 3000 fibers per tow.

30. The arrow assembly claim 28, wherein the carbon fiber weave includes a third set of tows woven together with at least one of the first and second set of tows.

31. The arrow assembly of claim 30, wherein the third set of tows are woven together with at least one of the first and second set of tows at an angle of 90 degrees relative to the longitudinal direction.

Images