Patent Application
20170234660
This invention relates generally to projectiles. Specifically, it relates to an improved projectile for use in an air gun or bow.
The present technology relates generally to an apparatus and method for propelling a projectile from an air gun or a bow. When an elongate projectile is propelled from a barrel of an air gun, it suffers from poor interaction with the shaft of the barrel and also suffers from problems associated with stability while in flight. It is desirable to have an improved device and associated methods that solve those and other related problems.
The present technology also relates generally to an apparatus and method of attaching and aligning a removable arrow head to the shaft of an arrow. It is long known in the art to provide mechanical means for mounting removable arrowheads to the end of an arrow. However, when arrows hit a solid or semi-solid surface, current systems result in impact forces acting along the longitudinal length of the arrow shaft resulting in failure of the shaft itself. It is therefore desirable to have an improved way of mounting an arrowhead to the end of an arrow that minimizes breakage of the shaft.
To further clarify the above and other aspects of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The drawings are not drawn to scale. The invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:
The following detailed description of exemplary embodiments of the invention makes reference to the accompanying drawings, which form a part hereof and in which are shown, by way of illustration, exemplary embodiments in which the technology may be practiced. While these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, it should be understood that other embodiments may be realized and that various changes to the technology may be made without departing from the spirit and scope of the present invention. Thus, the following more detailed description of the embodiments of the present technology is not intended to limit the scope of the invention, as claimed, but is presented for purposes of illustration only and not limitation to describe the features and characteristics of the present technology, to set forth the best mode of operation of the technology, and to sufficiently enable one skilled in the art to practice the invention. Accordingly, the scope of the present invention is to be defined solely by the appended claims.
The following detailed description and exemplary embodiments of the invention will be best understood by reference to the accompanying drawings, wherein the elements and features of the invention are designated by numerals throughout.
The present technology in its various embodiments, some of which are depicted in the figures herein, can be broadly described as an improved projectile having a tip disposed about the end of a shaft and butt elements disposed about the rear end of the shaft. In one aspect, a stabilizer member is disposed apart from the butt element. However, in another aspect, the butt also comprises a stabilizer member. Broadly speaking, the technology resides in a shaft with a tip sized to be slightly larger than the diameter of a rifle bore so as to stop further downward movement of the elongate projectile shaft within the bore. A cylindrical butt is disposed about the rear end of the elongate projectile shaft having a front face that induces a predetermined amount of drag about the butt. A cylindrical stabilizer can be disposed forward of the butt and also has a front face that induces an amount of drag about the stabilizer. Advantageously, the enhanced drag about the front face of the butt/stabilizer functions to “center” the elongate projectile while in flight, increasing the ability of the elongate projectile to travel straight to its intended target. While an elongate air projectile for use in an air gun is specifically referenced herein, one of ordinary skill in the art will recognize that the technology can be used in connection with an arrow used in a traditional bow, compound bow, or other device that is capable of providing a force to the rear end of the projectile. The resulting projectile is more accurate over longer distances than traditional elongate projectiles (i.e., arrows and elongate projectiles) and is safer and quieter than conventional firearms. In addition, aspects of the projectile may be used as a stand-alone slug to be fired from an air-gun. For example, in one aspect of the technology, the butt may be used by itself as a bullet or slug in an air gun.
The projectile disclosed herein may be used in connection with an air gun. An air gun is any variety of projectile weapon that propels projectiles by means of compressed air or other gas, in contrast to firearms which use a propellant charge. Air guns are used for hunting, pest control, recreational shooting (commonly known as plinking), and competitive sports, such as the Olympic 10 m Air Rifle and 10 m Air Pistol events. In one aspect of the technology, the elongate projectile is used in connection with an air gun having a rifled bore. Rifling is the process of making helical grooves in the barrel of a gun or firearm, which imparts a spin to a projectile around its longitudinal axis. This spin serves to gyroscopically stabilize the projectile, improving its aerodynamic stability and accuracy. Rifling is often described by its twist rate, which indicates the distance the rifling takes to complete one full revolution, such as a one inch turn in ten inches (1:10 inches), or a 1 millimeter turn in 254 mm (1:254 mm). A shorter distance indicates a “faster” twist, meaning that for a given velocity the projectile will be rotating at a higher spin rate. The combination of length, weight and shape of a projectile determines the twist rate needed to stabilize it—barrels intended for short, large-diameter projectiles like spherical lead balls require a very low twist rate, such as 1 turn in 48 inches (122 cm). Barrels intended for long, small-diameter bullets, such as the ultra-low-drag, 80-grain 0.223 inch bullets (5.2 g, 5.56 mm), use twist rates of 1 turn in 8 inches (20 cm) or faster.
In some cases, rifling will have twist rates that increase down the length of the barrel, called a gain twist or progressive twist. Long projectiles, such as the elongate projectiles described herein, are thought to require high twist rates and are recommended to be fired from a smoothbore barrel. Aspects of the technology described herein cure that deficiency.
Projectile shafts, including arrows, have various sizes and fletchings or vanes of different designs. These vanes are for the purpose of better stabilization to start the arrow or elongate projectile shaft spinning. Spinning the arrow shaft is important for shaft stabilization for a number of reasons. The present technology introduces additional elements for shaft stabilization. When a standard arrow shaft is released from a bow, the arrow shaft bends around the bow staff. This is due to the arrow being forced from a standstill to full speed very quickly. This bending back and forth creates drag and decreases arrow speed. The presence of vanes and fletchings, while intended to assist in shaft spinning, also creates drag and decreases arrow speed. While shooting an arrow or an elongate projectile with fletchings or vanes in an environment with cross-winds, accuracy of the projectile is severely hampered. This is not to say that fletchings may not be used in the current invention. Rather, in certain aspects, fletchings are not used.
With specific reference now to the figures,
The front opening 24 of the tip 20 has a diameter smaller than the shaft 10 to provide for a “seat” for the distal end of the shaft 10. In yet another aspect, the tip 20 comprises a plurality of three blades or points disposed about the exterior of the front end 21 of the tip 20. The front end 21 may be sized to fit within the bore of the rifle with the three blades or points acting to center the shaft 10 within the bore.
In one aspect of the technology, the tip 20 is removably secured to the shaft 10 so that a variety of different tips may be used on the same shaft 10. For example, the tip 20 may be replaced with a broad-head tip for hunting purposes, flat faced tips for target practice, or other tips used for other purposes. The tip 20 may be threaded onto the shaft 10, press-fit, or permanently secured by glue or some other method known in the art. In one aspect of the technology, the tip 20 is made of a dense, heavy material such as brass. The tip 20 is designed to be heavier than the remainder of the shaft 10, the stabilizer 50, and the butt 30. In this manner, the center of gravity of the elongate projectile 5 is balanced forward of the center 11 of the elongate projectile 5 which results in increased stabilization of the projectile 5 during travel through the air. While reference is made to a machined tip, it is understood that the tip 20 may be cast, molded or manufactured in a number of methods known in the art.
In one aspect of the technology, the butt 30 comprises a rigid cylinder having an annular groove (or channel) 31 disposed near the front end of the cylinder and circumscribing the cylinder. The semi-rigid cylinder has an outer diameter that is sized slightly smaller than the inner diameter of the bore of a rifle. In one aspect, the rear end of the butt 30 is tapered to assist in the placement of the projectile 5 into the bore of the rifle. The annular groove 31 is sized to receive one or more resilient O-rings 60 therein with the O-rings 60 circumscribing the annular groove 31. When placed within the annular groove 31, the outer diameter of the O-ring 60 is sized slightly larger than the inner diameter of the rifle bore. In this manner, the O-ring 60 acts to seal the rifle bore to enable pressurized air from an air rifle to deliver a propulsive force to the elongate projectile 5. The O-ring 60 also engages the riflings within the bore. As the elongate projectile 5 is propelled down the bore of the rifle, the riflings cause the elongate projectile 5 to rotate within the shaft 10. The spinning or rotation of the elongate projectile 5 within the bore increases the stabilization of the elongate projectile 5 while in flight. The lack of fletchings or vanes that are traditionally used to achieve spinning, results in a more stable flight path in any type of cross-wind. In other words, the flight path of arrows or elongate projectiles that have traditionally relied on fletchings or vanes to spin while in flight are negatively affected by a cross wind catching on the fletchings or vanes. The present technology eliminates that concern allowing the projectile 5 to fly straighter and longer distances.
With reference to
In accordance with one aspect of the technology, the O-ring is made of a resilient material such as rubber, nitrile, or polymeric materials. The butt 30 is made from an acetal resin such as Delrin® though it may be made from any suitable material, including, but without limitation, polymers, plastics, alloys and the like. The butt 30 may be molded, extruded, machined, or formed by any suitable method known in the art. The annular groove 31 is placed in the forward half of the cylindrical butt 30. The side surfaces 37 of the butt 30 act as a bearing surface to facilitate travel down the bore of the rifle as the elongate projectile 5.
In accordance with one aspect of the technology, the front face 34 of the butt 30 is substantially perpendicular to a longitudinal axis of the elongate projectile shaft 10. Drag (sometimes called air resistance or air friction) refers to the force acting opposite to the relative motion of any object moving with respect to a surrounding fluid. This can exist between two fluid layers (or surfaces) or a fluid and a solid surface. In the instant application, the interaction between the air and the elongate projectile 5 as the elongate projectile 5 moves in its flight path and the front face 34 of the butt 30 creates drag or frictional forces that act about the outer edge 35 of the front face 34 of the butt 30. While the drag has the negative effect of reducing the speed of the elongate projectile 5, the frictional forces are distributed evenly about the outer edge 35 of the front face 34 and act to stabilize the flight path of the elongate projectile 5.
In accordance with one aspect of the technology, the front face 34 of the butt 30 may be tapered. For example, the front face 34 may be linearly tapered outward at a forty-five degree angle. The tapering of the front face 34 decreases the drag on the butt 30 thereby increasing the speed of the elongate projectile 5, but decreasing the stabilization of the elongate projectile 5 while in flight. While a forty-five degree angle is specifically referenced, the angle of the taper may vary as suits a particular application, particularly with respect to the balancing between increased stability versus increased drag. For example, the front face 34 may vary from ninety degrees (not tapered) to twenty-five degrees (significantly tapered) with a preferred tapering of forty-five degrees. In another aspect, the front face 34 may taper outwardly in a non-linear fashion forming a curved outer surface. The front face 34 may also be linearly tapered inward (or non-linearly, i.e., concave) to increase the amount of drag on the elongate projectile 5 while in flight. The increase in drag increases the stability of the flight path of the elongate projectile 5 at the expense of reduced speed of the projectile 5. The rear end of the butt 30 has a slight taper to facilitate placement of the butt 30 within the bore of a rifle. The inner diameter of the butt 30 is sized to receive an end of the shaft 10 therein. The butt 30 is secured to the shaft 10 permanently (e.g., glued, fused, etc.) or can be removably secured to replace the butt 30 if it becomes worn over time or if the user wishes to use the elongate projectile 5 in a different application (e.g., as a nocked arrow). In accordance with one aspect, the butt 30 is formed from the same material as the shaft 10 and is integrally formed with the shaft 10 rather than being separately manufactured and later coupled to the shaft 10.
A stabilizer 50 is disposed along the shaft 10 of the elongate projectile 5. In one aspect of the technology, the stabilizer 50 is cylindrically shaped with an annular groove 51 disposed therein. The annular groove 51 functions similar to the groove 31 located within the butt 30. That is, it houses an O-ring intended to engage with the riflings of the bore of a rifle. The engagement of the O-rings with the riflings causes the shaft 10 to rotate or spin within the bore. The resulting spinning action increases the elongate projectile 5 stability during flight. Side surfaces 52 of the stabilizer 50 act as bearing surfaces to facilitate travel of the shaft 10 down the bore of the rifle and create the ultimate flight path of the elongate projectile 5. In one aspect of the technology, the stabilizer 50 is spaced a distance of at least five times the diameter of the bore from the butt 30. In other words, if the bore of a rifle intended to propel the elongate projectile 5 has an inner diameter of 0.50 inches, the distance between the front face 34 of the butt 30 and the rear face 53 of the stabilizer 50 is 2.5 inches. The stabilizer 50 may be placed a distance beyond five times the diameter of the bore away from the butt 30 depending on the size of the bore and the relative weight of the elongate projectile 5. For elongate projectiles 5 that are relatively heavy, with a tip 20 that is light (based on a desired use of the tip 20) the stabilizer 50 may be placed nearer the center 11 of the shaft 10 in an effort to balance the elongate projectile 5 to maximize projectile stability. In one aspect of the technology, the annular groove 51 is disposed in the front half of the stabilizer 50. However, in other aspects, the annular groove 51 is disposed in the middle of the stabilizer 50 or towards the rear end of the stabilizer 50.
As with the butt 30, the front face 54 of the stabilizer 50 is substantially perpendicular to a longitudinal axis of the shaft 10 of elongate projectile 5. Similar to the drag created on the front face 34 of the butt 30, as the elongate projectile 5 travels through the air, frictional forces from the air act equally about the outer edge 55 of the front face 54 creating a stabilizing force on the elongate projectile 5 in flight. In one aspect of the technology, the front face 54 may be tapered outward to reduce the drag about the front face 54. In another aspect, the front face 54 may be tapered inward or concave to increase the drag on the front face 54.
While specific reference is made herein to a cylindrical front face 54, it is understood that the front face 54 of the stabilizer 50 (as well as the front face 34 of the butt 30) may have designs placed thereon to optimize the ratio between drag and projectile speed. For example, the front face 54 may not be perfectly planar. Rather, it may have protrusions, indentations, or other designs associated therewith. In addition, other modifications may be made to optimize projectile spin as suits a particular application. For example, one or both of the tip 20 and the stabilizer 50 may be equipped with grooves disposed at an angle to the longitudinal axis of the elongate projectile 5 to induce spinning when the elongate projectile 5 is launched from a smooth bore barrel, cross-bow, or other apparatus that lacks riflings. In certain aspects of the technology, the butt 30 is configured to act as the stabilizer 50. This may be in addition to a stabilizer 50 disposed elsewhere about the shaft 10, and may include fletchings that act as conventional stabilizers. It may also include aspects without any additional stabilization means.
With reference now generally to
In accordance with one aspect of the technology, the annular groove 110 comprises a tapered front section 111 and a tapered rear section 112. While a tapered front section 111 and rear section 112 are both shown, it is understood that the butt 110 could comprise a tapered front section 111 or a tapered rear section 112 or both as suits a particular purpose. In accordance with one aspect where an O-ring (or other resilient member) is disposed within the annular groove 110, when the projectile (either in connection with an arrow or as a stand-alone slug) is propagated from an air-rifle, the air pressure from the air-rifle used to propel the projectile out of the air gun drives the O-ring forward over the tapered front section 111. Because the tapered front section 111 has an increasing outer diameter, as the O-ring is driven forward over the tapered front section 111, the O-ring expands. As the O-ring expands its outer diameter is increased and it engages the side walls of the internal bore of the air rifle. As the O-ring engages the internal bore of the air rifle, frictional forces created by the engagement drive the O-ring towards a rear section of the annular groove 110. It is believed that the pressure gradient from the pressurized air acting on the O-ring decreases as the projectile travels down the bore of the air rifle. Accordingly, it is believed that during its initial movement down the bore of the air rifle, the O-ring is driven forward and, due to its expansion over the front tapered section 111, engages the internal bore of the air gun. However, as the pressure gradient decreases during the initial movement down the bore, the frictional forces acting on the O-ring, driving the O-ring backward will be greater than the air pressure driving O-ring forward. As that happens, the O-ring will be driven backward and return to its biased (or non-expanded) state within the non-tapered portion of the annular groove 110. In one aspect, a frictional force continues to act on the O-ring as the projectile travels down the bore of the air rifle causing the O-ring to continue to move backward and over the rear tapered section 112. While in its biased state, the O-ring engages the sidewall of the internal bore, however, in one aspect, the engagement is not enough to create satisfactory “spinning” of the projectile. As the O-ring is propelled or driven backward over the rear tapered section 112, it expands and engages the internal bore to a greater degree creating a greater seal or greater engagement resulting in increased “spinning” of the projectile. It is believed that the degree to which the O-ring is advanced over the front tapered section 111 and its movement rearward as the projectile travels down the bore of the air gun is a function primarily of the sizing of the O-ring with respect to the internal bore of the air gun and the diameter of the annular groove 110, and the amount of pressure acting on the projectile from pressurized air. The system seeks equilibrium between the air pressure driving the O-ring forward, the frictional forces resulting from engagement of the O-ring with the internal bore of the air gun, and the O-ring's tendency to return to its biased state in the non-tapered section of the annular groove 110. Advantageously, the present technology takes advantage of all three forces to optimize engagement of the O-ring with the riflings of the bore of the air gun.
While reference is made to a single O-ring on butt 100, it is understood that one or more O-rings (or other resilient members) may be disposed in a single annular groove 110. In one aspect, it is believed that as a first O-ring is driven backward over the rear tapered section 112, a second O-ring, abutted against the first O-ring, is also driven backward pushing the first O-ring further over the rear tapered section 112 resulting in an increased engagement against the internal bore of the air gun. The foregoing examples include use of the butt 100 on an arrow as shown in
With reference to
One or more stabilizers 350 are disposed along the shaft 310 of the elongate projectile 305. In one aspect of the technology, the stabilizer 350 is cylindrically shaped with an annular groove 351 disposed therein. The annular groove 351 functions similar to the groove 331 located within the butt 330. That is, it can house an O-ring intended to engage with the riflings of the bore of a rifle, though use of an O-ring in the stabilizer 351 is not always necessary. In one aspect of the technology, the engagement of the O-rings with the riflings causes the shaft 310 to rotate or spin within the bore. The resulting spinning action increases the elongate projectile 305 stability during flight. Side surfaces 352 of the stabilizer 350 act as bearing surfaces to facilitate travel of the shaft 310 down the bore of the rifle and create the ultimate flight path of the elongate projectile 305. In one aspect of the technology, a single stabilizer 350 is spaced a distance of at least five times the diameter of the bore from the butt 330. In other words, if the bore of a rifle intended to propel the elongate projectile 305 has an inner diameter of 0.50 inches, the distance between the front face 334 of the butt 330 and the rear face 353 of the stabilizer 350 is 2.5 inches. The stabilizer 350 may be placed a distance beyond five times the diameter of the bore away from the butt 330 depending on the size of the bore and the relative weight of the elongate projectile 305. For elongate projectiles 305 that are relatively heavy, with a tip 320 that is light (based on a desired use of the tip 320) the stabilizer 350 may be placed nearer the center 311 of the shaft 310 in an effort to balance the elongate projectile 305 to maximize projectile stability. In one aspect of the technology, the annular groove 351 is disposed in the front half of the stabilizer 350. However, in other aspects, the annular groove 351 is disposed in the middle of the stabilizer 350 or towards the rear end of the stabilizer 350. While a single stabilizer 350 is referenced, multiple stabilizers 350 may be used as needed to balance the shaft 310 in its flight path. The distribution of multiple stabilizers 350 about the shaft 310 of projectile 305 will depend on the overall weight of the projectile 305 and the weight of the tip 320. It will also be a function of the size of the projectile 305.
As with the butt 330, the front face 354 of the stabilizer 350 is substantially perpendicular to a longitudinal axis of the shaft 310 of elongate projectile 35. Similar to the drag created on the front face 334 of the butt 330, as the elongate projectile 305 travels through the air, frictional forces from the air act equally about the outer edge 355 of the front face 354 creating a stabilizing force on the elongate projectile 305 in flight. In one aspect of the technology, the front face 354 may be tapered outward to reduce the drag about the front face 354. In another aspect, the front face 354 may be tapered inward or concave to increase the drag on the front face 354.
With reference to
In accordance with one aspect of the technology, the butt 330 comprises a second annular groove 380 having a front end 381 that slopes downward to a back end 382. That is, the slope of the first annular groove 331 and the second annular groove 380 are in opposite directions. The second annular groove 380 comprises an O-ring 390 that also rides on groove and moves between the front end 381 and back end 382 of the butt 330 in positions 390a and 390b, respectively. However, the O-ring 390 serves a different function than O-ring 360. When the projectile 305 is propelled from the bore of a gun, the pressure from the discharge of the gun propels the projectile from the gun but also has a tendency to push the O-ring 360 forward which decreases its engagement with the inner sidewall of the bore of the gun. O-ring 390 is placed behind O-ring 360 and functions to minimize this effect by moving from a first position 390b when the butt 330 is in a stationary position and inserted within the bore of the gun, to a second position 390a, when a volume of pressurized air is released from the gun into the bore to propel the projectile 305 out of the gun. In this manner, the pressurized air that is propelling the projectile 305 also moves the O-ring 390 forward on annular groove 300. As it moves from the back end 382 to the front end 381 in increases in diameter and, if the pressure is sufficient, engages the internal sidewall of the bore of the gun. This improves the sealing and propulsive effect of the pressurized air and also, in the case of a rifled bore, rotates the projectile as it is advanced through the bore of the gun. The O-ring 390 is biased in its first position 390b. Thus, when the pressure within the bore has decreased to a level that does not drive the O-ring 390 into its second position 390a, the O-ring 390 will have a tendency to retreat to its first position 390b both from the natural bias of the O-ring, and the friction encountered at the inner sidewall of the bore of the gun. This occurs in a balanced manner so that as the pressure decreases within the bore, the O-ring 390 will likewise move backwards at a similar rate taking into account the frictional forces acting on the O-ring 390 when it engages the sidewall of the bore. Advantageously, the O-ring 390 minimizes interference that the pressurized air from the gun may have on the O-ring's 360 ability to engage the sidewall of bore.
While the figures show that the opposing slopes have an identical slope, it is understood that the slopes of the respective grooves may be different. In one aspect one or either of the grooves may have no slope at all. In one aspect, the first and second grooves may have differing diameters to accommodate the different functions of the respective annular grooves. Likewise, the respective O-rings may be sized differently. That is, in one aspect, the diameter of the first groove 331 is larger than the diameter of the second groove 380. In another aspect, the diameter of the first groove is smaller than the diameter of the second groove 380. In one aspect, the slope of the first groove 331 is greater than the slope of the second groove 380 and vice versa. Moreover, the O-ring 360 may be larger (in diameter, thickness, etc.) than O-ring 390 and vice versa. In yet another aspect, the length of the first groove 331 is greater than the length of the second groove 380 and vice versa.
The present technology also describes systems, devices, and methods for mounting an arrowhead tip to the shaft of an arrow. Previous practices fall short of providing optimal mounting devices due, in part, to localized forces acting on the tip of the shaft resulting in failure of the shaft wall. Generally speaking, in one aspect of the technology, an insert and outsert are provided for placement about the distal end of an arrow shaft. Advantageously, placement of the insert and outsert about the distal end of the arrow shaft results in an increase in the strength of the distal end of the shaft and a distribution of forces about the longitudinal length of the shaft. In one aspect, the outsert holds the shaft of the arrow in compression increasing the hoop strength of the shaft.
With reference now to
In accordance with one aspect of the technology, an outsert 415 is provided in the general shape of a trapezoid. The outsert 415 also comprises a rigid material, including, but without limitation, aluminum, steel, or other metal or metal alloy, polyurethane, or other rigid synthetic material and may be molded, extruded, machined, or manufactured in accordance with other known methods. The outsert 415 comprises a head 416 having an outer diameter 417 tapering to a tail 418 having a diameter smaller than the diameter of the head 416. The head 416 is beveled to accommodate placement of an arrowhead thereon. A lumen 425 extends through the outsert 415 and is sized to receive the shaft of an arrowhead therein, the shaft passing through the lumen 425 and being received into the aperture 413 disposed within the insert 405. The lumen 425 within the outsert 415 is divided into two sections each having a different inner diameter. A first inner diameter 419 is located about the distal end or tail 418 of the outsert 415. The inner diameter 419 located near the distal end or tail 418 of the outsert 415 is sized to approximate the outer diameter of the arrow shaft and outer diameter of the cylindrical head 411 on the insert 405. The second diameter 420 is located near the proximal end or head of the outsert and is smaller than the first diameter 419. The second diameter 420 is sized to receive a portion of the shaft of an arrowhead therein. In one aspect, the first diameter 419 and second diameter 420 each occupy about half of the length of the outsert 415. However, those lengths may be modified as suits a particular purpose. For example, the length of the first diameter 418 may be up to ¾ of the total length of the outsert 415 or it may be as little as ¼ of the total length of the outsert 415.
With reference to
In accordance with one aspect of the technology, the distal end of the insert 405 comprises a plurality of grooves or apertures. The grooves or apertures are intended to create additional space (i.e., a bonding area) for a bonding agent to adhere to an outer surface of the insert 405 and an inner surface of the arrow shaft 430. Without grooves or apertures, the insert 405 may be lengthened further to increase the bonding area available for the technology.
In another aspect of the technology, the outsert 415 is configured to act as a guide for centering the arrow within the barrel 440 of a firearm. The outer diameter of the outsert 415 at the largest diameter of the head 416 is sized larger than the internal diameter 441 of the barrel 440 of the firearm. Placed within the end of the barrel 440 of the firearm, the head 416 of the outsert 415 centers the outsert 415 within the barrel 440. While
While the foregoing examples are illustrative of the principles of the present invention in one or more particular applications, it will be apparent to those of ordinary skill in the art that numerous modifications in form, usage and details of implementation can be made without the exercise of inventive faculty, and without departing from the principles and concepts of the invention. Moreover, one or more aspects of the technology may be combined together or removed without departing from the scope of the invention and principles of operation disclosed herein. Accordingly, it is not intended that the invention be limited, except as by the claims set forth below.
This application claims priority to U.S. Provisional Patent Application No. 62/272,893 filed on Dec. 30, 2015 and U.S. Provisional Patent Application No. 62/297,646 filed on Feb. 19, 2016, both entitled “Mounting Assembly for Arrow Head” and is a continuation-in-part of U.S. patent application Ser. No. 15/094,629 filed on Apr. 8, 2016 entitled “Air Driven Projectile” and is a continuation-in-part of U.S. patent application Ser. No. 14/751,895 filed on Jun. 26, 2015 entitled “Projectile” all of which are incorporated herein by reference in their entireties.
| Number | Date | Country | |
|---|---|---|---|
| 62297646 | Feb 2016 | US | |
| 62272893 | Dec 2015 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 15094629 | Apr 2016 | US |
| Child | 15393603 | US | |
| Parent | 14751895 | Jun 2015 | US |
| Child | 15094629 | US |
