PROJECTILE SYSTEM
20250257986 ยท 2025-08-14
Inventors
Cpc classification
F42B5/24
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F42B14/02
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
International classification
F42B14/02
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F42B12/82
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Abstract
A projectile system is described, the projectile system includes a projectile body, the projectile body including a front end portion that tapers to a point at the front end and the front end portion of the projectile body is dimensionally smaller than a bore of a firearm system, the projectile body including a driving band portion behind the front end portion of the projectile body, the driving band the driving band portion being dimensionally equal to a caliber of the firearm system and dimensionally greater than a bore diameter of the firearm system, such that the driving band portion comes into contact with the bore of the firearm system when the projectile passes through the bore of the firearm system.
Claims
1. A projectile system comprising: a projectile body, the projectile body including a front end portion that tapers to a point at the front end and the front end portion of the projectile body is dimensionally smaller than a bore of a firearm system, the projectile body including a driving band portion behind the front end portion of the projectile body, the driving band portion being dimensionally equal to a caliber of the firearm system and dimensionally greater than a bore diameter of the firearm system, such that the driving band portion comes into contact with the bore of the firearm system when the projectile passes through the bore of the firearm system, the projectile body including an end portion behind the driving band portion; and a boot configured to wrap around the end portion of the projectile body and provide an additional seal when the projectile passes through the bore of the firearm system.
2. The projectile system of claim 1, wherein the front end portion of the projectile body further includes a plurality of flutes configured to center the projectile body within the bore of the firearm system when the projectile body is positioned into the firearm system.
3. The projectile system of claim 2, wherein the plurality of flutes includes at least four flutes.
4. The projectile system of claim 2, wherein the plurality of flutes includes at least five flutes.
5. The projectile system of claim 2, wherein the plurality of flutes includes six flutes.
6. The projectile system of claim 1, wherein the projectile body includes one or more grooves formed into an exterior surface of the projectile body.
7. The projectile system of claim 6, wherein one or more grooves are configured to retain one or more latex bands, wherein each latex band of the one or more latex bands wrap around the projectile body and are seated within different grooves of the one or more grooves.
8. The projectile system of claim 6, wherein the one or more grooves include a lubricant, such that when the projectile is moving down the bore, the lubricant coats the bore.
9. The projectile system of claim 8, wherein the one or more grooves are positioned on the projectile body ahead of the driving band portion and the lubricant coats the bore ahead of the driving band portion as the projectile is moving down the bore.
10. The projectile system of claim 1, wherein the driving band portion is segmented and one or more grooves are within the driving band portion of the projectile band.
11. The projectile system of claim 1, wherein the boot is configured to disengage from the projectile body as the projectile moves down and exits the bore.
12. The projectile system of claim 11, wherein the boot cleans a surface of the bore as the projectile moves down and exits the bore.
13. The projectile system of claim 1, wherein the wherein the projectile body further includes a plurality of flutes configured to center the projectile body within the bore of the firearm system and wherein a quantity of flutes in the plurality of flutes matches with a rifling pattern within the bore of the firearm system.
14. The projectile system of claim 13, wherein the plurality of flutes are in vectored positions to may impart a rotation that matches the rotation generated by rifling pattern within the bore of the firearm system.
15. The projectile system of claim 14, wherein the plurality of flutes impart aerodynamic spin to the projectile body when the projectile body is fired from the bore.
16. The projectile system of claim 1, wherein driving band portion of the projectile body is dimensionally wider than the other portions of the projectile body and the driving band portion is configured to make frictional contact with an interior of the bore when fired.
17. The projectile system of claim 16, wherein the driving band portion has a reduced bearing surface when only the driving band portion engages with the bore.
18. The projectile system of claim 17, wherein the driving band portion is able to maintain a high engraving efficiency.
19. A projectile system comprising: a projectile body, the projectile body being cylindrically shaped and including a front end portion that tapers to a point at the front end and the front end portion of the projectile body is dimensionally smaller than a cylindrical bore of a firearm system, the projectile body further including a driving band portion behind the front end portion of the projectile body, the driving band portion being dimensionally equal to a caliber of the firearm system and dimensionally greater than a bore diameter of the firearm system, such that the driving band portion comes into contact with the cylindrical bore of the firearm system when the projectile passes through the bore of the firearm system, the projectile body including an end portion behind the driving band portion; and a plurality of flutes positioned on an exterior surface of the projectile body ahead of the driving band portion of the projectile body, the plurality of flutes being configured to center the projectile body within the bore of the firearm system when the projectile body is positioned into the firearm system.
20. The projectile system of claim 19, further comprising: a boot configured to wrap around the end portion of the projectile body and provide an additional seal when the projectile passes through the bore of the firearm system.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The disclosure is illustrated by way of example, and not by way of limitation in the figures of the accompanying drawings in which like reference numerals are used to refer to similar elements.
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[0028] projectile.
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DETAILED DESCRIPTION
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[0038] As shown in
[0039]
[0040] In some implementations, the driving band 110 includes the boot 106 and acts as the end cap which ensures a positive seal in the cartridge 102. The boot 106 can be formed out of a plastic or other suitable material to provide the positive seal with the driving band 110 and the bore of the barrel and as the projectile 104 moves down the barrel, the boot 106 can be configured to dissipate and/or release from the projectile 104 (.e.g., disengage) as it wears down due to the friction as the projectile 104 moves down and exits out of the bore of the barrel. In some implementations, the projectile may include a plurality of flutes 108 that extend out of the body of the projectile 104 and are configured to retain the projectile 104 in a centered position inside of the bore of the barrel when the projectile 104 is chambered into the bore. In some implementations, the flutes 108 can be angled to match the rifling of the barrel and may include as many flutes 108 as there are barrel rifling. In some implementations, the vectored positions of the flutes 108 may impart a rotation that matches and/or compliments the rotation generated by the driving band 110 and rifling pattern (e.g., the number and/or twist pattern of the rifling grooves in the bore). In some implementations, the flutes 108 may further impart aerodynamic spin to the projectile 104 as well as it is fired from a firearm system. In some implementations, a small plastic piece (or other suitable material) could be positioned on the projectile 104 in place of the flutes 108 to keep the projectile 104 centralized within the bore when chambered and then once the projectile 104 is fired, the small plastic piece could separate once the projectile 104 transited the barrel. In some implementations, a front edge of the flutes 108 can be tapered in order to transit a feed ramp of a rifle barrel in some firearm system.
[0041] In some implementations, as the boot 106 moves down the bore of the barrel as the projectile 104 is fired, the boot 106 also cleans out a significant portion of any fowling in the barrel from the previous rounds. This self-cleaning action using the boot 106 allows the firearm system to operate more efficiently, with increased accuracy for fouling up shots and greater periods of time as compared to conventional projectiles for when shooting has to be halted in order to clean or change out the barrels. In some implementations, different types of plastics or other suitable materials have been used to achieve different results in the self-cleaning action as the boot 106 moves down the barrel.
[0042] In some implementations, the projectile may include one or more grooves 112 or segments that can be formed into the exterior surface of the projectile 104. As shown in
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[0044] As shown in
[0045] In some implementations, the projectile 104 performs differently as compared to conventional bullets in cartridges. Typically, the heavier a projectile that is propelled through a barrel is, the less powder load is used in the cartridge to propel it. This essentially means that lighter projectiles (e.g., bullets) get more powder load behind them and the performance results is that lighter projectiles are faster as compared to heavier projectiles. Furthermore, if a lighter bullet powder load is combined with a heavier bullet, an unsafe condition is created. One of the results of this unsafe condition is that it creates over pressure conditions where the projectile is chambered. This back pressure results because of the greater resistance of the heavier bullet moving down the barrel and the resulting back pressure on the cartridge and the primer can cause damage to the brass and primer. These over pressure conditions are well understood by cartridge loaders and are avoided by carefully measuring the powder load combinations with various projectile weights and ensuring that a powder load is not too high for a bullet weight. However, the projectile 104 shown in
[0046] In conventional firearm systems, after a few bullets have been fired through a firearm barrel, the barrel becomes warm/hot due to the friction between the bore of the barrel and the bullets as they are fired. This effect of heating the barrel can become significant and affect accuracy and/or other performance on the firearm system. Some firearm systems have attempted to address this problem by using special barrel liners, thicker barrel walls, and/or regularly switching out barrels. However, by using a firearm system 100 that employs the projectile 104 with it's decreased friction down the bore of the barrel, there was minimal detected heat build-up during firing. This reduced friction from the projectile 104 can provide a significant improvement to accuracy and/or barrel life by reducing heat buildup in the bore. This can allow for better performance of a firearm system and extended life of the system. For example, if this bullet system 100 were employed in a machine gun that relies on barrels being switched out as it is operated, this bullet system 100 would allow for a significantly larger number of rounds to be fired down the barrel before any heat build up issues would need to be addressed.
[0047] As shown in
[0048] One result of using a projectile 104 with a lower friction in the bore of the barrel is a decrease in recoil (e.g. kick) of a firearm system that fires the projectile 104. This decrease in recoil not only makes operation of the firearm system simpler for a use and can provide for faster and/or more accurate follow-up shots, the decreased recoil also reduces wear on the mechanical operation components of the firearm system. For example, in a conventional firearm system using conventional projectiles, the increased recoil causes an increased movement at a higher force of various components of the firearm system. Over time, this recoil and/or movement of the components of the firearm system, causes the components to wear down and/or break. By reducing that recoil and/or movement of the firearm system, the components have reduced wear and a longer lifespan as compared to when conventional projectiles are used.
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[0055] In some implementations, the freebore (the space between the neck and lead of a barrel) has also been optimized in the projectile system 100 to effectively deal with ogive/bore interface and maximize accuracy. The freebore length affects when the projectile engages with the rifling of the barrel after it is fired. With respect to the projectile system 100 implementations, this freebore value has been optimized to be less than 0.632 caliber (and specifically 0.2147 for a 338 projectile) with estimated optimal being 0.0 to 0.050. 1 In this example, by choking back on the freebore, the design ensures that the bearing surface has no chance to deflect or vector once the round is fired. Rather, it immediately enters the bore, which ensures that the round is stabilized as much as feasibly possible.
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[0057] embodiment, the projectile 104f could be developed with a stabilizing front section 1002, which could also be achieved with the bore gauge lugs (e.g. grooves/flutes 108) which would allow for reduced bearing sections 1004 and therefore reduced friction in the barrel and a higher muzzle velocity and muzzle energy of the projectile 104f. Another way of stabilizing the projectile 104 would be to abandon the lugs and secant Ogive design and simply build a bore gauge projectile with a trailing end that was rifling gauge or caliber. For example, in a 338 rifle the bulk of the projectile 104f would be 0.330 diameter and the trailing or bearing surface 1004 would be 0.338. The aerodynamic characteristics would not be as efficient as the decant Ogive design described elsewhere herein, but a high muzzle velocity would be achievable due to reduced friction of the smaller bearing area 1004.
[0058] The formula for bullet RPM is: Muzzle Velocity (fps)720/Twist rate. The maximum bullet RPM is in the neighborhood of 300000. Bullet failures may occur at higher spin values and this is due to friction and heat. Given that the projectile 104 as described herein has a lower friction level and therefore generates less heat it plausible to assume to a person skilled in the art, that these designs allow for higher spin. Furthermore, the faster the bullet spins the more stable it is, which allows for the projectile 104 to have both the faster bullet spin and be more stable, improving accuracy and muzzle velocity of the projectile 104.
[0059] In one example, a 338 projectile round runs 3200 fps in a 9.3 twist barrel which results in 247,742 rpm. The calculated optimum twist rate is somewhere between 6.76 and 8.45. The optimum twist rate can be calculated based on length (in this specific example, 1.819) to diameter (338) which is 5.38 and that the required twist rate could be 20-25 calibers which yields the above numbers. Which yields RPMs of 341000 and 272000. In an example that can achieve the desired muzzle velocity, the projected RPM would be well above 300000, which is higher than conventional 338 projectiles currently can attain.
[0060] It should be understood that the above-described example embodiments are provided by way of illustration and not limitation and that numerous additional use cases are contemplated and encompassed by the present disclosure. In the above description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. However, it should be understood that the hardware and technology described herein may be practiced without these specific details. Various implementations are described as having particular hardware, software, and technology. However, the present disclosure applies to any type of device that can receive data and commands, and to any peripheral devices providing services.
[0061] The foregoing description has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the specification to the precise form disclosed. Many modifications and variations are possible in light of the above teaching. It is intended that the scope of the disclosure be limited not by this detailed description, but rather by the claims of this application. As will be understood by those familiar with the art, the specification may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Likewise, the particular naming and division of the modules, routines, features, attributes, methodologies and other aspects are not mandatory or significant, and the mechanisms that implement the specification or its features may have different names, divisions and/or formats.
[0062] Furthermore, the modules, routines, features, attributes, methodologies and other aspects of the disclosure can be implemented as software, hardware, firmware, or any combination of the foregoing. Also, wherever an element, an example of which is a module, of the specification is implemented as software, the element can be implemented as a standalone program, as part of a larger program, as a plurality of separate programs, as a statically or dynamically linked library, as a kernel loadable module, as a device driver, and/or in every and any other way known now or in the future. Additionally, the disclosure is in no way limited to implementation in any specific programming language, or for any specific operating system or environment. Accordingly, the disclosure is intended to be illustrative, but not limiting, of the scope of the subject matter set forth in the following claims.