公开(公告)号：US11933565B2

公开(公告)日：2024-03-19

申请号：US18049813

申请日：2022-10-26

申请人： Frederick H. Kart

发明人： Frederick H. Kart

IPC分类号： F41A21/18

CPC分类号： F41A21/18

摘要： A firearm barrel, including rifling formed of an alternating, spirally-extending plurality of grooves and lands defining a twist angle adapted for imparting rotation to a bullet being impelled through the barrel from a chamber end to and exiting a muzzle end. The plurality of lands each include a reduced width component communicating with the chamber end of the barrel for a predetermined distance towards the muzzle end of the barrel. The reduced width component defines an acute angle in relation to a longitudinal axis of the barrel adapted to cause a bullet being fired from the firearm to prevent blow-by gases to exit the barrel in advance of the bullet. A method of forming the firearm and barrel is also disclosed.

公开(公告)号：US20230204315A1

公开(公告)日：2023-06-29

申请号：US17563076

申请日：2021-12-28

申请人： Robert S. Randazzo ,  Michael Allyn Miller ,  Richard Brady Olsen

发明人： Robert S. Randazzo ,  Michael Allyn Miller ,  Richard Brady Olsen

IPC分类号： F41A21/18

CPC分类号： F41A21/18

摘要： A barrel for use in a firearm optimized to fire subsonic ammunition with high precision. The barrel groove diameter being within 0.0003 inch of the nominal bullet diameter and the barrel has at least 8 rifled grooves. Each of the plurality of rifling grooves has a sidewall formed from the bore diameter to the groove diameter, wherein the sidewalls formed are substantially parallel and the depth of each of the rifling grooves is shallow. The bullet is obturated as the bullet is forced down the bore. The plurality of shallow barrel grooves forming a plurality of raised lands upon the bullet. The obturated bullet having at least 50% lands formed around the circumference of the bullet body. The buffeting effect upon the bullet in flight by a transition shock wave upon the raised bullet lands is reduced by the plurality of bullet lands and the reduced height of each of the plurality of bullet lands.

公开(公告)号：US20210254919A1

公开(公告)日：2021-08-19

申请号：US17109816

申请日：2020-12-02

申请人： Chris Lee BILLINGS

发明人： Chris Lee BILLINGS

IPC分类号： F41A21/18

摘要： A rifled barrel has a cylindrical channel longitudinally extending within the rifled barrel between an oppositely oriented muzzle opening and a breach opening, the cylindrical channel having a rifled portion and a non-rifled portion, the rifled portion having a land and a groove helically extending along a surface of the cylindrical channel from the muzzle opening toward the breach opening, the non-rifled portion being smooth and having a consistent diameter along a length. The diameter of the non-rifled portion of the cylindrical channel is equal to a diameter of the rifled portion measured between oppositely oriented sections of the groove. A transitional section of the rifled portion has a diameter measured between oppositely oriented land sections that gradually decreases along a section of the rifled portion adjacent to the non-rifled portion until equaling the diameter of the non-rifled portion.

公开(公告)号：US20210080214A1

公开(公告)日：2021-03-18

申请号：US17018174

申请日：2020-09-11

申请人： GOG Paintball, S.A.

发明人： William M. Gardner, Jr. ,  Hans Semelsberger

IPC分类号： F41A21/18 ,  F41A21/10

摘要： An barrel (or barrel section) for a pneumatic gun can comprise a plurality of grooves and ridges arranged in parallel straight lines. The ridges may have a substantially arch-shaped cross-section with a rounded upper surface to provide minimal contact with a projectile such as a paintball being launched through the barrel. The grooves preferably provide channels to permit water and debris to be expelled from the barrel without interfering with the projectile travel. A plurality of apertures may be formed through a sidewall of the barrel along one or more of the grooves to further help expel water and debris, to impart spin to the projectile, and/or to improve a sound signature of the barrel.

公开(公告)号：US10883785B1

公开(公告)日：2021-01-05

申请号：US16570212

申请日：2019-09-13

申请人： U.S. Government as Represented by the Secretary of the Army

发明人： David Rophael ,  Adam L. Foltz

IPC分类号： F41A21/18

摘要： A rifled weapon barrel has increases the piezometric efficiency of the weapon system with varying rifling profiles throughout the barrel to maximize useful work out of the propellant gases. The weapon barrel includes a first rifling section at the breech end which progressively increases in twist rate to induce a torque spike on the projectile and maximize chamber pressure. Next, the weapon barrel includes a second rifling section which progressively decreases the twist rate to a level that may be unsuitable for aerodynamic stability but provides relief from the torque spike while minimizing pressure loss behind the projectile. Finally, the rifle then maintains this twist rate or decreases to increase stability of the projectile before exit.

公开(公告)号：US09631887B2

公开(公告)日：2017-04-25

申请号：US14962351

申请日：2015-12-08

申请人： F.J. Feddersen, Inc.

发明人： Frederick J. Feddersen

IPC分类号： F41A21/18

CPC分类号： F41A21/18

摘要： The present invention relates to rifling of a gun barrel to provide grooves and bores in the gun barrel separated by a single edge area and a polygonal area.

公开(公告)号：US09389052B2

公开(公告)日：2016-07-12

申请号：US14029847

申请日：2013-09-18

申请人： U.S. Army Research Laboratory

发明人： Paul J. Conroy ,  Daniel R. Gubernat

IPC分类号： F41A21/18 ,  F42B12/08 ,  F42B12/74 ,  F42B12/78 ,  F42B30/02

CPC分类号： F42B12/08 ,  F41A21/18 ,  F42B12/74 ,  F42B12/78 ,  F42B30/02

摘要： A jacketed bullet having a penetrator constructed of a hard material in line with a slug having a lower modulus. At least a portion of both the slug and the penetrator are then encased by a metal jacket. A plurality of circumferentially spaced and axially extending flutes are formed along the slug and possibly the penetrator. These flutes receive deformation of the jacket upon firing of the bullet into a rifled gun bore to thereby reduce friction between the bullet and the gun bore during operation.

摘要翻译： 一种夹套子弹，具有由硬质材料构成的穿孔器，该硬质材料与具有较低模量的块状物一致。 然后，两个塞子和穿透器的至少一部分被金属护套包住。 沿着塞子和可能的穿透器形成多个周向间隔开并且轴向延伸的凹槽。 这些凹槽在将子弹击中膛口枪孔时接收夹套的变形，从而在操作期间减小子弹与枪孔之间的摩擦。

公开(公告)号：US08959821B1

公开(公告)日：2015-02-24

申请号：US14468640

申请日：2014-08-26

申请人： FBMS Associates, Trustee for Firearm Barrel-Modification System CRT Trust

发明人： S. Mill Calvert

IPC分类号： F41A21/00 ,  F41A21/48 ,  F41A21/18

CPC分类号： F41A21/484 ,  F41A21/18 ,  F41A21/32

摘要： A system for firearm barrel modification includes a firearm, a collar and an auxiliary barrel. The firearm has a barrel with holes extending inward from the first muzzle end. The barrel has rifling. The collar surrounds the barrel to serve as a securing anchor for an auxiliary barrel. A sleeve slidably engages onto the firearm from the muzzle. The sleeve contains a tubular component, serving as a barrel extension. The tubular component extends from within the sleeve to form a second muzzle at the opposite end. The mating end of the barrel extension is situated within the sleeve. It butts up against the muzzle and is aligned with the rifling of the gun. Alignment rods protrude from the mating end of the tubular component and insert into corresponding holes at the muzzle end of the firearm. A spring member attached to the sleeve sets in place over the collar.

摘要翻译： 用于枪支枪管改装的系统包括枪支，衣领和辅助枪管。 枪支具有从第一个枪口端向内延伸的孔的枪管。 枪管有膛线。 衣领环绕桶，用作辅助桶的固定锚。 套筒从枪口可滑动地接合到火器上。 套管包含管状部件，用作筒体延伸部。 管状部件从套筒内延伸，在相对端形成第二个枪口。 枪管延伸部的配合端位于套筒内。 它与枪口对接，与枪的枪口保持一致。 对准杆从管状部件的配合端突出并插入到枪械枪口端的相应孔中。 附接到套筒上的弹簧构件套在套环上的适当位置。

公开(公告)号：US20140352192A1

公开(公告)日：2014-12-04

申请号：US14104033

申请日：2013-12-12

申请人： Steven Mark Camilleri

发明人： Steven Mark Camilleri

IPC分类号： F41A21/18 ,  F42B12/74 ,  F41B11/70

CPC分类号： F41A21/32

摘要： This invention is a precision weapon that utilises solely as a projectile, a precision-ball made out of a suitable material namely solid C260 brass. It employs a smoothbore precision-barrel with a metal toothed rack/rail affixed along the northern hemisphere of the muzzle of the barrel that effectively converts some of the forward motion of the ball into rotational motion so that the ball is mechanically forced to rotate upwards/backwards at very high speed that can run into millions of rotations per minute, vastly improving it's ballistic coefficient and downrange accuracy. The weapon can be produced in a variety of existing types of firearms such as bolt-action, falling-block or semi-automatic, and can be chambered for a variety of calibers. A 5.5625 mm caliber bolt-action rimfire weapon for instance will provide a user with a weapon ideal for hunting small-game or for target shooting purposes.

摘要翻译： 本发明是仅用作抛射体的精密武器，由适合的材料即固体C260黄铜制成的精密球。 它采用了一个带有金属齿条/导轨的圆孔精密枪管，沿着枪管枪口的北半球固定，有效地将球的一些向前运动转换为旋转运动，使得球被机械地向上/ 以非常高的速度向后，每分钟可以达到数百万转，大大提高了其弹道系数和精度降低。 武器可以生产各种现有类型的火器，如螺栓动作，落块或半自动，可以为各种口径进行腔室制造。 一个5.5625毫米口径的螺栓动作圈火枪武器，例如将为用户提供一种非常适合狩猎小型游戏或瞄准射击目的的武器。

公开(公告)号：US08516729B2

公开(公告)日：2013-08-27

申请号：US13102618

申请日：2011-05-06

申请人： John Hayes ,  David J. W. Lovinger

发明人： John Hayes ,  David J. W. Lovinger

IPC分类号： F41A19/06 ,  F41A19/10 ,  F41A19/18 ,  F41A21/06 ,  F41A21/18 ,  F41F1/08

CPC分类号： F41C3/16 ,  F41A19/21 ,  F41A19/23 ,  F41A21/02

摘要： A gun that has a plurality of frangible barrels. At the proximal end of each barrel is a chamber that receives a cartridge. The cartridge has a reduced charge as compared to a conventional cartridge. Each barrel may have an inner sleeve formed from a malleable material. The out member of each barrel is comprised of a rigid material such as, but not limited to, a filled plastic. The inner sleeve is rigid enough to withstand the pressure of the reduced charge cartridge when fired, but is malleable enough to expand from the pressure generated by a standard charge cartridge. When the inner sleeve expands, the outer member fragments and destroys the weapon. The expansion of the inner sleeve and fragmentation of the outer member upon firing a standard charge reduces the propelling force in the bullet. As a result, the weapon is destroyed and the bullet is fired with a greatly reduced force. The barrels on the gun don not rotate. The hammer is mounted in a revolving mechanism that is rotated in a circular path from one barrel to the next when the trigger is pulled. Pulling the trigger also compresses and then releases a revolving member that forces the hammer into contact with one of the firing pins.

摘要翻译： 具有多个易碎桶的枪。 在每个筒的近端是容纳盒的腔室。 与常规墨盒相比，墨盒具有减少的电荷。 每个桶可以具有由可延展材料形成的内套筒。 每个桶的外部构件由刚性材料构成，例如但不限于填充塑料。 内套筒刚性足以承受降低充电筒的燃烧时的压力，但是足够膨胀以从标准充电盒产生的压力膨胀。 当内套筒膨胀时，外部构件会碎片并破坏武器。 内部套管的膨胀和外部构件在烧制标准电荷时的分裂会降低子弹中的推进力。 因此，武器被毁坏，子弹以大大减少的力量被射击。 枪上的枪不旋转。 锤子被安装在旋转机构中，当旋转扳机被拉动时，该旋转机构在从一个圆筒到另一个圆筒的圆形路径中旋转。 拉动扳机还压缩然后释放一个旋转构件，迫使锤与其中一个击发销接触。