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：US20190234720A1

公开(公告)日：2019-08-01

申请号：US16377224

申请日：2019-04-07

申请人： Franklin Armory Holdings, Inc.

发明人： Ryan Paul Fellows ,  Jay Leonard Jacobson

IPC分类号： F42B10/06 ,  F42B5/02 ,  F41A21/24

CPC分类号： F41A21/24 ,  F41A21/18 ,  F42B5/025 ,  F42B10/06 ,  F42B10/08 ,  F42B14/061 ,  F42B14/062

摘要： A firearm barrel has an elongated body defining a bore and defining a bore axis, the body defining a breech end and an opposed muzzle end, a chamber defined in the breech end and contiguous with the bore; the bore having an interior surface having a plurality of alternating lands and grooves, the grooves being surfaces separated from the bore axis by first radius, the lands being surfaces separated from the bore axis by second radius less than the first radius and the lands and grooves being straight elements parallel to the bore axis, such that no spin is imparted to a projectile propelled down the bore. The lands and grooves may extend from the chamber to the muzzle end. The bore may have a constant cross-sectional profile along its length.

公开(公告)号：US20180231347A1

公开(公告)日：2018-08-16

申请号：US15880605

申请日：2018-01-26

申请人： CC3D LLC

发明人： KENNETH LYLE TYLER ,  Ryan C. Stockett

IPC分类号： F41C23/18 ,  F41A21/02 ,  B29C70/88 ,  B29C70/72

CPC分类号： F41A21/02 ,  A63B24/0062 ,  A63B49/00 ,  A63B49/02 ,  A63B49/10 ,  A63B53/10 ,  A63B53/14 ,  A63B60/00 ,  A63B60/08 ,  A63B60/42 ,  A63B71/06 ,  A63B71/0622 ,  A63B71/12 ,  A63B2071/0658 ,  A63B2102/22 ,  A63B2102/24 ,  A63B2102/34 ,  A63B2207/02 ,  A63B2208/03 ,  A63B2209/00 ,  A63B2209/023 ,  A63B2220/51 ,  A63B2220/54 ,  A63B2220/805 ,  A63B2244/18 ,  A63B2244/19 ,  A63C5/052 ,  A63C5/06 ,  A63C5/075 ,  A63C5/12 ,  A63C11/003 ,  A63C2203/14 ,  A63C2203/18 ,  B29C64/165 ,  B29C70/08 ,  B29C70/382 ,  B29C70/384 ,  B29C70/70 ,  B29C70/72 ,  B29C70/86 ,  B29C70/88 ,  B29K2105/08 ,  B29K2677/10 ,  B29K2707/04 ,  B29K2709/08 ,  B29K2995/0063 ,  B29K2995/0082 ,  B29L2031/48 ,  B29L2031/52 ,  B33Y10/00 ,  B33Y80/00 ,  D03D3/02 ,  D10B2101/06 ,  D10B2101/12 ,  D10B2331/02 ,  D10B2401/061 ,  D10B2401/062 ,  D10B2403/02 ,  D10B2501/00 ,  D10B2507/00 ,  F41A3/66 ,  F41A21/18 ,  F41C23/18 ,  G01L5/0052

摘要： A sporting equipment is disclosed. The sporting equipment may include a barrel, an action connected to a base end of the barrel, and a stock connected to the action opposite the barrel. At least two of the barrel, the action, and the stock are fabricated from a plurality of fibers.

公开(公告)号：US20180202736A1

公开(公告)日：2018-07-19

申请号：US15868633

申请日：2018-01-11

申请人： Wilcox Industries Corp.

发明人： James W. Teetzel ,  Jared Majcher

IPC分类号： F41A11/02 ,  F41A21/48

CPC分类号： F41A11/02 ,  F41A11/06 ,  F41A21/04 ,  F41A21/18 ,  F41A21/482

摘要： A modular barrel system for firearm includes a first barrel segment and a second barrel segment. Each barrel segment comprises a tubular member having an axial bore, a proximal end, and a distal end. The proximal end of the first barrel segment has a first threaded element for removably attaching the first barrel segment to a firearm. The distal end of the first barrel segment has a second threaded element and the proximal end of the second barrel segment has a third threaded element which is complementary with the second threaded element, the third threaded element for removably attaching the second barrel segment to the first barrel segment. In a further aspect, method for the manufacture of a modular barrel system are provided.

公开(公告)号：US20180051967A1

公开(公告)日：2018-02-22

申请号：US15424626

申请日：2017-02-03

申请人： Todd Ronald Schwark

发明人： Todd Ronald Schwark

IPC分类号： F42B10/26

CPC分类号： F42B10/26 ,  F41A21/18 ,  F42B10/06 ,  F42B10/28 ,  F42B30/02

摘要： A bullet may have its base shaped such that explosive from the cartridge or chamber causes the bullet to spin. A bullet may have any shape to the base that causes spinning that closely or exactly matches the rifling of a particular rifle. The base may be structured to achieve an impellor or turbine action to angularly accelerate the bullet while the bullet is being acted upon by an axial force from a propellant explosion during free travel within the gun or while travelling along the rifling.

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：US07802394B1

公开(公告)日：2010-09-28

申请号：US11899647

申请日：2007-09-07

申请人： David John Bartoli

发明人： David John Bartoli

IPC分类号： F41A21/00

CPC分类号： F41A21/18

摘要： A rifle having a rifled barrel and a cartridge having a bullet having a diameter, a length, a ballistic coefficient (BC), and a muzzle velocity (V1) greater than 1250 ft/sec are related to achieve accuracy at very long range in that the twist of the rifling is substantially equal to: 83.7 ÷ ( bullet ⁢ ⁢ ⁢ length × 2 ⁢ B ⁢ ⁢ C bullet ⁢ ⁢ diameter ) × bullet ⁢ ⁢ diameter × [ 1 + ( V 3 V 1 × 0.667 ) ] where: V2 is the entry speed for the transonic, i.e. 1,250 ft/sec., and V3 is V1 minus V2. A rifle barrel for receiving a bullet has rifling twist according to the relationship. A method uses the relationship to determine the rifling twist for a rifle barrel receiving a known bullet. Another method uses the relationship to design a cartridge for a known barrel rifling. The relationship is particularly applicable for bullets having a high BC, such as 0.325 or greater.

摘要翻译： 具有膛线枪的枪和具有直径，长度，弹道系数（BC）和大于1250ft / sec的枪口速度（V1）的子弹的药筒都可以在非常长的范围内实现精确度，因为 膛线的捻度基本上等于：83.7÷（bullet？⁢长×2B⁢C bullet ud直径）×bullet通径×[1 +（V 3 V 1×0.667）]其中： V2是跨音速的输入速度，即1,250英尺/秒，V3是V1减去V2。 根据关系，用于接收子弹的步枪枪具有膛线扭转。 一种方法使用关系来确定接收已知子弹的步枪枪的膛线扭转。 另一种方法使用关系来设计用于已知筒枪的筒。 该关系特别适用于具有高BC的子弹，例如0.325或更大。