公开(公告)号：US127849A

公开(公告)日：1872-06-11

申请号：US127849D

CPC classification number: F41A21/18

公开(公告)号：US73447A

公开(公告)日：1868-01-21

申请号：US73447D

CPC classification number: F41A21/18

公开(公告)号：US50502A

公开(公告)日：1865-10-17

申请号：US50502D

CPC classification number: F41A21/18

公开(公告)号：US50433A

公开(公告)日：1865-10-10

申请号：US50433D

CPC classification number: F41A21/18

公开(公告)号：US39024A

公开(公告)日：1863-06-30

申请号：US39024D

CPC classification number: F41A21/18

公开(公告)号：US37193A

公开(公告)日：1862-12-16

申请号：US37193D

IPC: F41A21/16

CPC classification number: F41A21/16 ,  F41A21/18 ,  F41A21/32 ,  F41A21/325 ,  Y10S194/902

公开(公告)号：US12230A

公开(公告)日：1855-01-16

申请号：US12230D

CPC classification number: F41A21/18

公开(公告)号：US20240247900A1

公开(公告)日：2024-07-25

申请号：US18444140

申请日：2024-02-16

Applicant: Frederick H. Kart

Inventor： Frederick H. Kart

IPC: F41A21/18

CPC classification number: F41A21/18

Abstract: 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：US12025418B2

公开(公告)日：2024-07-02

申请号：US17873033

申请日：2022-07-25

Applicant: Axon Enterprise, Inc.

Inventor： Michael E. Gish ,  David Fulton ,  William E. Maginn ,  John Groff ,  Samuel R. Driscoll

IPC: F42B5/02 ,  F41A21/18 ,  F41F1/08 ,  F41H13/00

CPC classification number: F42B5/02 ,  F41A21/18 ,  F41F1/08 ,  F41H13/0025

Abstract: A cartridge for a conducted electrical weapon may comprise a body having a first end opposite a second end and an outer surface opposite an inner surface. A projectile may be disposed within the body. The inner surface of the body may define a plurality of grooves extending from the first end of the body to a location within the body.

公开(公告)号：US11971234B2

公开(公告)日：2024-04-30

申请号：US18102695

申请日：2023-01-28

Applicant: Paul Lee Ewing, Jr.

Inventor： Paul Lee Ewing, Jr.

IPC: F41A21/18 ,  B21D51/20

CPC classification number: F41A21/18 ,  B21D51/20

Abstract: A method of forming a chamber in a barrel blank has the steps of providing an elongated firearm barrel blank defining a bore and having a muzzle end and an opposed breech end, securing the blank in a fixture, determining a first reference location of the bore at a position proximate to the breech end, based on the first reference location, machining a first rough chamber bore at the breech end and along the bore to a selected depth, determining a second reference location of the bore at a position beyond the selected depth, and based on the second reference location, machining a second precision chamber bore. The fixture may be stationary during the steps of determining and machining. The step of determining a first reference location may include probing a surface of the bore and may include probing at least three different positions about the bore.