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：US11933565B2

公开(公告)日：2024-03-19

申请号：US18049813

申请日：2022-10-26

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：US20230228512A1

公开(公告)日：2023-07-20

申请号：US18049813

申请日：2022-10-26

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：US11493296B1

公开(公告)日：2022-11-08

申请号：US17496340

申请日：2021-10-07

Applicant: Frederick H. Kart

Inventor： Frederick H. Kart

IPC: 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：US5753848A

公开(公告)日：1998-05-19

申请号：US679459

申请日：1996-07-09

Applicant: Frederick H. Kart

Inventor： Frederick H. Kart

IPC: F41A3/14 ,  F41A5/04

CPC classification number: F41A5/04 ,  F41A3/14

Abstract: In a barrel of a semi-automatic pistol, the barrel having fore and aft barrel locking grooves for locking into corresponding fore and aft slide assembly wall segments formed in a slide mounted on a receiver of the pistol when the barrel is in its lock-up position, the improvement comprising adjustment means for precision-fitting the barrel to the dimensions and tolerances of the slide and the receiver of the pistol. The barrel includes a pair of raised contact pads integrally-formed in laterally-spaced relation in the aft locking groove of the barrel to provide an initial vertical interference fit between the aft locking groove of the barrel and the aft locking wall segment of the slide. The contact pads are adapted for incremental trial-and-error removal until a just-sufficient amount material from one or both of the contact pads has been removed to cause the barrel to move into the proper lock-up position with lock-up pressure transferred onto the top of a slide stop pin on which the barrel is pivotally mounted with the barrel locking grooves intimately engaged with the aft locking wall segment of the slide assembly.

Abstract translation: 在一个半自动手枪枪管中，枪管具有前，后枪管锁定槽，用于当枪管处于其锁定状态时锁定到形成在安装在手枪的接收器上的滑块中的相应的前后滑动组件壁段 位置，改进包括用于将枪管精确配合到手枪的滑盖和接收器的尺寸和公差的调节装置。 枪管包括一对凸起的接触垫，其一体地形成在筒的后部锁定槽中的横向间隔的关系中，以提供在筒的后部锁定槽和滑动件的后部锁定壁段之间的初始垂直过盈配合。 接触垫适用于逐渐的试错拆除，直到从一个或两个接触垫的恰当量的材料已经被去除，导致筒移动到适当的锁定位置，同时锁定压力传递 在滑动止动销的顶部上，所述筒被枢转地安装，其中所述筒锁定槽与所述滑动组件的后部锁定壁段紧密接合。

公开(公告)号：US06318231B1

公开(公告)日：2001-11-20

申请号：US09426604

申请日：1999-10-26

Applicant: Frederick H. Kart

Inventor： Frederick H. Kart

IPC: F41A314

CPC classification number: F41A25/22

Abstract: A barrel bushing for a semi-automatic pistol. The barrel bushing defines a bore for receiving a barrel therein for reciprocating movement during operation of the pistol. The improvement to the barrel bushing comprises first, second and third annular bearing surfaces formed on inner walls of the bore and against which the barrel moves during operation of the pistol. The first bearing surface contacts and supports the barrel during the recoil phase of operation, and defines a plane parallel to the longitudinal axis of the barrel during recoil. The second and third bearing surfaces reside in axially spaced-apart relation on opposite axially-extending sides of the first bearing surface and define respective planes with respect to the first bearing surface which are parallel to the longitudinal axis of the barrel during lockup and on which opposite upper and lower surfaces of the barrel are supported during lockup. A method of manufacturing the barrel bushing is also disclosed.

Abstract translation: 用于半自动手枪的桶套管。 枪管衬套限定了用于在其中接收枪管的孔，用于在手枪操作期间往复运动。 对筒套的改进包括形成在孔的内壁上的第一，第二和第三环形支承表面，并且枪在枪的操作期间移动。 第一支承表面在操作的反冲阶段期间接触和支撑桶，并且在反冲期间限定平行于桶的纵向轴线的平面。 第二和第三轴承表面在第一支承表面的相对的轴向延伸的侧面上处于轴向间隔开的关系，并且在锁定期间相对于第一支承表面限定平行于滚筒的纵向轴线的相应平面， 在锁定期间支撑桶的相对的上表面和下表面。 还公开了制造筒套的方法。

公开(公告)号：US4127056A

公开(公告)日：1978-11-28

申请号：US811629

申请日：1977-06-30

Applicant: Frederick H. Kart

Inventor： Frederick H. Kart

IPC: F41A21/48 ,  F41C5/00

CPC classification number: F41A21/488 ,  F41A21/484

Abstract: The invention provides a barrel locking device for automatic pistols, and a sub-caliber conversion therefor. The essential elements of the locking device are the barrel, the aligning cheeks at the rear end of the barrel, the barrel extension member, a link pivotally connected to such barrel extension member and having a hole therein, a slide-stop having a pivot pin for engagement in a transverse through hole in the piston receiver and in the hole in the link, and a barrel locking screw which engages in a threaded hole in the front face of the extension member. Upon tightening of the barrel locking screw the link is rotated forwardly and pulls the barrel and slide into intimate contact with the receiver by engagement of the barrel cheeks with the upper surface of the receiver.

Abstract translation: 本发明提供了一种用于自动手枪的枪管锁定装置和用于其的子口径转换。 锁定装置的基本元件是桶，桶的后端处的对齐面板，筒延伸构件，可枢转地连接到这种筒延伸构件并且在其中具有孔的连杆，具有枢轴销的滑动止动件 用于接合在活塞接收器中的横向通孔中和连杆中的孔中，以及与延伸构件的前表面中的螺纹孔接合的镜筒锁定螺钉。 在紧固桶锁定螺钉时，连杆向前旋转并且拉动筒体并且通过桶形脸颊与接收器的上表面接合而滑动到与接收器紧密接触。