Barrel for a firearm with locking space, and production process

Patent metadata

Field	Value
Publication number	US-11879699-B2
Application number	US-202017753520-A
Country	US
Kind code	B2
Filing date	Sep 28, 2020
Priority date	Oct 4, 2019
Publication date	Jan 23, 2024
Grant date	Jan 23, 2024

Abstract

A barrel for a firearm having a bore axis, a cartridge chamber, and an integrally formed locking sleeve with a locking space, with locking lugs, the locking sleeve has recesses for bolt head lugs of a bolt head to be inserted. The barrel has, in the direction towards the cartridge chamber, at least two centering ramps in the transition area between the recess for the lugs and the locking space in an oblique manner with respect to the bore axis. Further the recesses forming the bayonet-type groove, viewed in the direction of the bore axis, each have a profile which comprises an elliptical segment. The disclosure additionally provides a production process for such a barrel.

First claim

The invention claimed is:

1. A barrel for a firearm; wherein
the barrel defines a bore axis;
the barrel defines a cartridge chamber; and
the barrel defines an integrally-formed locking sleeve including a locking space, the locking sleeve including a plurality of inwardly extending locking lugs that are integrally formed with the barrel, and the locking sleeve defining a plurality of recesses configured to receive bolt head lugs of a bolt head to be introduced into the locking sleeve, the plurality of recesses forming grooves for a bayonet-type coupling between the locking sleeve and the bolt head;
wherein at least two centering ramps are formed in a transition area between the recesses for receiving the bolt head lugs and the locking space, the centering ramps extending in a direction towards the cartridge chamber in an oblique manner with respect to the bore axis, such that the centering ramps are configured to guide the bolt head in a centering manner when the bolt head is introduced into the locking space of the locking sleeve; and
wherein the recesses forming the grooves for the bayonet-type coupling between the locking sleeve and the bolt head, when viewed in the direction of the bore axis, each exhibit a profile that includes an elliptical segment.

2. The barrel for a firearm according to claim 1 , wherein each oblique centering ramp extends at an oblique angle α with respect to the bore axis, wherein 0°<α<90°.

3. The barrel for a firearm according to claim 1 , wherein each oblique centering ramp extends at an oblique angle α with respect to the bore axis, wherein 15°<α<75°.

4. The barrel for a firearm according to claim 1 , wherein each oblique centering ramp extends at an oblique angle α with respect to the bore axis, wherein 45°<α<60°.

5. A firearm, comprising a barrel;
wherein the barrel defines a bore axis;
the barrel defines a cartridge chamber; and
the barrel defines an integrally-formed locking sleeve including a locking space, the locking sleeve including a plurality of inwardly extending locking lugs that are integrally formed with the barrel, and the locking sleeve defining a plurality of recesses configured to receive bolt head lugs of a bolt head to be introduced into the locking sleeve, the plurality of recesses forming grooves for a bayonet-type coupling between the locking sleeve and the bolt head;
wherein at least two centering ramps are formed in a transition area between the recesses for receiving the bolt head lugs and the locking space, the centering ramps extending in a direction towards the cartridge chamber in an oblique manner with respect to the bore axis, such that the centering ramps are configured to guide the bolt head in a centering manner when the bolt head is introduced into the locking space of the locking sleeve; and
wherein the recesses forming the grooves for the bayonet-type coupling between the locking sleeve and the bolt head, when viewed in the direction of the bore axis, each exhibit a profile that includes an elliptical segment.

6. The firearm according to claim 5 , the firearm further comprising the bolt head to be introduced into the locking sleeve, wherein the locking lugs of the bolt head include obliquely formed mating surfaces toward the centering ramp ( 6 ).

7. The firearm according to claim 5 , wherein the firearm is a rifle.

8. The firearm according to claim 5 , wherein the firearm is an automatic rifle.

9. A method for producing a barrel for a firearm, comprising:
providing a one-piece barrel that defines a cartridge chamber and a locking sleeve, the locking sleeve including a locking space;
forming at least two recesses in the locking sleeve configured to receive bolt head lugs; and
forming at least two centering ramps in a transition area between the at least two recesses for bolt head lugs in a direction toward the cartridge chamber and the locking space.

10. The method according to claim 9 , wherein forming the at least two centering ramps is performed in a machining manner.

11. The method according to claim 9 , wherein forming the at least two centering ramps includes obliquely applying a cutter along a path parallel to the bore axis.

12. The method according to claim 9 , wherein forming the at least two centering ramps including forming the at least two centering ramps by a two-stage shaping process.

13. The method according to claim 9 , wherein the locking sleeve defined by the barrel is formed by additive manufacturing.

Assignees

• Glock Tech Gmbh

Inventors

• Sereinig Siegfried

Classifications

• F41A3/30 Primary

  Interlocking means, e.g. locking lugs, screw threads · CPC title

• F41A21/12

  Cartridge chambers; Chamber liners (F41A3/74, F41A9/46, F41A21/04 take precedence) · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title