Gas vent for firearm

• US 9,383,154 B2
• Filed: 11/17/2014
• Issued: 07/05/2016
• Est. Priority Date: 12/12/2013
• Status: Active Grant

• Current Assignee: REM TML Holdings LLC
• Original Assignee: RA Brands LLC (RA Factors, Inc.)
• Inventors: Stone, Jeffrey W.
• Primary Examiner(s): FREEMAN, JOSHUA E
• Application Number:
  US14/543,242
• Publication Number:
  US 20150168092A1
• Time in Patent Office: 596 Days
• Field of Search: 42/760.1, 42/77, 891/93
• US Class Current: 1/1
• CPC Class Codes: F41A 21/28 Gas-expansion chambers; Barrels provided with gas-relieving ports F41A1/06, F41A13/08 and F41A21/36 take precedence
• CPC Class Codes: F41A 21/481 using partial or interrupted threads, e.g. bayonet-type mountings

Abstract

A barrel and a barrel extension for being coupled to a firearm. The barrel extension can be threadedly engaged with a proximal end of the barrel. A chamber of the firearm can extend in at least the proximal end of the barrel. One or more channels can be formed in the exterior surface of the proximal end of the barrel and/or the interior surface of the barrel extension for providing fluid communication from the chamber to the forward end of the barrel extension between the barrel extension and the proximal end of the barrel for venting high pressure gases that may develop in the chamber.

Claims

1. A barrel for a firearm, the barrel comprising:

a chamber at a proximal end thereof, the proximal end of the barrel being configured to be at least partially received in mating engagement with a receiver of the firearm; and

a gas vent feature formed in an exterior surface of the barrel adjacent the proximal end of the barrel, the gas vent feature being configured to enable high pressure gases vented from the chamber away from the receiver and toward a distal end of the barrel,

wherein the gas vent feature comprises at least one channel having a selected depth formed in the exterior surface of the barrel, and

wherein the at least one channel comprises a forward end with a tapered depth, wherein the depth of the at least one channel tapers from a lowermost surface of the at least one channel to an exterior surface of the barrel.

2. The barrel of claim 1, wherein the gas vent feature comprises a series of channels formed in substantially evenly spaced series about a circumference of the proximal end of the barrel.

3. A barrel for a firearm, the barrel comprising:

a chamber at a proximal end thereof, the proximal end of the barrel being configured to be at least partially received in mating engagement with a receiver of the firearm; and

a gas vent feature formed in an exterior surface of the barrel adjacent the proximal end of the barrel, the gas vent feature being configured to enable high pressure gases vented from the chamber away from the receiver and toward a distal end of the barrel,

wherein the barrel comprises a shoulder adjacent the proximal end, the shoulder being for engaging a barrel nut and a forward face of at least one of the receiver and a barrel extension, and wherein the gas vent feature comprises at least one channel extending from a rearward face of the proximal end of the barrel through the shoulder, and the gas vent feature having a tapered forward end that is disposed on an opposing side of the shoulder from the proximal end of the barrel.

4. A firearm, comprising:

a receiver including a front end;

a barrel coupled to the front end of the receiver and defining a chamber at a proximal end of the barrel; and

a gas vent feature adjacent the proximal end of the barrel and configured to vent gases from the chamber, wherein a portion of the gas vent feature has a depth that gradually decreases to an exterior surface of the barrel.

5. The firearm of claim 4, wherein the gas vent feature comprises at least one channel formed in the exterior surface of the barrel.

6. The firearm of claim 5, wherein the proximal end of the barrel comprises a series of threads for engaging a corresponding threaded portion of a receiver bore or an axial bore of a barrel extension, and wherein the at least one channel extends at least partially through the external threads.

7. The firearm of claim 4, wherein the barrel comprises a shoulder, and the gas vent feature comprises at least one relief formed in the barrel through at least a portion of the shoulder.

8. The firearm of claim 4, wherein the gas vent feature comprises a plurality of channels that are spaced about a circumference of the proximal end of the barrel.

9. A firearm, comprising:

a receiver including a front end;

a barrel coupled to the front end of the receiver and defining a chamber at a proximal end of the barrel; and

a gas vent feature adjacent the proximal end of the barrel and configured to vent gases from the chamber, wherein the gas vent feature comprises at least one channel formed along the barrel; and

a sloped portion that extends along the at least one channel to an outer surface of the barrel.

10. The firearm of claim 9, wherein the proximal end of the barrel comprises a series of threads for engaging a corresponding threaded portion of a receiver bore or an axial bore of a barrel extension, and wherein the at least one channel extends at least partially through the external threads.

11. The firearm of claim 9, wherein the barrel comprises a shoulder adjacent the proximal end of the barrel for engaging a barrel nut and a forward face of at least one of the receiver and a barrel extension.

12. The firearm of claim 9, wherein the gas vent feature comprises a series of channels substantially evenly spaced about a circumference of the proximal end of the barrel.

13. A firearm, comprising:

a receiver including a front end;

a barrel coupled to the front end of the receiver, the barrel including a shoulder and defining a chamber at a proximal end of the barrel; and

a gas vent feature adjacent the proximal end of the barrel to vent gases from the chamber,

wherein the gas vent feature includes a tapered portion arranged along an exterior surface of the barrel from the proximal end of the barrel to an opposing side of the shoulder to gradually direct combustion gases away from the barrel.

14. The firearm of claim 13, wherein the gas vent feature comprises at least one channel formed in the exterior surface of the barrel.

15. The firearm of claim 14, wherein the proximal end of the barrel comprises a series of threads for engaging a corresponding threaded portion of a receiver bore or an axial bore of a barrel extension, and wherein the at least one channel extends at least partially through the external threads.

16. The firearm of claim 13, wherein the gas vent feature comprises a series of channels substantially evenly spaced about a circumference of the proximal end of the barrel.