FIREARM

• US 20090000173A1
• Filed: 09/10/2008
• Published: 01/01/2009
• Est. Priority Date: 02/13/2004
• Status: Abandoned Application

• Current Assignee: RMDI, LLC
• Original Assignee: RMDI, LLC
• Inventors: Nebeker, Darin G., Holway, Jon C., Robinson, Alexander J.
• Application Number:
  US12/208,162
• Publication Number:
  US 20090000173A1
• Time in Patent Office: Days
• US Class Current: 42/75.20
• CPC Class Codes: F41A 11/00 Assembly or disassembly features; Modular concepts; Articulated or collapsible guns F41A3/64, F41A19/10 - F41A19/15, F41A21/48, F41A25/26 take precedence
• CPC Class Codes: F41A 15/14 the ejector being mounted on or within the bolt; Extractors per se
• CPC Class Codes: F41A 17/42 Safeties for locking the breech-block or bolt in a safety position F41A17/32, F41A17/36, F41A17/40 take precedence ; anti-rebound arrangements F41A3/70
• CPC Class Codes: F41A 17/76 automatically operated, i.e. operated by breech opening or closing movement
• CPC Class Codes: F41A 19/43 in bolt-action guns
• CPC Class Codes: F41A 21/485 using screws or bolts
• CPC Class Codes: F41A 3/26 semi-automatically or automatically operated, e.g. having a slidable bolt-carrier and a rotatable bolt
• CPC Class Codes: F41A 3/36 Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing
• CPC Class Codes: F41A 3/66 Breech housings or frames; Receivers
• CPC Class Codes: F41A 3/70 Anti-rebound arrangements, i.e. preventing rebound of the bolt out of the firing position safeties for locking the breech-block or bolt in a safety position F41A17/42
• CPC Class Codes: F41A 5/12 mounted in a gun having a fixed barrel
• CPC Class Codes: F41A 5/18 gas-operated
• CPC Class Codes: F41A 5/24 by direct action of gas pressure on bolt or locking elements

Abstract

A firearm including a bolt for securing a barrel such that the barrel attaches to a receiver with increased repeatability at the same location. The bolt included a tapered end and may also include a threaded section. The receiver comprises a barrel attachment feature which allows the bolt to pass through and can also include threads for engaging the bolt. The barrel comprises a beveled recess for engaging the tapered end of the bolt. The angle of the tapered end and the beveled recess are approximately reciprocal. The bolt passes through the receiver and its tapered end engages the beveled recess to secure the barrel to the receiver.

Claims

1. A firearm comprising:

a barrel comprising a beveled barrel retention recess;

a receiver comprising a barrel attachment feature; and

a barrel attachment device having a tapered end, wherein the angle of the tapered end is about the reciprocal of the angle of the beveled barrel retention recess, wherein a portion of the barrel attachment device is disposed in the barrel attachment feature so that the tapered end engages the beveled barrel retention recess to attach the barrel to the receiver.

2. The firearm in claim 1 wherein the angle of the bevel barrel retention recess ranges from about 170 degrees to about 10 degrees.

3. The firearm in claim 1 wherein the angle of the bevel barrel retention recess ranges from about 120 degrees to about 40 degrees.

4. The firearm in claim 1 wherein the angle of the bevel barrel retention recess ranges from about 90 degrees to about 60 degrees.

5. The firearm of claim 1, wherein the receiver comprises a passageway to receive the barrel, the passageway comprising a substantially cylindrical engaging member to engage and support the barrel.

6. The firearm of claim 1, wherein the barrel attachment device comprises a threaded bolt and the barrel attachment feature comprises a threaded hole to engage the threaded bolt.

7. A firearm, comprising:

a barrel attachment device having a tapered end;

a receiver including a barrel attachment feature for receiving the barrel attachment device and allowing the barrel attachment device to extend through the barrel attachment feature; and

a barrel including a beveled barrel retention recess to receive the barrel attachment device and engage the tapered end.

8. The firearm of claim 7, wherein an angle of the tapered end is about the reciprocal of an angle of the beveled barrel retention recess.

9. A firearm, comprising:

a barrel attachment device having a tapered end;

a receiver including a barrel attachment feature for receiving the barrel attachment device and allowing the barrel attachment device to extend through the barrel attachment feature;

a barrel; and

a barrel extension coupled to the barrel and including a beveled barrel retention recess to receive the barrel attachment device and engage the tapered end.

10. The firearm of claim 9, wherein an angle of the tapered end is about the reciprocal of an angle of the beveled barrel retention recess.

11. The firearm of claim 9, wherein the receiver comprises a passageway to receive the barrel, the passageway comprising a substantially cylindrical engaging member to engage and support the barrel.

12. The firearm of claim 9, wherein the barrel attachment device comprises a threaded bolt and the barrel attachment feature comprises a threaded hole to engage the threaded bolt.

13. A firearm comprising:

a barrel;

a receiver; and

a means for securing the barrel to the receiver.

14. The firearm of claim 13 wherein the barrel comprises a barrel extension.

15. The firearm of claim 14 wherein the barrel further comprises a beveled barrel retention recess disposed within the barrel extension.

16. The firearm of claim 13 wherein the receiver comprises a barrel attachment feature.

17. The firearm of claim 16 wherein the barrel attachment feature comprises a threaded hole.

18. The firearm of claim 17 wherein the means for securing the barrel to the receiver comprises threads configured to engage the threaded hole.