FIREARM MAGAZINE

• US 20130291419A1
• Filed: 07/10/2013
• Published: 11/07/2013
• Est. Priority Date: 03/08/2007
• Status: Active Grant

• Current Assignee: Browning Corporation (Prosteel Security Holdings Inc)
• Original Assignee: Browning Corporation (Prosteel Security Holdings Inc)
• Inventors: Heath, Marcus A.
• Granted Patent: US 8,745,912 B2
• Time in Patent Office: Days
• US Class Current: 42/50
• CPC Class Codes: F41A 9/64 for unbelted ammunition
• CPC Class Codes: F41A 9/65 Box magazines having a cartridge follower
• CPC Class Codes: F41A 9/70 Arrangements thereon for discharging, e.g. cartridge followers or discharge throats
• CPC Class Codes: F41A 9/73 Drum magazines

Abstract

A magazine for a firearm may include a cavity that is shaped to prevent the tip of the bullets in the cartridges from contacting the magazine when the firearm recoils. The magazine may also be configured so that the cartridges in the magazine exit the cavity at least approximately in the center of the magazine. The magazine may be configured to include a biasing mechanism that pushes the cartridges upward in the cavity. The biasing mechanism may be configured to allow the magazine to be compact, simple, and reliable.

Claims

1. A magazine for a firearm comprising:

a cavity sized to receive a plurality of cartridges, each cartridge including a bullet coupled to a case having a shoulder, the cavity including opposing walls that contact opposite sides of the shoulder of each cartridge to prevent each cartridge from moving forward longitudinally and contacting a front wall of the magazine as each cartridge moves vertically within the cavity;

wherein the magazine is a rotary magazine; and

wherein the magazine is insertable upward into an underside of the firearm.

2. The magazine of claim 1 wherein the magazine is configured so that the plurality of cartridges exit the cavity in the center of the magazine.

3. The magazine of claim 1 wherein all of the plurality of cartridges are positioned so that each preceding cartridge is above the next succeeding cartridge when the magazine is fully loaded.

4. The magazine of claim 1 comprising a movable member positioned in the cavity, the movable member being configured to rotate and push the plurality of cartridges out of the cavity.

5. The magazine of claim 4 wherein the movable member includes a flat plate that rotates and pushes the plurality of cartridges out of the cavity.

6. The magazine of claim 4 wherein the movable member rotates about an axis that is offset to the side of a center line extending vertically though the center of the magazine.

7. The magazine of claim 1 wherein the magazine is no more than 32 mm wide.

8. The magazine of claim 1 wherein the plurality of cartridges are centerfire cartridges.

9. A firearm including the magazine of claim 1 coupled to the underside of the firearm.

10. The magazine of claim 1 comprising retaining edges that hold the plurality of cartridges in the cavity when the magazine is separate from the firearm.

11. A magazine for a firearm comprising:

a cavity sized to receive a plurality of cartridges, each cartridge including a bullet coupled to a case, the cavity including opposing walls that contact opposite sides of the case of each cartridge to prevent each cartridge from moving forward longitudinally and contacting a front wall of the magazine while each cartridge moves vertically within the cavity; and

retaining edges contacting opposing sides of each of the plurality of cartridges, the retaining edges preventing the plurality of cartridges from coming out the top of the cavity when the magazine is separate from the firearm;

wherein the magazine is configured to require the plurality of cartridges to exit in the center of the magazine; and

wherein the magazine is configured to be inserted upward into an underside of the firearm.

12. The magazine of claim 11 wherein each of the plurality of cartridges includes a bullet coupled to a case having a shoulder, and the cavity includes opposing walls that contact opposite sides of the shoulder of each cartridge to prevent the bullets from moving forward longitudinally and contacting the magazine.

13. The magazine of claim 11 wherein all of the plurality of cartridges are positioned so that each preceding cartridge is above the next succeeding cartridge when the magazine is fully loaded.

14. The magazine of claim 11 comprising a movable member positioned in the cavity, the movable member being configured to rotate and push the plurality of cartridges out of the cavity.

15. The magazine of claim 14 wherein the movable member includes a flat plate that rotates and pushes the plurality of cartridges out of the cavity.

16. The magazine of claim 14 wherein the movable member rotates about an axis that is offset to the side of a center line extending vertically though the center of the magazine.

17. The magazine of claim 11 wherein the magazine is configured so that the plurality of cartridges exit the cavity in the center of the magazine.

18. The magazine of claim 11 wherein the magazine is configured so that the plurality of cartridges are received by moving the plurality of cartridges downward and rearward into the cavity and under the retaining edges.

19. The magazine of claim 11 wherein the plurality of cartridges are directed out of the magazine longitudinally by the retaining edges when the magazine is mounted to the firearm.

20. The magazine of claim 11, wherein the retaining edges require insertion of the plurality of cartridges into the cavity with sliding movement in a longitudinal direction under the retaining edges.

21. A magazine for a firearm comprising:

a cavity sized to receive a plurality of cartridges; and

a movable member positioned in the cavity, the movable member being configured to rotate and push the plurality of cartridges out of the cavity;

wherein the movable member rotates about an axis that is offset to the side of a center line extending vertically though the center of the magazine.

22. The magazine of claim 21 wherein each of the plurality of cartridges includes a bullet coupled to a case having a shoulder, and the cavity includes opposing walls that contact opposite sides of the shoulder of each cartridge to prevent the bullets from moving forward longitudinally and contacting the magazine.

23. The magazine of claim 21 wherein all of the plurality of cartridges are positioned so that each preceding cartridge is above the next succeeding cartridge when the magazine is fully loaded.

24. The magazine of claim 21 comprising retaining edges that hold the plurality of cartridges in the cavity when the magazine is separate from the firearm.

25. The magazine of claim 21 wherein the movable member includes a flat plate that rotates and pushes the plurality of cartridges out of the cavity.

26. The magazine of claim 21 wherein the plurality of cartridges are centerfire cartridges.