Magazine for rimmed ammunition

Patent metadata

Field	Value
Publication number	US-11913748-B2
Application number	US-202217699602-A
Country	US
Kind code	B2
Filing date	Mar 21, 2022
Priority date	Mar 21, 2022
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

A magazine for rimmed cartridges includes a magazine tube having first left and right ribs on an inside of the magazine tube extend inward from a forward portion of opposite sidewalls and are laterally spaced by a first spacing. Second left and right ribs on an inside of the magazine tube extend inward from a rear portion of opposite sidewalls and are laterally spaced by a second spacing that is greater than the first spacing. When the magazine is filled to capacity with rimmed cartridges, cartridges in the magazine are arranged in two offset columns with projectiles of the rimmed cartridges laterally spaced from a median plane by a first distance and rims of the rimmed cartridges laterally spaced from the median plane by a second distance that is greater than the first distance. Also disclosed is a baseplate that attaches to a magazine tube using a snap fit.

First claim

What is claimed is:

1. A magazine for rimmed cartridges, the magazine comprising:
a magazine tube extending linearly along a central axis from a bottom end to a top end, the magazine tube having a front tube wall, a rear tube wall, a left tube sidewall, and a right tube sidewall;
a first left rib and a first right rib extending along an inside of the magazine tube in an opposed relationship, wherein the first left rib extends inward from a forward portion of the left tube sidewall and the first right rib extends inward from a forward portion of the right tube sidewall, and wherein the first left rib and the first right rib are laterally spaced by a first spacing; and
a second left rib and a second right rib extending along an inside of the magazine tube in an opposed relationship, wherein the second left rib extends inward from a rear portion of the left tube sidewall and the second right rib extends inward from a rear portion of the right tube sidewall, wherein the second left rib and the second right rib are laterally spaced by a second spacing that is greater than the first spacing;
wherein when the magazine is filled to capacity with rimmed cartridges, the magazine includes a stack of rimmed cartridges arranged in two offset columns with the rimmed cartridges in the two offset columns being directed inward towards a median plane, and wherein an axis through each of the rimmed cartridges extends upward at a pitch angle from 15° to 25° with respect to a horizontal when the front tube wall is oriented vertically.

2. The magazine of claim 1 , wherein when filled to capacity, projectiles of the rimmed cartridges are arranged in two offset columns along the front tube wall of the magazine tube.

3. The magazine of claim 1 , wherein when filled to capacity, except for a top-most cartridge, each cartridge in the magazine contacts an adjacent higher cartridge in the stack near a mouth of a cartridge casing of the adjacent higher cartridge.

4. The magazine of claim 1 , wherein when filled to capacity, except for a top-most cartridge, a projectile of each cartridge in the magazine contacts a casing of an adjacent higher cartridge in the stack near a mouth of the cartridge casing of the adjacent higher cartridge.

5. The magazine of claim 1 , wherein all of the rimmed cartridges have a parallel orientation as viewed from a side of the magazine.

6. The magazine of claim 1 , wherein the first left rib and the first right rib contact shell casings adjacent a mouth of the shell casings in the stack and the second left rib and the second right rib contact a rear portion of shell casings in the stack.

7. The magazine of claim 6 , wherein the rear portion of the shell casings is adjacent the rim of the shell casings.

8. The magazine of claim 1 , wherein when filled to capacity, a rim of each of the rimmed cartridges is inclined to the rear tube wall.

9. The magazine of claim 1 , wherein, except for the top-most cartridge, each cartridge in the magazine extends inward toward the median plane at a yaw angle from 2-4°.

10. The magazine of claim 1 , wherein the top-most cartridge is centered between the left tube sidewall and the right tube sidewall and is aligned along a central median plane.

11. The magazine of claim 1 , wherein the pitch angle is from 18° to 22°.

12. The magazine of claim 11 , wherein the axis through each cartridge in the magazine defines a yaw angle in a range from 2° to 5° or from −2° to −5° with respect to the median plane.

13. The magazine of claim 12 , where the yaw angle is about +3° or about −3°.

14. The magazine of claim 1 , further comprising a baseplate configured to attach to the magazine tube using a snap fit, the baseplate having a base and tabs extending up from opposite sides of the base, wherein the tabs are configured to extend along an outside of the magazine tube.

15. A magazine comprising:
a magazine tube extending along a magazine axis from a lower end portion to a top end portion defining feed lips; and
a baseplate configured to attach to be installed in a direction along the magazine axis onto the lower end portion of the magazine tube using a snap fit, the baseplate having a base and tabs extending up from opposite sides of the base and configured to extend along an outside of the lower end portion of the magazine and snap in to a recesses defined in a side of the magazine tube when the baseplate is installed on the magazine tube.

16. The magazine of claim 15 , wherein the base of the baseplate
has a planar geometry.

17. The magazine of claim 16 , wherein a bottom end of the magazine tube defines a recessed region sized and configured to receive the base of the baseplate so that the base is recessed into or flush with the bottom end of the magazine tube.

18. The magazine of claim 15 , wherein each side of the lower end portion define a recess sized and configured to receive one of the tabs of the baseplate so that each tab is recessed into or is flush with a side the outside surface of the lower end portion.

19. The magazine of claim 15 , wherein the magazine tube has a front tube wall, a rear tube wall, a left tube sidewall, and a right tube sidewall and the magazine further comprising:
a first left rib and a first right rib extending along the magazine axis on an inside of the magazine tube in an opposed relationship, wherein the first left rib extends inward from a forward portion of the left tube sidewall and the first right rib extends inward from a forward portion of the right tube sidewall, and wherein the first left rib and the first right rib are laterally spaced by a first spacing; and
a second left rib and a second right rib extending along the magazine axis on an inside of the magazine tube in an opposed relationship, wherein the second left rib extends inward from a rear portion of the left tube sidewall and the second right rib extends inward from a rear portion of the right tube sidewall, wherein the second left rib and the second right rib are laterally spaced by a second spacing that is greater than the first spacing;
wherein when the magazine is filled to capacity with rimmed cartridges, the magazine includes a stack of rimmed cartridges arranged in two offset columns with the rimmed cartridges in the two offset columns being directed inward towards a median plane.

20. The magazine of claim 19 , wherein a longitudinal axis through each of the rimmed cartridges extends upward at a pitch angle from 15° to 25° with respect to a horizontal when the front tube wall is oriented vertically.

Assignees

• Sig Sauer Inc

Inventors

• Rainaud Tyler
• Taylor Matthew A

Classifications

• F41A9/69 Primary

  characterised by multiple-row or zigzag arrangement of cartridges · CPC title

• F41A9/70

  Arrangements thereon for discharging, e.g. cartridge followers or discharge throats · CPC title