Follower and methods for weapons magazine

Patent metadata

Field	Value
Publication number	US-9429378-B2
Application number	US-201514945985-A
Country	US
Kind code	B2
Filing date	Nov 19, 2015
Priority date	Jan 29, 2015
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

A follower for a firearm magazine is provided. In some embodiments, the follower has: a platform shaped to interface with a firearm cartridge; a first side face extending longitudinally from the platform and having a first end opposing the platform; and a second side face extending longitudinally from the platform and having a second end opposing the platform. The first side face and the second side face may define a receiving space for receiving at least a portion of a magazine spring. At least one of the first end and the second end may have a nonlinear profile shaped to translate a lateral spring force into a longitudinal spring force.

First claim

What is claimed is:

1. A follower for a firearm magazine, the follower comprising:
a platform configured to interface with a firearm cartridge;
a first side face extending longitudinally from the platform and having a first end opposing the platform; and
a second side face extending longitudinally from the platform and having a second end opposing the platform; wherein
the first side face and the second side face define a receiving space for receiving at least a portion of a magazine spring; and
at least one of the first end and the second end has a nonlinear profile extending less than halfway into the at least one of the first side face and the second side face, the nonlinear profile having a concave curve that is at least half as wide as the at least one of the first side face and the second side face, whereby the nonlinear profile is configured to translate a lateral spring force into a longitudinal spring force.

2. The follower of claim 1 , further comprising:
at least one wall defining the first side face, the second side face, and a back face, the back face comprising a third end opposing the platform, and wherein
at least one of the first end, the second end, and the third end comprises a spring deflector shaped to deflect a spring from catching on the follower.

3. The follower of claim 2 , wherein:
the spring deflector comprises a recessed face shaped to translate a lateral spring force into a longitudinal spring force.

4. The follower of claim 2 , wherein:
the spring deflector comprises at least one of a relief entry, an angled lead-in, a bevel, a chamfer, a crimped region, a convex bevel, a concave bevel, a convex chamfer, a concave chamfer, a chisel, a concave chisel, a convex chisel, and a compound bevel.

5. The follower of claim 1 , wherein:
at least one of the first end and the second end comprises a spring deflector shaped to deflect a spring from catching on the at least one of the first end and the second end.

6. The follower of claim 5 , wherein:
the spring deflector comprises a recessed face shaped to translate a lateral spring force into a longitudinal spring force.

7. The follower of claim 6 , wherein:
the spring deflector comprises at least one of a relief entry, an angled lead-in, a bevel, a chamfer, a crimped region, a convex bevel, a concave bevel, a convex chamfer, a concave chamfer, a chisel, a concave chisel, a convex chisel, and a compound bevel.

8. The follower of claim 5 , wherein:
the at least one of the first end and the second end comprises a nonlinear profile, the nonlinear profile comprising a concave portion; and
the concave portion comprises the spring deflector.

9. A follower for a firearm magazine, the follower comprising:
a cartridge interface configured to support a cartridge in a firearm magazine;
a magazine housing interface configured to orient the follower relative to the firearm magazine; and
a magazine spring receiving space configured to receive at least a portion of a magazine spring, at least a portion of the magazine spring receiving space comprising a nonlinear end profile extending less than halfway into the receiving space, the nonlinear end profile configured to translate a lateral spring force into a longitudinal spring force.

10. The follower of claim 9 , wherein:
the nonlinear end profile comprises at least one concave region.

11. The follower of claim 9 , wherein:
at least a portion of the magazine housing interface comprises a spring deflector shaped to deflect the spring from catching on the magazine housing interface.

12. The follower of claim 9 , wherein:
at least a portion of the magazine housing interface comprises a spring deflector, the spring deflector comprising a recessed face shaped to translate a lateral spring force into a longitudinal spring force.

13. The follower of claim 9 , wherein:
at least a portion of the magazine housing interface comprises a relief entry shaped to deflect a spring from catching on the magazine housing interface.

14. A method of using a follower for a firearm magazine, the method comprising:
providing a follower in a firearm magazine, the follower having a cartridge interface, a magazine housing interface, and a magazine spring receiving space configured to receive at least a portion of a magazine spring, at least a portion of the magazine housing interface comprising a plurality of interior faces and a nonlinear end profile extending less than halfway into the magazine receiving space, the nonlinear end profile configured shaped to deflect the magazine spring from catching on the follower;
causing the follower to interface with a cartridge, a magazine housing, and a magazine spring; and
loading the firearm magazine such that the follower compresses the magazine spring and the nonlinear end profile deflects the magazine spring from catching on the nonlinear end profile, and translates lateral spring forces into a longitudinal spring force.

15. The method of claim 14 , wherein:
loading the firearm magazine comprises allowing a concave region in the nonlinear end profile to deflect the magazine spring.

16. The method of claim 14 , wherein loading the firearm comprises at least one of:
allowing a recessed face in at least one of the plurality of interior faces to deflect the spring from catching on the magazine housing interface;
allowing a recessed face in at least one of the plurality of interior faces to translate a lateral spring force into a longitudinal spring force; and
allowing a concave region in the nonlinear end profile to translate a lateral spring force into longitudinal spring force.

17. A method of making a follower for a firearm, the method comprising:
providing a platform configured to interface with a firearm cartridge;
shaping a first side face extending longitudinally from the platform and having a first end opposing the platform; and
shaping a second side face extending longitudinally from the platform and having a second end opposing the platform;
shaping the first side face and the second side face to define a receiving space for receiving at least a portion of a magazine spring; and
shaping a nonlinear profile in at least one of the first end and the second end, so that the nonlinear profile is configured to translate a lateral spring force into a longitudinal spring force.

18. The method of claim 17 , further comprising:
providing a back wall coupling at least a portion of the first side face to at least a portion of the second side face, the back wall comprising a third end opposing the platform;
shaping the back wall for engagement with an interior of a firearm magazine housing; and
shaping a recessed face in at least one of the first end, the second end, and the third end to deflect a spring from catching on the follower;
wherein shaping a recessed face comprises at least one of crimping, chamfering, and beveling at least a portion of the at least one of the first end, the second end, and the third end.

19. The method of claim 17 , comprising:
shaping a recessed face in at least one of the first end and the second end to configure the at least one of the first end and the second end to deflect a spring from catching on the at least one of the first end the second end;
wherein shaping a recessed face comprises at least one of chamfering and beveling at least a portion of the at least one of the first end and the second end.

Assignees

• Magpul Ind Corp

Inventors

• Bennett William Bradley
• Kielsmeier Nicholas
• Mayberry Michael T
• Nakayama Brian L
• Nuss Felix

Classifications

• B23P15/22

  cartridges or like shells · CPC title

• F41A9/70 Primary

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