Recoil spring for a firearm

Patent metadata

Field	Value
Publication number	US-9897404-B2
Application number	US-201615215582-A
Country	US
Kind code	B2
Filing date	Jul 20, 2016
Priority date	Mar 18, 2016
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

A firearm includes a receiver for housing a trigger mechanism. The receiver is attached to a firearm barrel, and the receiver includes a bolt carrier that is configured to reciprocate therein. The firearm includes a recoil spring that has a first end and a second end, and the first end interfaces with the bolt carrier. The recoil spring further includes a dampened portion positioned between the first and second ends. The dampened portion has a plurality of dead spring coils. The firearm also includes a spring retainer that is configured to retain the recoil spring within the firearm.

First claim

What is claimed is:

1. A firearm comprising:
a receiver for housing a trigger mechanism, the receiver being attached to a firearm barrel, the receiver including a bolt carrier configured to reciprocate therein;
a recoil spring having a first end and a second end, the first end interfacing with the bolt carrier, the recoil spring further including a dampened portion positioned between the first and second ends, the dampened portion having a plurality of inactive spring coils, wherein the dampened portion is abutted on both sides by active coils; and
a spring retainer being configured to retain the recoil spring within the firearm.

2. The firearm of claim 1 , wherein the spring retainer is a spring guide that includes a base and a spring guide rod, the spring guide rod being positioned within the spring, and the base being mounted to the receiver, and wherein the second end of the recoil spring interfaces with the base.

3. The firearm of claim 1 , wherein the recoil spring includes between about two and about four inactive coils.

4. The firearm of claim 1 , wherein the dampened portion of the recoil spring is positioned about halfway between the first and second ends of the recoil spring.

5. The firearm of claim 1 , wherein the recoil spring is manufactured from chrome silicon steel.

6. The firearm of claim 1 , wherein the recoil spring has a free length of between about 17 inches and about 17.125 inches.

7. A recoil spring assembly for a firearm comprising:
a spring guide having a base and a spring guide rod, the spring guide rod being attached at and extending away from the base, wherein the base is configured to be mounted to a firearm; and
a recoil spring being positioned around the spring guide rod, the recoil spring having a first end and a second end, the first end being retained around the spring guide rod by way of a fastener secured to the spring guide rod, and the second end of the recoil spring interfacing with the base of the spring guide, the recoil spring further including a dampened portion positioned between the first and second ends, wherein the dampened portion includes a plurality of inactive spring coils, and wherein the dampened portion is abutted on both sides by active coils.

8. The assembly of claim 7 , wherein the recoil spring includes between about two and about four inactive coils.

9. The assembly of claim 7 , wherein the dampened portion of the recoil spring is positioned about halfway between the first and second ends of the recoil spring.

10. The assembly of claim 7 , wherein the recoil spring is manufactured from chrome silicon steel.

11. The assembly of claim 7 , wherein the recoil spring has a free length of between about 17 inches and about 17.125 inches.

Assignees

• Whg Properties Llc

Inventors

• Geissele William H

Classifications

• F41A3/66

  Breech housings or frames; Receivers · CPC title

• F41A3/86 Primary

  mounted under {or above} the barrel · CPC title

• F41A3/54

  Bolt locks of the unlocked type, i.e. being inertia operated · CPC title

• F41A3/82 Primary

  Coil spring buffers (F41A3/80 takes precedence) · CPC title