Roller delayed firearm operating system

Patent metadata

Field	Value
Publication number	US-11371789-B2
Application number	US-202016987204-A
Country	US
Kind code	B2
Filing date	Aug 6, 2020
Priority date	Aug 6, 2019
Publication date	Jun 28, 2022
Grant date	Jun 28, 2022

Abstract

An operating system for a firearm includes a forward bolt includes a forward bolt cavity, a carrier disposed on a rear side of the forward bolt, the carrier including a carrier cavity, a short cam pin including (i) a forward section that is at least partially disposed within the forward bolt cavity and (ii) a rear section that is at least partially disposed within the carrier cavity, a plurality of bearings that interface with the forward bolt, a retracted configuration where the short cam pin is in a rear position relative to the forward bolt, and a deployed configuration where the short cam pin is in a forward position relative to the forward bolt.

First claim

That which is claimed is:

1. A firearm operating system comprising:
a forward bolt comprising an internal cavity;
a carrier disposed on a rear side of the forward bolt, wherein the carrier comprises a cavity;
a short cam pin;
a plurality of bearings;
a retracted configuration; and
a deployed configuration, wherein:
at least a portion of a forward section of the short cam pin is disposed within the internal cavity of the forward bolt;
at least a portion of a rear section of the short cam pin is disposed within a cavity of the carrier;
movement from the retracted configuration to the deployed configuration includes movement in a forward/aft direction of the short cam pin relative to the forward bolt and movement of the plurality of bearings; and
a forward end of the short cam pin comprises a plurality of ramp surfaces that interface with the plurality of bearings when the short cam pin moves relative to the forward bolt.

2. The firearm operating system of claim 1 , wherein, in the retracted configuration, the firearm operating system comprises a gap between an aft face of the forward bolt and a forward face of the carrier.

3. The firearm operating system of claim 1 , wherein the plurality of bearings comprises at least two bearings and the movement of the at least two bearings is in a direction that is perpendicular to the forward/aft direction.

4. The firearm operating system of claim 1 , wherein each of the plurality of bearings comprise:
an internal configuration wherein each bearing is internal to the forward bolt and does not extend beyond an outer surface of the forward bolt; and
an extended configuration wherein at least a portion of each bearing extends beyond an outer surface of the forward bolt.

5. The firearm operating system of claim 1 , wherein the plurality of bearings comprises at least three bearings that interface with the forward bolt and are each configured to move in a radial direction relative to the forward bolt.

6. The firearm operating system of claim 5 , wherein the at least three bearings are spherical ball bearings.

7. The firearm operating system of claim 1 , wherein the plurality of bearings comprises (i) at least two forward bearings that interface with the forward bolt and (ii) a rear bearing disposed within a third bearing cavity of the forward bolt, wherein the third bearing cavity is located on an upper surface of the forward bolt.

8. The firearm operating system of claim 1 , further comprising a long cam pin, wherein the long cam pin extends through the forward bolt and the carrier such that the forward bolt and the carrier can slide along a length of the long cam pin.

9. The firearm operating system of claim 1 , wherein each of the ramp surfaces comprises a curved cross-section designed to interface with a corresponding bearing.

10. The firearm operating system of claim 1 , further comprising at least one buffer spring that extends in the forward/aft direction through at least a portion of the carrier.

11. The firearm operating system of claim 1 , wherein the plurality of bearings comprises at least two cylindrical bearings that interface with the forward bolt and are each configured to move relative to the forward bolt.

12. The firearm operating system of claim 1 , wherein:
the forward bolt comprises a lower rear cavity; and
the carrier comprises a forward protrusion that at least partially extends into the lower rear cavity of the forward bolt.

13. An operating system for a firearm comprising:
a forward bolt comprising a forward bolt cavity;
a carrier disposed on a rear side of the forward bolt, the carrier comprising a carrier cavity;
a short cam pin comprising (i) a forward section that is at least partially disposed within the forward bolt cavity and (ii) a rear section that is at least partially disposed within the carrier cavity;
a plurality of bearings that interface with the forward bolt;
a barrel extension with a plurality of recesses, wherein, when the operating system is in a forward position relative to the firearm, each of the plurality of bearings engage a corresponding recess of the barrel extension;
a retracted configuration where the short cam pin is in a rear position relative to the forward bolt; and
a deployed configuration where the short cam pin is in a forward position relative to the forward bolt.

14. The operating system of claim 13 , wherein movement from the retracted configuration to the deployed configuration includes movement in a forward/aft direction of the short cam pin relative to the forward bolt and movement of the plurality of bearings.

15. The operating system of claim 13 , wherein the barrel extension is threaded onto a barrel of the firearm.

16. The operating system of claim 13 , wherein, in the retracted configuration, the firearm operating system comprises a gap between an aft face of the forward bolt and a forward face of the carrier.

17. The operating system of claim 13 , wherein each of the plurality of bearings comprise:
an internal configuration wherein each bearing is internal to the forward bolt and does not extend beyond an outer surface of the forward bolt; and
an extended configuration wherein at least a portion of each bearing extends beyond an outer surface of the forward bolt.

18. The operating system of claim 13 , wherein the plurality of bearings comprises at least three bearings that interface with the forward bolt and are each configured to move in a radial direction relative to the forward bolt.

19. The operating system of claim 18 , wherein the at least three bearings are spherical ball bearings.

20. The operating system of claim 13 , further comprising a long cam pin, wherein the long cam pin extends through the forward bolt and the carrier such that the forward bolt and the carrier can slide along a length of the long cam pin.

21. The operating system of claim 13 , wherein a forward end of the short cam pin comprises a plurality of ramp surfaces that interface with the plurality of bearings when the short cam pin moves relative to the forward bolt.

22. The operating system of claim 13 , further comprising at least one buffer spring that extends in the forward/aft direction through at least a portion of the carrier.

23. The operating system of claim 13 , wherein the plurality of bearings comprises at least two cylindrical bearings that interface with the forward bolt and are each configured to move relative to the forward bolt.

24. The operating system of claim 13 , wherein:
the forward bolt comprises a lower rear cavity; and
the carrier comprises a forward protrusion that at least partially extends into the lower rear cavity of the forward bolt.

25. An operating system for a firearm comprising:
a forward bolt comprising a forward bolt cavity;
a carrier disposed on a rear side of the forward bolt, the carrier comprising a carrier cavity;
a short cam pin comprising (i) a forward section that is at least partially disposed within the forward bolt cavity and (ii) a rear section that is at least partially disposed within the carrier cavity;
a plurality of bearings that interface with the forward bolt;
a retracted configuration where the short cam pin is in a rear position relative to the forward bolt; and
a deployed configuration where the short cam pin is in a forward position relative to the forward bolt,
wherein a forward end of the short cam pin comprises a plurality of ramp surf

Assignees

• Underwood James Matthew
• Underwood Larry Cullen

Inventors

• Underwood James Matthew
• Underwood Larry Cullen

Classifications

• F41A3/46 Primary

  mounted on the bolt (F41A3/48 takes precedence) · CPC title