Roller delayed firearm operating system
View Patent ↗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.
1. A firearm operating system configured for a semi-automatic firearm, the firearm operating system comprising:
a bolt comprising a rear cavity;
a plurality of bearings disposed at least partially within the bolt;
a carrier disposed on a rear side of the bolt, the carrier comprising a forward cavity; and
a cam pin comprising a forward section and a rear section, wherein:
the forward section of the cam pin is disposed within the rear cavity of the bolt; and
the forward section of the cam pin comprises a plurality of forward surfaces that each correspond to one of the plurality of bearings.
2. The firearm operating system of claim 1 , wherein each of the plurality of bearings comprises at least one selected from the group of a cylindrical shape or a spherical shape.
3. The firearm operating system of claim 1 , wherein each of the plurality of bearings moves in a radial direction of the bolt.
4. The firearm operating system of claim 1 , wherein:
the plurality of bearings comprises three bearings; and
the bolt comprises three cavities distributed around a perimeter of the bolt such that each bearing moves relative to the bolt through the respective cavity.
5. The firearm operating system of claim 4 , further comprising a retracted bearing configuration and a deployed bearing configuration, wherein:
in the retracted bearing configuration the bearings are biased toward a center of the bolt and do not extend beyond an outer surface of the bolt; and
in the deployed bearing configuration the bearings are biased away from the center of the bolt and do at least partially extend beyond the outer surface of the bolt.
6. The firearm operating system of claim 4 , wherein each cavity comprises a retaining portion that prevents the bearing from passing entirely through the cavity.
7. The firearm operating system of claim 1 , wherein the bolt comprises an extractor and an ejector that are both disposed at a forward face of the bolt.
8. The firearm operating system of claim 7 , wherein the bolt comprises a coil spring for the extractor and a coil spring for the ejector.
9. The firearm operating system of claim 1 , further comprising a barrel extension comprising a plurality of recesses that each corresponds to one of the plurality of bearings.
10. The firearm operating system of claim 1 , wherein each of the forward surfaces is oblique relative to a forward/aft direction of the firearm operating system.
11. A firearm operating system comprising:
a bolt comprising a rear cavity;
a plurality of bearings disposed at least partially within the bolt;
a deployed configuration where the plurality of bearings hold the bolt in battery; and
a plurality of forward surfaces that each corresponds to one of the plurality of bearings, wherein:
rearward movement of the bolt causes the plurality of bearings to move relative to the bolt such that the firearm operating system moves out of the deployed configuration; and
each of the forward surfaces is not perpendicular relative to a forward/aft direction of the firearm operating system.
12. The firearm operating system of claim 11 , further comprising a cam pin comprising a forward section and a rear section, wherein the cam pin is disposed between the bolt and a carrier.
13. The firearm operating system of claim 12 , wherein:
the rear section of the cam pin is disposed within a forward cavity of the carrier; and
the forward section of the cam pin interacts with the plurality of bearings.
14. The firearm operating system of claim 11 , wherein each of the plurality of bearings comprises at least one selected from the group of a cylindrical shape or a spherical shape.
15. The firearm operating system of claim 11 , wherein each of the plurality of bearings moves in a radial direction of the bolt.
16. The firearm operating system of claim 11 , wherein:
the plurality of bearings comprises three bearings; and
the bolt comprises three cavities distributed around a perimeter of the bolt such that each bearing moves relative to the bolt through the respective cavity.
17. The firearm operating system of claim 11 , wherein the bolt comprises an extractor and an ejector that are both disposed at a forward face of the bolt.
18. The firearm operating system of claim 17 , wherein the bolt comprises a coil spring for the extractor and a coil spring for the ejector.
19. The firearm operating system of claim 11 , further comprising a barrel extension comprising a plurality of recesses that each corresponds to one of the plurality of bearings.
20. The firearm operating system of claim 19 , wherein the barrel extension comprises threads for attaching to a barrel.