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US 12,747,920 B2Granted
Bearing delayed firearm operating systems
OwnerJames Matthew Underwood, Larry Cullen Underwoodinventors
Life of this patent
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Abstract
A firearm operating system includes a bolt with at least one bearing cavity, a carrier disposed on a rear side of the bolt, a plurality of bearings, and a barrel extension. The carrier includes a cavity. The plurality of bearings are retained in the barrel extension. The plurality of bearings are movable relative to the barrel extension.
Claims21
A firearm operating system comprising:
- a bolt comprising at least one bearing cavity;
- a carrier disposed on a rear side of the bolt, wherein the carrier comprises a cavity;
- a plurality of bearings;
- and
- a barrel extension, wherein:
- the plurality of bearings are retained in the barrel extension during cycling of the firearm operating system including when the bolt is disengaged from the barrel extension;
- and
- the plurality of bearings are movable relative to the barrel extension.
5 more elements
A firearm operating system comprising:
- a bolt comprising a plurality of cavities;
- a plurality of bearings;
- and
- a barrel extension, wherein:
- the plurality of bearings are retained in the barrel extension during cycling of the firearm operating system including when the bolt is disengaged from the barrel extension;
- and
- the plurality of bearings are movable relative to the barrel extension.
4 more elements
A firearm operating system comprising:
- a bolt comprising a plurality of cavities;
- a plurality of bearings;
- a lever arm with a pivot that is approximately centrally located;
- and
- a barrel extension, wherein:
- the plurality of bearings are movable relative to the barrel extension;
- and
- the lever arm constrains movement of the bolt relative to a carrier.
5 more elements
Dependencies are inferred from the claim text.