IP Library › Granted Patent US 12687353
Granted Patent B2
US 12687353 · App. 18/503,893 · Granted Jul 21, 2026

Firearm bolt assembly

Inventors: William H. Geissele (Lower Gwynedd, PA); David Duhaime (Ivyland, PA)
Assignee: WHG PROPERTIES, LLC
F41A3/14
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Quick Facts
Patent No.
US 12687353
App. No.
18/503,893
Granted
Jul 21, 2026
Kind
B2
Abstract

A bolt assembly that includes a bolt defining at least one bolt opening and an extractor that is configured to pivot relative to the bolt. The extractor may define at least one extractor opening. The bolt assembly may include a pin positioned within the at least one bolt opening and the at least one extractor opening. The bolt assembly may include a retainer that is positioned inward relative to an exterior surface of the bolt assembly. The retainer may be removably coupled to the pin.

Claims (39)

1 . A bolt assembly that defines a longitudinal direction and a radial direction that is orthogonal to the longitudinal direction, the bolt assembly comprising:

a bolt defining at least one bolt opening;

an extractor that is configured to pivot relative to the bolt, the extractor defining at least one extractor opening;

a pin positioned within the at least one bolt opening and the at least one extractor opening; and

a retainer that defines a curved portion that extends at least partially around the pin, wherein the retainer is positioned inward relative to an exterior surface of the bolt assembly,

wherein the retainer is removably coupled to the pin.

2 . The bolt assembly of claim 1 , wherein the retainer comprises a circlip.

3 . The bolt assembly of claim 1 , wherein the retainer has a straight portion.

4 . The bolt assembly of claim 3 , wherein the curved portion is positioned away from the pin, and wherein the straight portion is positioned directly on the pin.

5 . The bolt assembly of claim 3 , wherein the extractor comprises a slot, and wherein the straight portion of the retainer is an arm that is positioned at least partially within the slot of the extractor.

6 . The bolt assembly of claim 5 , wherein the arm extends thirty degrees or less relative to the longitudinal direction.

7 . The bolt assembly of claim 1 , wherein the retainer is configured to exert a radial force on the extractor relative to an axis defined by the pin.

8 . The bolt assembly of claim 1 , wherein the pin defines a groove, wherein the retainer is at least partially positioned within the groove.

9 . The bolt assembly of claim 1 , wherein the extractor defines a recessed portion, wherein the retainer is at least partially positioned within the recessed portion.

10 . The bolt assembly of claim 9 , wherein the recessed portion defines an annular portion that has an annular shape and a bump feature that deviates from the annular shape.

11 . The bolt assembly of claim 9 , wherein the recessed portion of the extractor defines a retainment feature configured to engage the retainer.

12 . The bolt assembly of claim 11 , wherein the retainment feature has a cross-sectional dovetail shape or T-shape.

13 . The bolt assembly of claim 1 , wherein the bolt defines a channel that extends at least partially around the at least one bolt opening, wherein the retainer is at least partially positioned within the channel.

14 . A firearm comprising the bolt assembly of claim 1 .

15 . A bolt assembly that defines a longitudinal direction and a radial direction that is orthogonal to the longitudinal direction, the bolt assembly comprising:

a bolt defining at least one bolt opening;

an extractor that is configured to pivot relative to the bolt, the extractor defining at least one extractor opening;

a pin positioned within the at least one bolt opening and the at least one extractor opening;

a first retainer that is positioned inward relative to an exterior surface of the bolt assembly,

wherein the first retainer is removably coupled to the pin; and

a second retainer that is removably coupled to the pin.

16 . A method of assembling a bolt assembly, the method comprising:

positioning an extractor and a retainer within an orifice of a bolt such that an entirety of the retainer is positioned between the extractor and the bolt; and

inserting a pin into at least one bolt opening of the bolt, into at least one extractor opening of the extractor, and through the retainer.

17 . The method of claim 16 , further comprising positioning the retainer within a recessed portion of the extractor prior to positioning the extractor and the retainer within the orifice of the bolt.

18 . The method of claim 17 , further comprising positioning an arm of the retainer within a slot of the extractor.

19 . The method of claim 16 , further comprising:

positioning a second retainer within a channel of the bolt; and

inserting the pin through the second retainer.

20 . A bolt assembly comprising:

a bolt defining at least one bolt opening;

an extractor that is configured to pivot relative to the bolt, the extractor defining at least one extractor opening;

a pin positioned within the at least one bolt opening and the at least one extractor opening; and

a means for retaining the pin within the bolt assembly, wherein the means for retaining the pin defines a curved portion that extends at least partially around the pin and is positioned inward relative to an exterior surface of the bolt assembly.