Self-locking bolt system not requiring an external surface to lock to
OwnerMark John Rothinventor
Life of this patent
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Abstract
A self-locking bolt assembly is provided having a short stroke allowing the assembly to be contained within the receiver. The assembly has a base plate, a recoil rod with a spring, a bolt body, a bolt and a locking mechanism. The bolt is internally (i.e. lockable onto itself) lockable when the bolt is in battery. The locking mechanism, for example, can be a roller bearing, a lever lock, a cam rotary lock or a roller. The locking mechanism engages to recoil rod and prevents rearward motion of the bolt. Blowback and reciprocation of the bolt are temporarily delayed after a shot is fired until after the bolt is unlocked. Rearward movement of the bolt body due to inertia causes the locking mechanism to be disengaged to unlock the bolt and to allow for reciprocation of the bolt.
Claims10
An assembly for a firearm achieving delayed blowback,
- said assembly comprising:
- a bolt;
- a bolt body having a main cavity and a rod hole, said bolt being received within said main cavity;
- an additional assembly component being a rod, said rod being received within said rod hole;
- and
- a locking mechanism,
- wherein, when said bolt is in battery, said bolt is held in a locked position by having said locking mechanism engage said additional assembly component until said bolt is unlocked as said locking mechanism and said additional assembly component disengage by rearward motion of said bolt body after the firearm is discharged.
An assembly for a firearm achieving delayed blowback, said assembly comprising:
- a base plate;
- a rod;
- a rod spring;
- a bolt;
- a bolt body;
- a locking mechanism;
- and
- a cam pin,
- wherein:
- said rod spring is between said bolt body and said base plate;
- said bolt is received within said bolt body;
- and
- said bolt is lockable relative to said rod in a locked position when said locking mechanism engages said rod until said bolt is unlocked by said locking mechanism and said rod disengaging by motion of said bolt body towards said base plate.
A method of temporarily internally locking a firearm to achieve delayed blowback, the method comprising the steps:
- providing an assembly with a bolt, a bolt body, a locking mechanism and an additional assembly component being a rod, wherein the bolt is received within a main cavity of the bolt body and the additional assembly component is received within a rod hole of the bolt body;
- locking the bolt when the bolt is in battery by locking the bolt with respect to the additional assembly component by having the locking assembly engage the additional assembly component;
- discharging the firearm;
- keeping the bolt locked until inertial movement of the bolt body unlocks the bolt.
Dependencies are inferred from the claim text.