Blank-firing device with anti-tampering features
OwnerRobert Bowerinventor
Life of this patent
Estimating the term…
Abstract
The disclosed device is based on the Thompson submachine gun. The disclosed device is specifically designed to only fire blanks, or a firearm cartridge that contains gunpowder but no bullet, shot, or projectile. Blanks can be fired in fully automatic fashion, just as a standard machine gun. Numerous features are disclosed that prevent the disclosed device from being modified to fire live cartridges. The result is a blank-firing device with the appearance of a genuine firearm, while being unable to fire live cartridges, and thus not regulated by state or federal laws, or regulations to possess, use, and/or transfer.
Claims19
A device that fires blank cartridges and cannot be modified to fire live rounds, the device comprising:
- a. a receiver;
- the receiver including
- i. a female-threaded connection;
- ii. a front wall, two side walls, and a back wall that form a bolt pocket having a length and a width;
- iii. a plurality of anti-machining pins embedded within the front wall and two side walls of the receiver;
- iv. whereby the anti-machining pins prevent alteration of the length or width of the bolt pocket;
- b. a bolt, the bolt including:
- i. a bolt body with a cuboid shape;
- ii. a bolt head with a cylindrical shape;
- iii. the bold head extending from an end of the bolt body;
- iv. the bolt body slidably interfacing with the bolt pocket;
- c. a barrel, the barrel including;
- i. a bore that is continuous through the barrel;
- ii. an internal barrel web that partially obstructs the bore, preventing the passage of a projectile but permitting the passage of gas;
- iii. a male-threaded connection;
- 1. the male-threaded connection joined to the female-threaded connection of the receiver;
- d. wherein the combination of the receiver, bolt, and barrel mounted on a lower gun half that includes a grip, trigger housing, and butt stock, thereby forming an operable device.
A replica firearm that cannot be modified to fire cartridges having projectiles, the replica firearm comprising:
- a. a receiver slidably interfaced to a bolt;
- i. the bolt sliding within a bolt pocket;
- ii. the bolt pocket formed by two side walls, a front wall, and a back wall;
- b. a barrel;
- i. the barrel including a bore for the passage of gas after firing;
- ii. the bore partially obstructed by an internal web to prevent the passage of a projectile;
- iii. the barrel connected to the receiver at a threaded connection;
- c. a multiplicity of anti-machining pins;
- i. the anti-machining pins constructed from hardened steel to resist cutting;
- ii. multiple anti-machining pins embedded within the two side walls and front wall of the bolt pocket, thereby preventing any increase in size of the bolt pocket;
- iii. multiple anti-machining pins embedded within the barrel adjacent to the threaded connection;
- iv. multiple anti-machining pins embedded within the receiver adjacent to the threaded connection;
- d. the replica firearm including a trigger mechanism, handgrip, and stock, to form a functioning device.
A device that permits the modification of a machinegun, thereby restricting the machinegun to fire only blank cartridges, and preventing further modification to permit firing of live cartridges, the device comprising:
- a. trigger housing with trigger and grip;
- b. a receiver slidably connected to the trigger housing;
- c. a bolt within a bolt pocket within the receiver;
- the bolt pocket having a length and a width;
- d. a barrel permanently affixed to an end of the receiver;
- e. a butt stock affixed to the trigger housing;
- f. a plurality of anti-machining pins formed from hardened steel to resist cutting;
- i. one of more of the plurality of anti-machining pins placed within the receiver to prevent alteration of the length and width of the bolt pocket;
- ii. one or more of the plurality of anti-machining pins placed within the barrel proximal to the receiver to prevent the barrel from being cut off the receiver;
- iii. one or more of the plurality of anti-machining pins placed within the receiver proximal to the barrel to prevent the receiver from being cut to remove the barrel.
Dependencies are inferred from the claim text.