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US 10,724,837 B2Granted
Breech plug for a preloaded firearm system
AssigneeArdesa, S.A.
InventorThomas F. Hall
Life of this patent
Estimating the term…
Abstract
A sabot having an extended casing for containing propellant charge and a slotted top portion for securing a projectile. The propellant charge is ignited by gases that enter the lower portion of the sabot from a puncture developed by the mating of the sabot against a breech plug. The breech plug has a piercing component in the form of a sharpened forward edge to initiate puncture of the breech end of the sabot.
Claims12
A breech plug for a muzzleloader firearm, the breech plug adapted for use with ammunition having a preloaded sabot, the breech plug comprising:
- a cylindrical body extending from a breech end to a muzzle end along an axial or longitudinal axis, at least a portion of the cylindrical body having a threaded outer surface for removable installation of said breech plug with a corresponding complementary threaded connection of the firearm and for securing said breech plug in a stationary position during triggering of the firearm;
- a nose portion at a muzzle end of the breech plug extending along the longitudinal axis beyond said cylindrical body muzzle end;
- a cavity or pocket at a breech end of the breech plug for receiving a primer cap;
- an internal passage for transporting gas from the primer cap into the barrel through the nose portion of the breech plug, upon firing of the muzzleloader firearm;
- the nose portion having a piercing component for puncturing the preloaded sabot upon final placement of the preloaded sabot into the barrel, said piercing component forming a wedge-shaped structure with a sharp straight edge, or cup-shaped structure having a sharp circumferential edge, or a pin-shaped structure, such that when the muzzleloader firearm is loaded, said piercing component pierces said preloaded sabot, and when the muzzleloader firearm is fired, hot gas from the primer cap is transported through the breech plug, into the punctured preloaded sabot, where a propellant charge is ignited.
2 more elements
A breech plug for a firearm comprising:
- a body extending from a breech end to a muzzle end along a longitudinal axis;
- at least a portion of said body having threaded outer surface for removable installation of said breech plug with a corresponding complementary threaded connection of the firearm for securing said breech plug in a stationary position during triggering of the firearm;
- a nose portion at a muzzle end of the breech plug extending along the longitudinal axis beyond said body muzzle end;
- an internal borehole through at least a portion of the breech plug for transporting gas from a primer cap, upon firing of the firearm, into a barrel;
- the breech plug including a protrusion forming a wedge-shaped structure with a sharp straight edge, or cup-shaped structure having a sharp circumferential edge, or a pin-shaped structure, for puncturing or piercing ammunition upon placement of the ammunition into the barrel, said ammunition having a casing or sabot, such that when the firearm is fired, hot gas from the primer cap is transported through the breech plug internal borehole into the punctured or pierced ammunition casing or sabot.
2 more elements
Dependencies are inferred from the claim text.