Ammunition blank and corresponding bolt
AssigneeSig Sauer, Inc.
InventorsJacqueline K. McNally, Johnathon M. Hall, Virgil L. White
Life of this patent
Estimating the term…
Abstract
An ammunition cartridge casing has a casing base with a proximal end surface, a casing body defining an inside volume, and a distal end portion. The casing base defines a primer pocket in communication with the inside volume of the casing body, where the primer pocket is sized and configured such that when a primer is installed in the primer pocket, a proximal face of the primer is recessed into the base at least 0.010″ with respect to the end surface. Blank ammunition made with the cartridge casing is configured for use with a rifle having a bolt with a boss on the breech face that corresponds to the recessed primer.
Claims20
A blank ammunition cartridge casing comprising:
- a casing base with a proximal end surface;
- a casing body defining an inside volume;
- and
- a distal end portion, wherein the casing base defines a primer pocket in communication with the inside volume of the casing body, the primer pocket sized such that when a primer is installed in the primer pocket, a proximal face of the primer is recessed into the base at least 0.010″ with respect to the proximal end surface.
A bolt for a firearm, the bolt comprising:
- a bolt body extending along a central axis to a distal end, the bolt body defining a firing pin bore and a transverse bore, wherein the distal end includes a breech face;
- lugs interspersed circumferentially around the breech face on the distal end of the bolt body, each of the lugs extending axially and protruding radially from the bolt body;
- and
- a protrusion on the breech face, the protrusion extending axially from the breech face by at least 0.010″ wherein the firing pin bore extends through the protrusion.
In combination, a blank ammunition cartridge and a bolt for an autoloading firearm, the combination comprising:
- a blank ammunition cartridge comprising:
- cartridge casing having a casing base with a proximal end surface, a casing body defining an inside volume, and a distal end portion, wherein the casing base defines a primer pocket in communication with the inside volume of the casing body;
- a primer installed in the primer pocket, wherein a proximal face of the primer is recessed into the base by a recess distance of at least 0.010″ with respect to the end surface of the casing base;
- and
- a propellant within the casing body;
- and
- a bolt comprising:
- a bolt body extending along a central axis to a distal end, the bolt body defining a firing pin bore and a transverse bore, wherein the distal end includes a breech face;
- lugs interspersed circumferentially around the breech face on the distal end of the bolt body, each of the lugs extending axially and protruding radially from the bolt body;
- and
- a boss on the breech face, the boss extending axially from the breech face by the recess distance ±0.001″, wherein the firing pin bore extends through the boss.
Dependencies are inferred from the claim text.