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 cartridge casing comprising:
- a base having an end surface and defining a centrally located primer pocket, wherein the base has an axially recessed annular region extending radially outward from the primer pocket, the axially recessed annular region recessed axially with respect to the end surface by at least 0.014″;
- and
- a casing body extending along a central axis from the base to a mouth and defining an inside volume;
- wherein the primer pocket is sized such that when a primer is installed in the primer pocket that a proximal face of the primer is flush with or recessed axially with respect to the axially recessed annular region.
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, wherein the distal end includes a breech face sized and configured to engage a cartridge head;
- a protrusion on the breech face, the protrusion extending axially from the breech face by at least 0.014″, wherein the protrusion is configured to be at least partially received in the cartridge head, and wherein the firing pin bore extends through a distal surface of the protrusion.
In combination, a blank ammunition cartridge and a bolt for an autoloading firearm, the combination comprising:
- a blank ammunition cartridge comprising:
- a cartridge casing having a base having an end surface and defining a centrally located primer pocket, and having a casing body extending along a central axis from the base to a mouth and defining an inside volume, wherein the base has an axially recessed annular region extending radially outward from the primer pocket, the axially recessed annular region recessed axially with respect to the end surface by at least 0.014″;
- a primer installed in the primer pocket such that a proximal face of the primer is flush with or recessed axially with respect to the axially recessed annular region;
- a projectile retained in the mouth of the cartridge casing;
- and
- a quantity of propellant in the inside volume of the cartridge casing;
- and
- a bolt comprising:
- a bolt body extending along a central axis to a distal end, the bolt body defining a firing pin bore, wherein the distal end includes a breech face sized and configured to engage a cartridge head;
- and
- a protrusion on the breech face, the protrusion extending axially from the breech face by a recess distance of at least 0.014″, wherein the protrusion is configured to be at least partially received in the cartridge head, and wherein the firing pin bore extends through a distal surface of the protrusion.
Dependencies are inferred from the claim text.