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US 9,939,236 B2Granted
Method of making a casing and cartridge for firearm
AssigneeShell Shock Technologies LLC
InventorsVolodymyr Drobockyi, Anthony Viggiano
Life of this patent
Estimating the term…
Abstract
A casing for use in a cartridge for a firearm comprises a sleeve and attached base. The sleeve is formed with a mouth for holding a bullet and an opposing bulkhead from which extends a nipple. The end of the nipple is flared radially outwardly within a passageway of the base, to form a special configuration lip and first seal. The nipple is shaped to make a second seal when press fitted into the passageway. A bulkhead is formed with a circumferential wave or ridge. A sleeve is preferably made from austenitic stainless steel that is worked to have differential hardness and magnetic properties along the sleeve length, with the nipple being of lesser hardness.
Claims26
A method of making a casing for ammunition which comprises:
- forming a sleeve having a length and a central length axis, the sleeve comprising a lengthwise-extending cylindrical wall having an outer circumferential surface with an associated diameter, the sleeve wall defining a concavity suited for receiving gunpowder propellant, the sleeve having a cylindrical wall, a mouth first end shaped for receiving a bullet, and an opposing second end comprising a circular bulkhead having an outer edge where the bulkhead connects to the lengthwise-extending cylindrical wall, the second end further comprising a nipple extending lengthwise from said bulkhead to a nipple terminal end, the nipple having a bore for enabling flow of propellant gases into said concavity;
- forming a cylindrical base having an outer circumferential surface with an associated diameter, a length and a central length axis, a first end, a second end having a circular surface shaped for mating with the bulkhead of the sleeve, and a passageway having a bore running lengthwise between the first end and the second end of the base, the passageway having a recess at the first end of the base which is larger in diameter than a rest of the passageway, the recess shaped for receiving a primer and defining a circumscribing shoulder within the passageway;
- wherein each of the sleeve and the base has a radial dimension that runs perpendicularly from the respective central length axis thereof;
- mating the sleeve with the base so the nipple is positioned within the passageway of the base;
- pressing axially on the bulkhead within the concavity of the sleeve to push the nipple into the passageway of the base, to put the outer edge of the bulkhead in contact with or in close proximity to the surface of the second end of the base, and to form a first seal within the passageway;
- and,
- pressing axially on the terminal end of the nipple, to form a lip which presses against said shoulder of said recess and which forms a second seal therewith, while leaving the rest of said recess empty in order to receive the primer, wherein the lip decreases in axial thickness with radial distance from the from the central length axis.
4 more elements
A method of making a cartridge for ammunition which comprises:
- forming a sleeve having a length and a central length axis, the sleeve comprising a lengthwise-extending cylindrical wall having an outer circumferential surface with an associated diameter, the sleeve wall defining a concavity suited for receiving gunpowder propellant, the sleeve having a cylindrical wall, mouth first end shaped for receiving a bullet and an opposing second end comprising a circular bulkhead having an outer edge where the bulkhead connects to the lengthwise-extending cylindrical wall, the second end further comprising a nipple extending lengthwise from said bulkhead to a nipple terminal end, the nipple having a bore for enabling flow of propellant gases into said concavity;
- forming a cylindrical base having an outer circumferential surface with an associated diameter, a length and a central length axis, a first end, a second end having a circular surface shaped for mating with the bulkhead of the sleeve, and a passageway having a bore running lengthwise between the first end and the second end of the base, the passageway having a recess at the first end of the base which is larger in diameter than the rest of the passageway, the recess shaped for receiving a primer and defining a circumscribing shoulder within the passageway;
- wherein each of the sleeve and the base has a radial dimension that runs perpendicularly from the respective central length axis thereof;
- mating the sleeve with the base so the nipple is positioned within the passageway of the base;
- pressing axially on the bulkhead within the concavity of the sleeve to push the nipple into the passageway of the base, to form a first seal within the passageway and to put the outer edge of the bulkhead in contact with or in close proximity to the surface of the second end of the base;
- and, pressing axially on the terminal end of the nipple, to form a lip which presses against said shoulder and forms a second seal therewith;
- wherein the lip decreases in axial thickness with radial distance from the from the central length axis.
4 more elements
A method of making a casing that is useful in a cartridge for ammunition which comprises:
- forming a sleeve having a length and a central length axis, the sleeve comprising a lengthwise-extending cylindrical wall having an outer circumferential surface with an associated diameter, the sleeve wall defining a concavity suited for receiving gunpowder propellant, the sleeve having a cylindrical wall, a mouth first end shaped for receiving a bullet and an opposing second end comprising a circular bulkhead having an outer edge where the bulkhead connects to the lengthwise-extending cylindrical wall, the second end further comprising a nipple extending lengthwise from said bulkhead to a nipple terminal end, the nipple having a bore for enabling flow of propellant gases into said concavity;
- forming a cylindrical base having an outer circumferential surface with an associated diameter, a length and a central length axis, a first end, a second end having a circular surface shaped for mating with the bulkhead of the sleeve, and a passageway having a bore running lengthwise between the first end of the base and the second end of the base, the passageway having a recess at the first end of the base which is larger in diameter than a rest of the passageway, the recess shaped for receiving a primer and defining a circumscribing shoulder within the passageway;
- wherein each of the sleeve and the base has a radial dimension that runs perpendicularly from the respective central length axis thereof;
- mating the sleeve with the base so the nipple is positioned within the bore of the passageway of the base, wherein, during mating the nipple has an interference fit with a portion of said bore;
- pressing axially on the bulkhead within the concavity of the sleeve to push the nipple into the bore of passageway of the base, and to put the outer edge of the bulkhead in contact with or in close proximity to the surface of the second end of the base, thereby forming by means of said interference fit a first seal within the bore of the passageway;
- and,
- pressing axially on the terminal end of the nipple, to form a lip which presses against said circumscribing shoulder of said recess and which forms a second seal therewith;
- wherein, the first seal is spaced apart from the second seal by a region where there is no seal between the nipple and the base.
5 more elements
Dependencies are inferred from the claim text.