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US 9,188,412 B2Granted
Polymeric ammunition casing geometry
AssigneeMac, LLC
InventorsNikica Maljkovic, John Francis Bosarge, Joe Paul Gibbons
Life of this patent
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Abstract
An ammunition cartridge casing having a geometry designed to allow for the use of polymeric materials in forming the walls of the cartridge casing of an ammunition article, and methods of reusing such cartridges are provided. More specifically, the ammunition cartridge has a specified ratio between the wall-thicknesses of select portions of an ammunition article's cartridge casing such that polymeric materials may be used in the construction of the ammunition article cartridge casings.
Claims16
An ammunition article comprising:
- casing defining a generally cylindrical hollow body having a cap at a first end thereof and a caselet at a second end thereof, the caselet having a proximal end defining a body region and a distal end defining a neck region wherein the cap is interconnected with the proximal end of said caselet such that the casing at least partially encloses an internal volume, and wherein the diameter of the caselet narrows from a first diameter at the body region to a second diameter at the neck region;
- a propellant disposed and confined within said internal volume;
- a primer disposed at the first end of said casing in combustible communication with said propellant;
- wherein the caselet at least partially comprises a substantially polymeric material;
- and
- wherein the ratio of the minimum thickness of the wall of the body region of the caselet to the mid-point of the tolerance range of the wall thickness of the neck region of the ammunition casing is greater than 1.5.
3 more elements
Dependencies are inferred from the claim text.