NARROWING HIGH STRENGTH POLYMER-BASED CARTRIDGE CASING FOR BLANK AND SUBSONIC AMMUNITION
First Claim
1. A high strength polymer-based cartridge for at least one of blank or subsonic ammunition comprising:
- an upper component, molded from a polymer;
a bullet, having a conventional weight for a caliber of the bullet, removably engaged with the upper component;
a lower component, molded from a polymer, and engaged the upper component;
an insert engaged to the lower component;
a shoulder portion of the upper component;
an upper component inner wall extending from the shoulder to the lower component and having a first diameter;
a lower component inner wall extending from the upper component to the insert having a second diameter; and
a linear slope disposed between the first diameter and the second diameter;
wherein the upper and lower component inner walls form a propellant chamber;
wherein the first diameter does not equal the second diameter; and
wherein the slope between the first and second diameters reduces a volume of the propellant chamber.
1 Assignment
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Accused Products
Abstract
A high strength polymer-based cartridge casing includes an upper component of polymer, a bullet of a standard weight, a lower component of polymer, and an insert. The upper component has a shoulder portion and an upper component inner wall has a first diameter extending from the shoulder. The lower component has a lower component inner wall having a second diameter. The upper and lower component inner walls form a propellant chamber; and the first and second diameters reduce a volume of the propellant chamber. The reduced volume of the propellant chamber permits only enough propellant to propel a bullet engaged in the cartridge casing at subsonic speeds.
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Citations
8 Claims
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1. A high strength polymer-based cartridge for at least one of blank or subsonic ammunition comprising:
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an upper component, molded from a polymer; a bullet, having a conventional weight for a caliber of the bullet, removably engaged with the upper component; a lower component, molded from a polymer, and engaged the upper component; an insert engaged to the lower component; a shoulder portion of the upper component; an upper component inner wall extending from the shoulder to the lower component and having a first diameter; a lower component inner wall extending from the upper component to the insert having a second diameter; and a linear slope disposed between the first diameter and the second diameter; wherein the upper and lower component inner walls form a propellant chamber; wherein the first diameter does not equal the second diameter; and wherein the slope between the first and second diameters reduces a volume of the propellant chamber. - View Dependent Claims (2, 3, 4, 5)
wherein the second diameter is greater than the third diameter; and wherein the slope extends to the third diameter.
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6. A method of making a high strength polymer-based cartridge casing for at least one of blank or subsonic ammunition comprising the steps of:
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molding an upper component from a polymer; molding a lower component from a second polymer; engaging the upper component to the lower component; forming an insert engaged to the lower component; molding a shoulder portion of the upper component; extending an upper component inner wall from the shoulder to the lower component; molding a first diameter in the upper component; extending a lower component inner wall from the upper component to the insert; molding a second diameter in the lower component inner wall not equal to the first diameter; molding a linear slope disposed between the first diameter and the second diameter; forming a propellant chamber from the upper and lower component inner walls, the slope between the first and second diameters reducing a volume of the propellant chamber; and permitting, based on the reduced volume, only enough propellant to propel the bullet at subsonic speeds. - View Dependent Claims (7, 8)
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Specification