# US 2019/0376771 A1 · Polymer-based cartridge casing for subsonic ammunition

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- Number: US 2019/0376771 A1
- Document ID: US20190376771A1
- Status: Published application
- Kind: A1
- Application number: 16/518,453
- Filed: 2019-07-22
- Published: 2019-12-12
- Earliest claimed: 2011-01-14
- Assignees: PCP Tactical, LLC
- Applicants: PCP Tactical, LLC
- Inventors: Charles PADGETT; Robert Lanse PADGETT
- Web page: https://patentgrep.com/patent/US20190376771A1

## CPC

- F42B 5/307: formed by assembling several elements
- F42B 5/313: all elements made of plastics
- F42B 8/04: Blank cartridges, i.e. primed cartridges without projectile but containing an explosive or combustible powder charge
- F42B 12/76: of the casing
- F42B 33/02: Filling cartridges, missiles, or fuzes; Inserting propellant or explosive charges {(F42B33/004 takes precedence)}
- F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D)

## Abstract

A high strength polymer-based cartridge having a first end; a neck disposed at the first end and a shoulder disposed below the neck to form a bottleneck cartridge. A second end is opposite the first end and an insert is engaged to the second end. A propellant chamber is formed between the shoulder and the insert and has a volume. An extension extends from the neck opposite the shoulder and a cap is formed on the extension, partially sealing the propellant chamber.

## Claims

### Claim 1

A high strength polymer-based cartridge comprising:
a first end;
a neck disposed at the first end
a shoulder disposed below the neck forming a bottleneck cartridge;
a second end opposite the first end;
an insert engaged to the second end;
a propellant chamber formed between the shoulder and the insert and having a volume;
an extension extending from the neck opposite the shoulder; and
a cap formed on the extension, partially sealing the propellant chamber.

### Claim 2 (depends on 1)

The high strength polymer-based cartridge of claim 1, further comprising fingers radially spaced on the cap and configured to deform.

### Claim 3 (depends on 1)

The high strength polymer-based cartridge of claim 1, wherein the cap is star-shaped.

### Claim 4

A method of making a high strength polymer-based cartridge comprising the steps of:
molding a cartridge from a polymer having a first end, a second end opposite the first end, a neck, and a shoulder;
forming an insert engaged to the second end;
forming a propellant chamber between the shoulder and the insert;
forming an extension, extending from the neck, and opposite the shoulder; and
forming a cap on the extension partially sealing the propellant chamber.

### Claim 5 (depends on 4)

The method of making a high strength polymer-based cartridge of claim 4, further comprising the step of forming fingers, radially spaced on the cap, and configured to deform.

### Claim 6 (depends on 4)

The method of making high strength polymer-based cartridge of claim 4, wherein forming the cap comprises the step of molding a star-shaped cap.