Primer diffuser for polymer ammunition cartridges

Abstract

The present invention provides a diffuser cup or ring adapted to hold a primer used in an ammunition cartridge comprising a bottom surface sized to fit in a primer recess for an ammunition cartridge; a diffuser aperture positioned through the bottom surface and aligned with a flash hole; a cup wall attached to the bottom surface and extending away from the bottom surface; and an interior cavity bordered by the cup wall and the bottom surface and sized to frictionally fit a primer.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a Divisional Application of U.S. patent application Ser. No. 14 / 731,731 filed on Jun. 5, 2015, which is a Continuation-in-Part of U.S. patent application Ser. No. 14 / 011,202 filed on Aug. 27, 2013 now U.S. Pat. No. 9,546,849 issued Jan. 17, 2017, which is a Divisional Application of U.S. patent application Ser. No. 13 / 292,843 filed on Nov. 9, 2011 now U.S. Pat. No. 8,561,543 issued Oct. 22, 2013, which claims the benefit of U.S. Provisional Patent Application Ser. No. 61 / 456,664, filed Nov. 10, 2010, the contents of each are hereby incorporated by reference in their entirety.TECHNICAL FIELD OF THE INVENTION[0002]The present invention relates in general to the field of ammunition primers, specifically to compositions of matter and methods of making and using primers having a diffuser for use with polymer ammunition cartridges.STATEMENT OF FEDERALLY FUNDED RESEARCH[0003]None.INCORPORATION-BY-REFERENCE OF MATERIALS FILED ...

AI Technical Summary

Benefits of technology

The present invention provides a diffuser cup and diffuser ring that can be used in ammunition cartridges to separate the primer and primer recess using a bottom surface and diffuser aperture. The diffuser cup and diffuser ring can be made from metal, alloy, composite, or polymer and may include adhesive to improve fit and performance. Both the diffuser cup and diffuser ring can be used in the same ammunition cartridge.

Problems solved by technology

Conventional ammunition cartridge casings for rifles and machine guns, as well as larger caliber weapons, are made from brass, which is heavy, expensive, and potentially hazardous.

Plastic cartridge casings have been known for many years but have failed to provide satisfactory ammunition that could be produced in commercial quantities with sufficient safety, ballistic, handling characteristics, and survive physical and natural conditions to which it will be exposed during the ammunition's intended life cycle; however, these characteristics have not been achieved.

Shortcomings of the known plastic or substantially plastic ammunition include the possibility of the projectile being pushed into the cartridge casing, the bullet pull being too light such that the bullet can fall out, the bullet pull being too insufficient to create sufficient chamber pressure, the bullet pull not being uniform from round to round, and portions of the cartridge casing breaking off upon firing or insufficient sealing about the primer.

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