Aug 11, 2026

US12704359 - Plastic cartridge case for artillery shot

The invention relates to ammunition, in particular to the construction of composite artillery cartridge cases and can find wide application in the production of general cartridge cases with plastic main body for artillery shots with split-cartridges and unitary loading. The abovementioned cartridge case contain a metal bottom and a plastic body fixed to it, centrally in the metal bottom is made a cylindrically shaped protrusion in which a stepped hole is formed, in which a primer for artillery cartridges is mounted by means of a threaded connection, as at the metal bottom of a plastic main body is placed a mounting ring. In the metal bottom 1 at least two blind holes are formed, with a diameter equal to 0.1 to 0.25 of the diameter of the metal bottom 1 and a depth of 0.35 to 0.5 of the thickness of the bottom of the metal bottom 1 , and in the bottom of the plastic main body 2 are formed at least two protruding, fixing elements 6.

Inventors: Stancho Petkov Petkov, Dobrin Ivanov Ivanov
Filing date: 2022-06-23

ammunitionartillerycartridgeplastic

The patent describes a composite artillery cartridge case featuring a metal bottom and a plastic body, designed for enhanced performance in artillery shots. It includes a threaded primer connection and specific structural features like blind holes and protruding fixing elements to ensure secure assembly and functionality.

Claim 1

1 . A composite artillery cartridge case containing a metal bottom and a plastic body fixed to the metal bottom, the metal bottom includes a cylindrically shaped protrusion which includes a stepped hole, in which a primer for artillery cartridges is mounted by means of a threaded connection, as the metal bottom and the plastic body ( 3 ) are connected by a clamping fastening ring ( 4 ), and between the bottom of the plastic body ( 3 ) and the lower surface of the clamping fastening ring ( 4 ) is placed a sealing pad, characterized in that the metal bottom ( 1 ), is provided with inner radius and in which at least two blind holes are formed, with a diameter equal to 0.1 to 0.25 of the diameter of the metal bottom ( 1 ), and a depth of 0.35 to 0.5 of the thickness of the bottom of the metal bottom ( 1 ), and in the bottom of the plastic body ( 3 ) are formed at least two protruding, fixing elements ( 6 ), with a diameter equal from 0.1 to 0.25 of the diameter of the metal bottom ( 1 ), as the blind holes and the protruding fixing elements correspond in shape, size and location, whereby in the cylindrically shaped protrusion ( 6 ) of the metal bottom ( 1 ) threaded sector is made.

Google Patents

https://patents.google.com/patent/US12704359

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12704359