Case bottom for large caliber ammunition and method for producing same

Abstract

A case bottom is provided for use with a large-caliber ammunition cartridge. The case bottom has a bottom section; a cylindrical section connected to the bottom section; a guide region provided on an end of the cylindrical section opposite the bottom section; and a ring-shaped elastic obturation that projects from and is connected to the cylindrical section. An outside diameter of the guide region is such that it is for supporting itself directly on an inside wall of a loading chamber for a respective weapon barrel following loading of the cartridge.

Description

CROSS REFERENCE TO RELATED APPLICATION [0001] This application claims the priority of German Patent Application, DE 103 54 011.3 filed Nov. 19, 2003, which is incorporated herein by reference. BACKGROUND OF THE INVENTION [0002] The invention relates to a case bottom for large-caliber ammunition. The invention furthermore relates to a method for producing a case bottom of this type. [0003] A related case bottom is known, for example, from reference DE 23 03 790 C3. It comprises a bottom section and a cylindrical case section made of steel, provided on the front with a relatively thin-walled, web-type guide region for guiding a ring-shaped obturation. The web-type guide region in this case is covered on the inside and outside completely by the obturation, so that following the loading of the respective cartridge, the guide region supports itself via the obturation, e.g. consisting of rubber, on the wall of the weapon barrel. [0004] The known case bottom has the disadvantage that the w...

AI Technical Summary

Benefits of technology

[0005] It is an object of the present invention to provide a case bottom for which the guide region necessary for guiding the obturation is no longer plastically deformed, not even with gas pressures typical for performance-enhanced ammunition, thus requiring only relatively low forces for removing the case bottom from the weapon. The invention furthermore relates to a method for producing a case bottom of this type by reworking a known case bottom with a guide region enclosed on the outside and the inside by the elastic obturation.

[0011] There are proven advantages if the inside surface of the case section is provided with an annular groove in the guide region, to which the ring-shaped obturation can be connected by vulcanizing, thus permitting a simple and secure installation of the obturation.

Problems solved by technology

The known case bottom has the disadvantage that the web-type guide region frequently plasticizes near the wall of the weapon barrel if the case bottom is subjected to high pressures, such as are typical with performance-enhanced KE ammunition.

This non-reversible deformation of the guide region causes a jamming of the case bottom inside the weapon barrel, so that increased forces are required to remove the case bottom from the weapon loading chamber after the firing, wherein the respective weapons frequently cannot generate these forces.

In addition, the case bottom is generally not reusable in that case.

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