Propulsion system for cartridge ammunition

Patent metadata

Field	Value
Publication number	US-10989505-B2
Application number	US-201916685560-A
Country	US
Kind code	B2
Filing date	Nov 15, 2019
Priority date	May 18, 2017
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

Abstract

A fragment-free propulsion of a cartridge-type ammunition, including a propellant casing and a high-pressure chamber, wherein the high-pressure chamber accommodates a propellant powder and, in the bottom region, a primer, having at least one overflow bore. To avoid fragments, a membrane, which separates the high-pressure chamber and a low-pressure chamber from one another and which does not tear to connect the high-pressure chamber to the low-pressure chamber when pressure is built up but instead is bent, is embedded in the high-pressure chamber. For this purpose, the high-pressure chamber additionally has a cap, the membrane, and a body. The membrane is embedded in the body and is secured by the cap. In addition, the membrane covers a gap that is formed by an outer diameter of the cap and an inner diameter of the body, and into which the membrane is bent when pressure is built up.

First claim

What is claimed is:

1. A propulsion of a cartridge-type ammunition, comprising:
a propellant casing; and
a high-pressure chamber, the high-pressure chamber comprising:
a propellant powder;
a primer in a bottom region;
at least one overflow bore;
a cap;
a membrane; and
a body,

wherein the membrane is embedded in the body and secured by the cap, and
wherein the membrane covers a second gap formed by an outer diameter of the cap and an inner diameter of the body.

2. The propulsion according to claim 1 , wherein the body has overflow bores that are covered by the membrane.

3. The propulsion according to claim 1 , wherein a connection is introduced into the body between the overflow bores and the membrane.

4. The propulsion according to claim 1 , wherein the membrane rests against a shoulder in the body.

5. The propulsion according to claim 1 , wherein at least one connection, which is an annular groove, is present between the at least one overflow bore with the second.

6. The propulsion according to claim 5 , wherein the connection is formed by recesses in the cap and body.

7. A cartridge-type ammunition comprising:
a propulsion according to claim 1 ; and
a projectile.

8. The cartridge-type ammunition according to claim 7 , wherein a mechanical connection between the projectile and the propulsion is created by the body of the high-pressure chamber.

9. The cartridge-type ammunition according to claim 8 , wherein the body is connected in the upper region to a projection on the projectile base of the projectile.

10. The cartridge-type ammunition according to claim 8 , wherein the connection between the body and the projectile base is a threaded connection.

11. The cartridge-type ammunition according to claim 7 , further comprising a delay element or a tracer arranged in the projectile base and a flash-over bore arranged in the high-pressure chamber that extends to the projectile base.

12. The cartridge-type ammunition according to claim 11 , wherein a stepped bore, which ensures shearing off of the membrane located below the flash-over bore in the interior region of the stepped bore when pressure is applied, is located in front of the flash-over bore.

13. The cartridge-type ammunition according to claim 11 , wherein the flash-over bore and the stepped bore are integrated into the cap of the high-pressure chamber.

Assignees

• Rheinmetall Waffe Munition Gmbh

Inventors

• Redeker Hendrik
• Dehrmann Stephan
• Dierks Lars

Classifications

• F42C19/0807

  characterised by the particular configuration of the transmission channels from the priming energy source to the charge to be ignited, e.g. multiple channels, nozzles, diaphragms or filters · CPC title

• F42B5/067 Primary

  Mounting or locking missiles in cartridge cases (F42B5/18 takes precedence) · CPC title

• F42C19/083

  characterised by the shape and configuration of the base element embedded in the cartridge bottom, e.g. the housing for the squib or percussion cap · CPC title

• F42B5/02 Primary

  Cartridges, i.e. cases with charge and missile · CPC title

• F42B3/24

  Cartridge closures or seals (top closures for shotgun ammunition cartridges F42B7/12) · CPC title