40 mm low cost cartridge

• US 20060032393A1
• Filed: 07/23/2004
• Published: 02/16/2006
• Est. Priority Date: 04/08/2004
• Status: Active Grant

• Current Assignee: Rheinmetall Waffe Munition GmbH (Rheinmetall AG)
• Original Assignee: Nico-Pyrotechnik Hanns-Juergen Diederichs GmbH & Co KG (Rheinmetall AG)
• Inventors: Haeselich, Detlef
• Granted Patent: US 7,819,065 B2
• Time in Patent Office: Days
• US Class Current: 102/502
• CPC Class Codes: F42B 12/40 of target-marking, i.e. impact-indicating type F42B12/48, F42B12/50 take precedence
• CPC Class Codes: F42B 8/02 Cartridges F41A33/02, F42B7/12 take precedence
• CPC Class Codes: F42B 8/16 containing an inert filler in powder or granular form

Abstract

The cartridge-type training round consists of a projectile and a cartridge shell into which the projectile is inserted. The projectile includes a one-piece cylindrical central body (2) and a one-piece basin-shaped projectile tip (5) that is pressed onto the central body and engages a circumferential engagement bead (7) with a circumferential engagement slot (8) located in the central body (2). The cartridge shell (20) is a one-piece basin-shaped part; it is also pressed onto the central body (2) and engages a circumferential engagement bead (22) with a circumferential engagement slot (23) of the central body (2). A receiver recess (25) is provided in an approximately cylindrical projection (24) that is inserted centered from the base to receive the propulsive charge (28) and its igniter (29). The round is of simple design, and may be manufactured inexpensively owing to its simple parts that may be largely of plastic without loss of function.

Claims

1. Practice cartridge round, comprising projectile including a projectile body and a projectile tip, and a cartridge shell into which the projectile is inserted, and that possesses a propulsion chamber, a pyrotechnic propulsive charge, and a pyrotechnic igniter for the propulsive charge, whereby the round may be used in a long-barrel weapon, and whereby the projectile is propelled out of the cartridge shell upon ignition of the propulsive charge by means of pressure buildup within the propulsion chamber, the improvement wherein the projectile includes a one-piece cylindrical central body and a one-piece basin-shaped projectile tip that is provided with a spring-elastic collar with a first engagement element surrounding the outer edge and facing inward so that, when the projectile tip is pressed onto the central body, the first engagement element engages a circumferential engagement bead with a circumferential engagement slot located in the central body;

wherein the cartridge shell is a one-piece basin-shaped part whose open end transforms into a collar that includes a first surrounding engagement element at its open end that engages with a circumferential engagement slot of the central body, and wherein an approximately cylindrical projection projects inward from the base of the cartridge shell, in which a receiver recess is provided for the propulsive charge and for an igniter device, whereby the projectile is provided with an exhaust aperture (26) that ends beneath the base of the central body.

2. Practice cartridge round as in claim 1, wherein the one-piece projectile tip and the one-piece cartridge shell are each made of plastic material.

3. Practice cartridge round as in claim 1, wherein the central body is made of a plastic-composite material with high specific weight.

4. Practice cartridge round as in claim 3, wherein the composite material is a mixture of plastic and bronze.

5. Practice cartridge round as in claim 1, wherein the central body includes a circumferential projection that serves as guide or twist band when the projectile is fired from a drawn barrel.

6. Practice cartridge round as in claim 5, wherein the second circumferential engagement element of the central body is positioned directly above or below the guide or twist band to lock the hood or the cartridge shell.

7. Practice cartridge round as in claim 1, wherein the spring-elastic collar of the cartridge shell tapers along the direction of the second engagement element of the central body and rests in the area of this engagement element within the outer diameter of the central body.

8. Practice cartridge round as in claim 1, wherein marking material is provided within the projectile tip in order to mark the strike point of the projectile on the target.

9. Practice cartridge round as in claim 8, wherein the marking material is at least one of a dye powder and/or and a chemoluminescent component.