Cartridge case and a round comprising such a cartridge case

• US 8,316,771 B2
• Filed: 10/10/2008
• Issued: 11/27/2012
• Est. Priority Date: 10/10/2008
• Status: Active Grant

• Current Assignee: Saab AB
• Original Assignee: Saab AB
• Inventors: Toreheim, Jon, Prytz, Alf, Karlsson, Geron
• Primary Examiner(s): DAVID, MICHAEL D
• Application Number:
  US13/123,264
• Publication Number:
  US 20110192313A1
• Time in Patent Office: 1,509 Days
• Field of Search: 102469-472, 102/377
• US Class Current: 102/469
• CPC Class Codes: F42B 39/20 Packages or ammunition having valves for pressure-equalising; Packages or ammunition having plugs for pressure release, e.g. meltable ; Blow-out panels; Venting arrangements ventilating arrangements on packages formed from foldable or erectable blanks B65D5/4295; packages with pressure-relief valves incorporated in a container wall B65D77/225
• CPC Class Codes: F42B 5/285 formed by assembling several elements
• CPC Class Codes: F42B 5/307 formed by assembling several elements

Abstract

A cartridge case intended for explosive materials. A releasable base plate is provided in a bottom section of the cartridge case. A base plate locking device includes a temperature dependent shape memory material. The shape memory material of the base plate locking device is provided to exert a crushing force on the cartridge case at a temperature increase passing a temperature such that the shape memory material in question struggles to resume a former shape in order to break up the connection between the base plate and the bottom section of the cartridge case and release the base plate from the bottom section of the cartridge case. A round of ammunition includes the cartridge case.

Claims

1. A cartridge case intended for explosive materials, comprising:

a releasable base plate provided in a bottom section of the cartridge case; and

a base plate locking device comprising a temperature dependent shape memory material,

wherein the shape memory material of the base plate locking device is provided to exert a crushing force on the cartridge case at a temperature increase passing a temperature such that the shape memory in question struggles to resume a former shape in order to break up the connection between the base plate and the bottom section of the cartridge case and release the base plate from the bottom section of the cartridge case.

2. The cartridge case according to claim 1, wherein the shape memory material is provided to exert a crushing force on the base plate.

3. The cartridge case according to claim 2, wherein the base plate comprises indications of fractions to facilitate the breaking up of the connection between the base plate and the bottom section of the cartridge case.

4. The cartridge case according to claim 3, wherein the indications of fractions comprise a v-shaped recess in the periphery of the base plate.

5. The cartridge case according to claim 1, wherein the shape memory material is provided in a space between the base plate and the bottom section of the cartridge case.

6. The cartridge case according to claim 1, wherein the shape memory material is provided to exert a crushing force on the bottom section of the cartridge case.

7. The cartridge case according to claim 6, wherein the bottom section of the cartridge case comprises indications of fractions to facilitate the breaking up of the connection between the base plate and the bottom section of the cartridge case.

8. The cartridge case according to claim 1, wherein the shape memory material is provided within the bottom section of the cartridge case.

9. The cartridge case according to claim 8, wherein the bottom section in connection to the shape memory material in a direction inwards is dimensioned to have a thinner material extension than inwards dimensions of adjacent parts of the bottom section.

10. A round of ammunition, comprising:

a cartridge case comprising a releasable base plate provided in a bottom section of the cartridge case, and a base plate locking device comprising a temperature dependent shape memory material, wherein the shape memory material of the base plate locking device is provided to exert a crushing force on the cartridge case at a temperature increase passing a temperature such that the shape memory in question struggles to resume a former shape in order to break up the connection between the base plate and the bottom section of the cartridge case and release the base plate from the bottom section of the cartridge case.