Remotely actuated multi-use modular explosive ordnance disposal rocket dearmer

Patent metadata

Field	Value
Publication number	US-10704881-B1
Application number	US-201916602049-A
Country	US
Kind code	B1
Filing date	Jul 29, 2019
Priority date	Jul 29, 2019
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

A novel dearmer enables EOD technicians to propel dearmer projectiles using conventional electric .50 caliber blank cartridges or conventional non-electric 12 gauge blank cartridges. The dearmer projectiles may render energetic threats safe without requiring an opposing force to offset the recoil. The conventional blank cartridge functions as a rocket motor that supplies gas to a converging/diverging nozzle. Alternatively, liquid is loaded into the dearmer (creating a liquid rocket effect) and the EOD projectile is propelled toward a target from the end of the dearmer opposite the liquid.

First claim

What is claimed is:

1. A dearmer, comprising:
a blank cartridge being configured to create propulsion gas;
an air-tight insert being disposed around the blank cartridge and conforming to an exterior profile of the blank cartridge;
an EOD projectile being disposed adjacent a base of the blank cartridge;
an outer sleeve being disposed around the air-tight insert; and
a converging-diverging nozzle being disposed adjacent an end of the blank cartridge that is opposite the base of the blank cartridge and fixed to the outer sleeve,
wherein the converging-diverging nozzle is configured to receive the propulsion gas and thereby propel the dearmer toward a target to dearm the target.

2. The dearmer of claim 1 , wherein the EOD projectile is attached to the outer sleeve.

3. The dearmer of claim 1 , wherein the EOD projectile is integral with the outer sleeve.

4. The dearmer of claim 1 , wherein the blank cartridge is one of an electric .50 caliber blank cartridge and a non-electric 12 gauge blank cartridge.

5. The dearmer of claim 1 , wherein the EOD projectile is a conventional EOD slug.

6. The dearmer of claim 1 , further comprising a rupture disk being disposed between the end of the blank cartridge opposite the base of the blank cartridge and the converging-diverging nozzle.

7. The dearmer of claim 1 , further comprising a launch tube, wherein the dearmer is disposed in the launch tube prior to ignition of the blank cartridge.

8. A method of dearming an energetic threat, comprising:
providing the dearmer of claim 1 ;
igniting the blank cartridge;
moving the propulsion gas through the converging-diverging nozzle; and
propelling the dearmer toward the target.

9. The method of claim 8 , further comprising, before igniting the blank cartridge, placing the dearmer in a tube.

10. The method of claim 8 , wherein said igniting the blank cartridge includes igniting one of an electric .50 caliber blank cartridge and a non-electric 12 gauge blank cartridge.

Assignees

• Us Navy

Inventors

• Foltz Lee
• Mccarthy Dan

Classifications

• F42D5/04 Primary

  Rendering explosive charges harmless, e.g. destroying ammunition ({F42B39/14 and F42B39/20 take precedence } ; extracting primers, dismantling ammunition F42B33/04, F42B33/06 {; chemical deactivating of explosives C06B21/0091}); Rendering detonation of explosive charges harmless · CPC title

• F42B33/062

  by high-pressure water jet means · CPC title

• F42B33/06 Primary

  Dismantling fuzes, cartridges, projectiles, missiles, rockets or bombs ({F42B33/004 and} F42B33/04 take precedence; {elimination of undesirable components of explosives C06B21/0091}) · CPC title

• F41H11/12

  Means for clearing land minefields; Systems specially adapted for detection of landmines · CPC title

• F41B9/0046

  Disruptors, i.e. for neutralising explosive devices · CPC title