Inflatable tool for plasma generation and shaped charge stand-off

• US 10,458,770 B1
• Filed: 01/25/2018
• Issued: 10/29/2019
• Est. Priority Date: 01/25/2018
• Status: Active Grant

• Current Assignee: the united states of america as represented by the secretary of the navy
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Wilhelm, Christopher, Emery, Samuel, Giannuzzi, Paul, McCarthy, Daniel, Wilhelm, Lesley
• Primary Examiner(s): Semick, Joshua T
• Application Number:
  US15/932,015
• Time in Patent Office: 642 Days
• CPC Class Codes: F41H 11/12 Means for clearing land minefields; Systems specially adapted for detection of landmines
• CPC Class Codes: F42B 3/087 Flexible or deformable blasting cartridges, e.g. bags or hoses for slurriesloaded cartridge bags F42B5/38
• CPC Class Codes: F42B 33/067 by combustion incineration apparatuses or processes for used articles F23G7/003
• CPC Class Codes: F42D 5/04 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

Abstract

An explosive ordnance disposal (EOD) tool has an inflated state and a deflated, collapsed state. In the inflated state, the EOD tool includes a central longitudinal axis and a radially outer portion. The radially outer portion contains an inflation composition. The radially outer portion includes an opening for admitting the inflation composition into the radially outer portion, an exterior wall and an interior wall that defines a through opening centered on the central longitudinal axis.

Claims

1. An apparatus, comprising:

an explosive ordnance disposal (EOD) tool including an inflated state and a deflated, collapsed state,

wherein, in the inflated state, the EOD tool include a central longitudinal axis, a radially outer portion that contains an inflation composition and includes a plug to admit the inflation composition into the radially outer portion, an exterior wall and an interior wall that defines a through opening centered on the central longitudinal axis,

wherein the through opening includes an upper portion configured to hold one of a hand-loaded energetic charge and a shaped charge, and a lower portion configured to act as an energetic guide for the one of the energetic charge and the shaped charge,

wherein the upper portion of the through opening includes a cylindrical shape, and

wherein the lower portion of the through opening includes one of a constant cross-section and a decreasing cross-section; and

an energetic charge being disposed in the upper portion of the through opening, wherein the lower portion has a shape of a frustum,

wherein an angle between a wall of the lower portion, and a horizontal is in a range of from less than 90 degrees to about 50 degrees, and

wherein an inflation composition is one of air and water.

2. The apparatus of claim 1, wherein the through opening is a cylindrical shaped through opening.

3. The apparatus of claim 1, wherein the exterior wall of the radially outer portion includes a triangular cross-section.

4. The apparatus of claim 1, wherein the exterior wall of the radially outer portion includes a rectangular cross-section.

5. The apparatus of claim 1, wherein the exterior wall of the radially outer portion includes a hexagonal cross-section.

6. The apparatus of claim 1, wherein the lower portion has a shape of a frustum.

7. The apparatus of claim 1, further comprising a shaped charge being disposed in the upper portion of the through opening.

8. A method, comprising:

providing the apparatus of claim 1;

hand-loading an energetic charge in the upper portion of the through opening; and

imparting a shockwave at an effective velocity and temperature on a gas in the through opening to ionize the gas for creating plasma and to drive the plasma.

9. The method of claim 8, further comprising, after the imparting step, impacting the plasma on a casing of an explosive ordnance containing an explosive to penetrate through the casing and, at least before causing an explosive event of the explosive within the casing, substantially consuming the explosive.

10. The method of claim 8, wherein the gas in the through opening is air.

11. The method of claim 9, wherein the energetic charge includes a detonation velocity of at least 7 mm/microsecond.

12. The method of claim 11, wherein the energetic charge has an effective velocity of at least 6 mm/microsecond.

13. A method, comprising:

providing the apparatus of claim 1;

loading a shaped charge in the upper portion of the through opening; and

detonating the shaped charge for producing a jet that moves away from the shaped charge and through the lower portion of the through opening.

14. The method of claim 13, further comprising directing the jet from the lower opening to impact an explosive ordnance.

15. The method of claim 14, wherein the explosive ordnance is an improvised explosive device.

16. The method of claim 14, wherein the explosive ordnance is an unexploded ordnance.