Flexible metal/metal oxide and/or intermetallic reactant ribbon cutting system

Patent metadata

Field	Value
Publication number	US-11976908-B2
Application number	US-202217733081-A
Country	US
Kind code	B2
Filing date	Apr 29, 2022
Priority date	Apr 30, 2021
Publication date	May 7, 2024
Grant date	May 7, 2024

Abstract

Provided is a blast-free alternative tool for breaching operations for the intended purpose of cutting metal, including rebar, steel cables, I-beams, thin walled containers, welding doors, and the like. The apparatus includes a flexible and cuttable tube containing metal oxide/metal (thermite) mixture, capable of being formed around a target material and of NONEL ignition. The apparatus can be used to cut, weld, or ignite target material. Protective caps are included with provisions to insert shock tube or time fuse to transmit ignition to first fire mix. A fire proof or flame retardant flexible outerwrap with adhesive (such as hydrogel) or malleable retention wires covers the cutting ribbon for heat and slag retention. In the preferred embodiment, the apparatus is issued/manufactured in rolls or precut lengths.

First claim

The invention claimed is:

1. A metal/metal oxide cutting system comprising:
a flexible and cuttable outer tube;
a first pyrotechnic composition contained within said outer tube;
one or more end caps to seal one or both ends of said outer tube and further comprising a first fire mixture, and a port plug for insertion of a shock tube or a time fuse; and
a fire proof or flame retardant flexible thermal retention wrap that is wrapped around said outer tube;
wherein said shock tube or said time fuse transmits heat and shock to said first fire mixture, which in turn ignites said first pyrotechnic composition in an exothermic redox reaction.

2. The system of claim 1 , wherein said outer tube further comprises a malleable wire core that permits said outer tube to be bent and shaped to conform to a target.

3. The system of claim 1 , wherein said first pyrotechnic composition comprises a metal powder and metal oxide and/or intermetallic reactant contained within said outer tube.

4. The system of claim 3 , wherein said metal powder and metal oxide comprises thermite.

5. The system of claim 1 , further comprising a second pyrotechnic composition comprising a rapid fire core comprising a fire mixture which is ignitable via shock tube or time fuse.

6. The system of claim 1 , further comprising a second pyrotechnic composition comprising an instantaneous fire core comprising a hollow core that contains an HMX explosive that is ignitable via shock tube or time fuse.

7. The system of claim 1 , further comprising a second pyrotechnic composition comprising a fire nozzle core comprising a solid or hollow geometry that accelerates the burning of said first pyrotechnic composition.

8. The system of claim 1 , wherein said thermal retention wrap comprises a fireproof fabric or composite structure comprising fireproof ceramics.

9. The system of claim 1 , wherein said thermal retention wrap comprises a hydrogel or phase-changing material to adhere said wrap to said target.

10. The system of claim 1 , wherein said shock tube comprises NONEL.

11. A metal/metal oxide cutting system comprising:
a flexible and cuttable outer tube;
a first pyrotechnic composition contained within said outer tube, wherein said first pyrotechnic composition comprises a metal powder and metal oxide and/or intermetallic reactant;
a second pyrotechnic composition contained within said outer tube, wherein said second pyrotechnic composition is selected from the group consisting of a rapid fire core comprising a fire mixture, an instantaneous fire core comprising a hollow core that contains an HMX explosive, and a fire nozzle core comprising a solid or hollow geometry that accelerates the burning of said first pyrotechnic composition;
a malleable wire core contained within said outer tube that permits said outer tube to be bent and shaped to conform to a target;
one or more end caps comprising port plugs that allow for insertion of a shock tube or a time fuse to transmit ignition to said first and second pyrotechnic compositions, wherein said end cap further comprises a fire mixture that is ignitable via said shock tube or said time fuse; and
a fire proof or flame retardant flexible thermal retention wrap comprising that is wrapped around said outer tube, wherein said wrap comprises a fireproof fabric or composite structure comprising fireproof ceramics and a hydrogel or phase-changing material to adhere said wrap to said target.

12. The system of claim 11 , wherein said metal powder and metal oxide comprises thermite.

13. The system of claim 11 , wherein said shock tube comprises NONEL.

14. A metal/metal oxide cutting system comprising:
a flexible and cuttable outer tube;
a malleable wire core that permits said outer tube to be bent and shaped to conform to a target;
a first pyrotechnic composition contained within said outer tube;
one or more end caps to seal one or both ends of said outer tube and further comprising a first fire mixture, and a port plug for insertion of a shock tube or a time fuse; and
a fire proof or flame retardant flexible thermal retention wrap that is wrapped around said outer tube;
wherein said shock tube or said time fuse transmits heat and shock to said first fire mixture, which in turn ignites said first pyrotechnic composition in an exothermic redox reaction.

15. The system of claim 14 , wherein said first pyrotechnic composition comprises a metal powder and metal oxide and/or intermetallic reactant contained within said outer tube.

16. The system of claim 15 , wherein said metal powder and metal oxide comprises thermite.

17. The system of claim 14 , wherein said shock tube comprises NONEL.

Assignees

• Us Navy

Inventors

• Thompson Clayton A
• Faucheux Paul D

Classifications

• F41H11/14

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• F42D3/02

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• F42B3/22

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• F42B3/087 Primary

  Flexible or deformable blasting cartridges, e.g. bags or hoses {for slurries}(loaded cartridge bags F42B5/38) · CPC title