Fast utility access device and method of use thereof

Patent metadata

Field	Value
Publication number	US-11287239-B1
Application number	US-202016937113-A
Country	US
Kind code	B1
Filing date	Jul 23, 2020
Priority date	Jul 26, 2019
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

A fast utility access device (FUAD) is provided that includes one or more casings, each of the one or more casings collectively defining a bore, and a core of a highly exothermic composition contained in the bore and surrounded by a thermally insulating inner liner, the highly exothermic composition ignitable to create a post-ignition temperature of between 500° C. and 4000° C. A method is also provided for breaching a target and includes contacting the inventive access device with a breaching target substrate, thermally coupling at least one reaction initiator to the highly exothermic composition, triggering the at least one reaction initiator thereby igniting the highly exothermic composition, and allowing the highly exothermic composition to achieve a post-ignition temperature sufficient to melt the breaching target substrate, forming a hole therethrough.

First claim

The invention claimed is:

1. An access device, comprising:
one or more casings, each of said one or more casings collectively defining a bore; and
a core of a highly exothermic composition contained in said bore and surrounded by a thermally insulating liner, wherein said casing and said thermally insulating liner surround and enclose said highly exothermic composition with no nozzles being used so that no jets are formed when said highly exothermic composition is ignited, and wherein the highly exothermic composition is ignitable to create a post-ignition temperature of between 500° C. and 4000° C. so that said access device can melt through and breach a target substrate.

2. The access device of claim 1 , further comprising at least one reaction initiator thermally coupled to said highly exothermic composition and adapted to ignite said highly exothermic composition.

3. The access device of claim 2 , wherein said at least one reaction initiator is any one of a fuse, an electric match having an integral ignitor pellet wired to a clacker, or a shock tube connected to a pull ignitor.

4. The access device of claim 1 , wherein said one or more casings is a plurality of casings and further comprising one or more connectors adapted to join each of said plurality of casings together into a shape to define a breach.

5. The access device of claim 4 , further comprising at least one reaction initiator thermally coupled to said highly exothermic composition and adapted to ignite said highly exothermic composition, wherein said at least one reaction initiator is disposed in each of said one or more connectors.

6. The access device of claim 1 , wherein each of said one or more casings is flexible.

7. The access device of claim 1 , further comprising a metal propagator disposed in said bore.

8. The access device of claim 7 , wherein said one or more casings has a slit therethrough and said metal propagator comprises a magnesium ribbon or a layer of magnesium wrapping surrounding the highly exothermic composition.

9. The access device of claim 1 , wherein said highly exothermic composition is contained in said bore at a loading pressure of between 175 and 375 kilograms per square centimeter.

10. The access device of claim 1 , further comprising a high-temperature tolerant adhesive disposed on an outer surface of at least one of said one or more casings, said adhesive able to maintain adhesion to a breaching target substrate up to a temperature of 4000° C.

11. The access device of claim 4 , further comprising a high-temperature tolerant adhesive disposed on an outer surface of at least one of said one or more connectors, said adhesive able to maintain adhesion to a breaching target substrate up to a temperature of 4000° C.

12. The access device of claim 1 , wherein said thermally insulating liner is graphite.

13. The access device of claim 1 , further comprising at least one additive of silicone oil, polyethylene glycol, sodium silicate, thermoset curing binders, or combinations thereof added to said highly exothermic composition.

14. The access device of claim 1 , wherein said highly exothermic composition comprises a thermite composition of metal and metal oxide.

15. A method of breaching a target, comprising:
contacting the access device of claim 1 with a breaching target substrate;
thermally coupling at least one reaction initiator to said highly exothermic composition;
triggering said at least one reaction initiator thereby igniting said highly exothermic composition; and
wherein said highly exothermic composition achieves a post-ignition temperature sufficient to melt said breaching target substrate, forming a breach therethrough.

16. The method of claim 15 , wherein said post-ignition temperature is between 500° C. and 4000° C.

17. The method of claim 15 , wherein the thermally insulating liner of the access device is configured to focus heat generated by said highly exothermic composition post-ignition towards said breaching target substrate in contact with the access device.

18. The method of claim 15 , wherein said breaching target substrate is at least one of soda lime glass; coated glass; metal wire reinforced glass; polyvinyl butyral laminated glass; bullet resistant films on bullet proof glass; tempered glass; high grade safety glass; layered films; steel; concrete; cement; clay; wood; plaster; marble; granite; ceramics; plastics; brick; polyaramid; multi pane glass; glass blocks; polymeric windows/clear dividers used to separate areas of between rooms, a room and a hallway, or indoors/outdoors; or combinations thereof.

19. The method of claim 15 , further comprising modifying a configuration of said one or more casings to match a desired size and shape of a breach to be formed in said breaching target substrate.

20. The access device of claim 14 , wherein said metal is at least one of aluminum, magnesium, zirconium, titanium, zinc, silicon, boron, calcium, copper, or combinations thereof, and said metal oxide is at least one of titanium dioxide, copper(II) oxide, chromium(III) oxide, iron(II, III) oxide, magnetite, manganese(IV) oxide, silicon dioxide, boron trioxide, lead(II, IV) oxide, zirconium oxide, or combinations thereof.

Assignees

• Combat Capabilities Dev Command Chemical Biological Center
• Us Army

Inventors

• Polk Amee L
• Domanico Joseph A
• Kauzlarich Michael F
• Bonavito Nino L
• Gardner Warren L

Classifications

• F42D3/00

  Particular applications of blasting techniques {(explosive welding B23K20/08; explosive bolts or actuators F42B3/006; explosive valves F16K13/06; cutting devices actuated by explosion B23D15/145; pyrotechnical actuators F15B15/19; switching devices actuated by explosion H01H39/00)} · CPC title

• F42D1/04 Primary

  Arrangements for ignition {(ignition systems for shaped charge perforators E21B43/1185; ignition devices for seismic energy generators G01V1/06)} · CPC title

• C06B33/00

  Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide · CPC title

• F42D1/043 Primary

  Connectors for detonating cords and ignition tubes, e.g. Nonel tubes (mounting of detonators in blasting cartridges F42B3/26) · CPC title

• F42D3/02

  for demolition of tall structures, e.g. chimney stacks · CPC title