Containment vessels for rapid thermo-chemical decontamination of facemasks or other personal protection equipment (PPE)

Patent metadata

Field	Value
Publication number	US-12194181-B2
Application number	US-202016944617-A
Country	US
Kind code	B2
Filing date	Jul 31, 2020
Priority date	Apr 24, 2020
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

An apparatus includes a containment vessel having an interior space configured to be sealed. The interior space is configured to receive at least one reservoir of liquid to be vaporized during a decontamination process. The apparatus also includes a base configured to be inserted into the interior space. The base is configured to receive one or more pieces of personal protection equipment to be heated and decontaminated within the interior space during the decontamination process. The base is configured to hold the one or more pieces of personal protection equipment above the at least one reservoir of liquid. The apparatus further includes a pressure-relief valve configured to be opened to release a pressure within the interior space. In some cases, the apparatus may include a filter configured to filter material passing through the pressure-relief valve.

First claim

What is claimed is:

1. A method comprising:
placing multiple reservoirs of liquid to be vaporized during a decontamination process in a liquid holding area in an interior space of a containment vessel, wherein the liquid holding area includes multiple channels fluidly coupling the reservoirs;
transporting the liquid between the reservoirs using the multiple channels;
placing multiple pieces of personal protection equipment within the interior space of the containment vessel on multiple stands of a base, the base configured to hold the pieces of personal protection equipment above the reservoirs of liquid;
sealing the interior space of the containment vessel;
vaporizing the liquid in the reservoirs to travel upward and surround the pieces of personal protection equipment by applying external heat to the containment vessel;
decontaminating the pieces of personal protection equipment by heating the pieces of personal protection equipment in the sealed interior space of the containment vessel; and
opening a pressure-relief valve of the containment vessel after decontaminating the pieces of personal protection equipment.

2. The method of claim 1 , further comprising:
drying the decontaminated pieces of personal protection equipment by heating the decontaminated pieces of personal protection equipment in the containment vessel after the pressure-relief valve is opened.

3. The method of claim 1 , wherein the reservoirs of liquid comprise at least one reservoir of a low-concentration hydrogen peroxide solution.

4. The method of claim 1 , wherein heating the pieces of personal protection equipment comprises heating the pieces of personal protection equipment to a temperature of about 65° C. to about 80° C.

5. The method of claim 1 , further comprising:
allowing the vaporized liquid to pass through multiple holes in the base and surround the pieces of personal protection equipment.

6. The method of claim 1 , further comprising:
filtering air or liquid material passing through the pressure-relief valve.

7. The method of claim 1 , wherein heating the pieces of personal protection equipment comprises heating the pieces of personal protection equipment using a microwave, a stovetop, or an oven.

8. The method of claim 1 , wherein:
the base comprises one of multiple bases; and
the method further comprises inserting each of the multiple bases into the interior space to receive one or more different pieces of personal protection equipment.

9. A method comprising:
placing multiple reservoirs of liquid to be vaporized during a decontamination process in a liquid holding area in an interior space of a containment vessel, wherein the liquid holding area includes multiple channels fluidly coupling the reservoirs;
transporting the liquid between the reservoirs using the multiple channels;
placing multiple pieces of personal protection equipment within the interior space of the containment vessel on multiple stands of a first base, the first base configured to hold the pieces of personal protection equipment above the reservoirs of liquid;
placing one or more additional pieces of personal protection equipment within the interior space of the containment vessel on a second base, the second base configured to hold the one or more additional pieces of personal protection equipment above the first base;
sealing the interior space of the containment vessel;
vaporizing the liquid in the reservoirs to travel upward and surround the pieces of personal protection equipment by applying external heat to the containment vessel;
decontaminating the pieces of personal protection equipment and the one or more additional pieces of personal protection equipment by heating the pieces of personal protection equipment and the one or more additional pieces of personal protection equipment in the sealed interior space of the containment vessel; and
opening a pressure-relief valve of the containment vessel after decontaminating the pieces of personal protection equipment and the one or more additional pieces of personal protection equipment.

10. The method of claim 9 , further comprising:
drying the decontaminated pieces of personal protection equipment and the one or more decontaminated additional pieces of personal protection equipment by heating the decontaminated pieces of personal protection equipment and the one or more decontaminated additional pieces of personal protection equipment in the containment vessel after the pressure-relief valve is opened.

11. The method of claim 9 , wherein the reservoirs of liquid comprise at least one reservoir of a low-concentration hydrogen peroxide solution.

12. The method of claim 9 , wherein heating the pieces of personal protection equipment and the one or more additional pieces of personal protection equipment comprises heating the pieces of personal protection equipment and the one or more additional pieces of personal protection equipment to a temperature of about 65° C. to about 80° C.

13. The method of claim 9 , further comprising:
allowing the vaporized liquid to pass through multiple holes in the first base and surround the pieces of personal protection equipment.

14. The method of claim 9 , further comprising:
filtering air or liquid material passing through the pressure-relief valve.

15. The method of claim 9 , wherein heating the pieces of personal protection equipment and the one or more additional pieces of personal protection equipment comprises heating the pieces of personal protection equipment and the one or more additional pieces of personal protection equipment using a microwave, a stovetop, or an oven.

16. The method of claim 9 , wherein the first base is sized or shaped to move past brackets for the second base.

17. The method of claim 1 , wherein sealing the interior space of the containment vessel comprises closing the pressure-relief valve of the containment vessel once air in the interior space is replaced substantially with the vaporized liquid.

18. The method of claim 1 , further comprising:
after opening the pressure-relief valve, heating an inside of the containment vessel to remove moisture from the pieces of personal protection equipment.

19. The method of claim 9 , wherein sealing the interior space of the containment vessel comprises closing the pressure-relief valve of the containment vessel once air in the interior space is replaced substantially with the vaporized liquid.

20. The method of claim 9 , further comprising:
after opening the pressure-relief valve, heating an inside of the containment vessel to remove moisture from the pieces of personal protection equipment.

Assignees

• Raytheon Co

Inventors

• Crouch David D
• Carroll Iii Alf L
• Carcone John
• Sar David R
• Feenstra Travis B

Classifications

• A61L2103/50

  Textiles, e.g. bedwear or towels · CPC title

• A61L2202/121

  Sealings, e.g. doors, covers, valves, sluices · CPC title

• A61L2202/122

  Chambers for sterilisation · CPC title

• A61L2202/11

  Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps · CPC title

• A61L2/07

  Steam · CPC title