Aerosol generator and method

Patent metadata

Field	Value
Publication number	US-9533319-B1
Application number	US-201414288721-A
Country	US
Kind code	B1
Filing date	May 28, 2014
Priority date	May 28, 2014
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

An aerosol generator includes a first body having a first end including an exit opening, and an oppositely positioned second end. An open channel second body is substantially positioned inside the first body and extends from the first end to the second end of the first body. An exit opening of the second body is positioned adjacent to the exit opening of the first end of the first body. An insert, which holds material to be aerosolized, is at least partially positioned inside the second body. An inlet opening receives compressed air into the first body. The compressed air flows towards the exit opening of the first end of the first body. The air flow creates a region of low pressure at the exit opening of the second body. The region of low pressure pulls the material out from the second body and aerosolizes the material. The aerosol generator is particularly effective in generating aerosols from small amounts of solid and liquid materials with minimal losses of material.

First claim

What is claimed is:

1. An aerosol generator comprising:
a first body comprising:
a first end having an exit opening; and
a second end positioned opposite to said first end;

an open channel second body substantially positioned inside said first body and extending from said first end of said first body to said second end of said first body, wherein an exit opening of said second body is positioned adjacent to said exit opening of said first end of said first body;
an insert at least partially positioned inside said second body, wherein said insert is configured to hold a material to be aerosolized and to position a fixed amount of said material adjacent said exit opening of said second body; and
an inlet opening that receives compressed air into said first body, wherein said compressed air flows towards said exit opening of said first end of said first body, wherein the air flow creates a region of low pressure at said exit opening of said second body, and wherein said region of low pressure pulls said material out from said second body and aerosolizes said material.

2. The aerosol generator of claim 1 , wherein any of said first body and said second body comprises a cylindrical tube.

3. The aerosol generator of claim 1 , wherein said insert comprises any of a tube or a flat sheet.

4. The aerosol generator of claim 1 , wherein said insert includes a groove.

5. The aerosol generator of claim 1 , wherein said material comprises a mass of less than approximately 10 mg.

6. The aerosol generator of claim 1 , wherein said material comprises any of a solid and a liquid.

7. The aerosol generator of claim 1 , wherein said exit opening of said second body is smaller than said exit opening of said first end of said first body.

8. The aerosol generator of claim 1 , wherein greater than approximately 97% of said material is aerosolized by said aerosol generator.

9. The aerosol generator of claim 1 , wherein said compressed air comprises a pressure of approximately 20 psi and comprises an air flow rate of approximately 160 Lpm, and wherein said air flow occurs for approximately one second.

10. The aerosol generator of claim 1 , wherein said inlet opening is located proximate to said second end of said first body.

11. An aerosol generator comprising:
a first tube having an open first end and a closed second end;
a second tube substantially positioned inside said first tube and comprising a continuous open channel extending from a first end to a second end of said second tube, wherein an open first end of said second tube is substantially aligned with said open first end of said first tube, and
an insert at least partially positioned inside said second tube and having an end aligned with said open first end of said second tube, wherein said insert is adapted to hold a material to be aerosolized and to position a fixed amount of said material adjacent said open first end of said second tube, wherein said insert comprises any of a tube and a flat sheet, and wherein said insert includes a groove for holding said material; and
wherein said first tube receives compressed air that flows towards said open first end of said first tube, wherein the air flow creates a region of low pressure at said open first end of said second tube, and wherein said region of low pressure pulls said material out from said second tube and aerosolizes said material.

12. The aerosol generator of claim 11 , wherein said material comprises a mass of less than approximately 10 mg.

13. The aerosol generator of claim 11 , wherein said material comprises any of a solid and a liquid.

14. The aerosol generator of claim 11 , wherein said open first end of said second tube is smaller than said open first end of said first tube.

15. The aerosol generator of claim 11 , wherein greater than approximately 97% of said material is aerosolized by the aerosol generator.

16. The aerosol generator of claim 11 , wherein said compressed air comprises a pressure of approximately 20 psi and comprises an air flow rate of approximately 160 Lpm, and wherein said air flow occurs for approximately one second.

Assignees

• U S Army Edgewood Chemical And Biological Command
• Us Army

Inventors

• Kesavan Jana S
• Bottiger Jerold R

Classifications

• B05B7/2491 Primary

  characterised by the means for producing or supplying the atomising fluid, e.g. air hoses, air pumps, gas containers, compressors, fans, ventilators, their drives · CPC title

• B05B7/2454

  the carried liquid and the main stream of carrying liquid being brought together by parallel conduits, one conduit being in the other · CPC title

• A61M2202/064

  Powder · CPC title

• A61M11/06

  of the injector type · CPC title

• B05B7/14

  designed for spraying particulate materials (B05B7/16 takes precedence) · CPC title