Aerosol delivery device with improved fluid transport

• US 10,194,694 B2
• Filed: 01/05/2016
• Issued: 02/05/2019
• Est. Priority Date: 01/05/2016
• Status: Active Grant

• Current Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Original Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Inventors: Davis, Michael F., Garcia, Ercilia Hernandez, Hubbard, Sawyer, Phillips, Percy D., Rogers, James William, Sears, Stephen Benson, Sebastian, Andries Don, Taluskie, Karen V.
• Primary Examiner(s): CAMPBELL, THOR S
• Application Number:
  US14/988,109
• Publication Number:
  US 20170188626A1
• Time in Patent Office: 1,127 Days
• Field of Search: None
• CPC Class Codes: A24F 40/10 Devices using liquid inhalable precursors
• CPC Class Codes: A24F 40/40 Constructional details, e.g. connection of cartridges and battery parts
• CPC Class Codes: A24F 40/42 Cartridges or containers for inhalable precursors
• CPC Class Codes: A24F 40/44 Wicks
• CPC Class Codes: A24F 40/46 Shape or structure of electric heating means

Abstract

The present disclosure relates to aerosol delivery devices, methods of forming such devices, and elements of such devices. In some embodiments, the present disclosure provides devices configured for vaporization of an aerosol precursor composition that is stored in and/or transported to a heater by a porous monolith, which can be, for example, a porous glass or a porous ceramic. A heater can be in a heating arrangement with an external portion of the porous monolith or can be substantially internal to the porous monolith.

Claims

1. An aerosol delivery device comprising:

an outer housing;

a reservoir containing a liquid, wherein the reservoir is formed of porous glass, the reservoir having a wall;

a heater configured to vaporize the liquid; and

a liquid transport element configured to provide the liquid to the heater, wherein the liquid transport element is a fibrous wick, wherein one or more portions of the fibrous wick are in fluid connection with the reservoir wall, wherein the reservoir wall includes one or more grooves, and wherein the one or more grooves have a porosity that is different from the porosity of the remaining portions of the reservoir wall.

2. The aerosol delivery device according to claim 1, wherein the heater is printed on the liquid transport element or annealed to the liquid transport element.

3. The aerosol delivery device according to claim 1, wherein the heater is in a radiant heating arrangement with the liquid transport element.

4. The aerosol delivery device according to claim 1, wherein at least a portion of the liquid transport element is substantially planar, and wherein the heater is at least partially positioned on the substantially planar portion of the liquid transport element.

5. The aerosol delivery device according to claim 1, wherein the porous glass comprises one or more etchings.

6. The aerosol delivery device according to claim 1, wherein the reservoir is substantially shaped as a cylinder having a wall.

7. The aerosol delivery device according to claim 6, wherein the reservoir is substantially shaped as a hollow cylinder.

8. The aerosol delivery device according to claim 1, wherein the outer housing comprises an air entry and comprises a mouthend with an aerosol port.

9. The aerosol delivery device according to claim 1, wherein the device further comprises one or more of an electrical power source, a pressure sensor, and a microcontroller.

10. The aerosol delivery device according to claim 9, wherein one or more of the electrical power source, the pressure sensor, and the microcontroller are positioned within a separate control housing that is connectable with the outer housing.

11. An atomizer comprising:

a vapor substrate formed of a porous monolith and configured for transport of a liquid aerosol precursor composition;

a reservoir formed of a porous monolith connected to the vapor substrate; and

a heater in a heating arrangement with the vapor substrate, wherein at least a portion of the heater is internal to and in direct contact with at least a portion of the vapor substrate.

12. The atomizer according to claim 11, wherein the vapor substrate has a first porosity, and the reservoir has a second porosity that is different form the first porosity.

13. The atomizer according to claim 11, wherein one or both of the vapor substrate and the reservoir includes one or more etchings.

14. The atomizer according to claim 11, wherein:

one or both of the vapor substrate and the reservoir is a porous glass;

one or both of the vapor substrate and the reservoir is a porous ceramic;

or

one of the vapor substrate and the reservoir is a porous glass, and the other of the vapor substrate and the reservoir is a porous ceramic.

15. The atomizer according to claim 11, wherein the porous monolith is a porous glass or a porous ceramic.

16. The atomizer according to claim 11, wherein the vapor substrate is substantially planar.

17. The atomizer according to claim 11, wherein the vapor substrate is substantially in the form of a hollow tube or the vapor substrate includes a channel formed therein.