Aerosol delivery device, and associated apparatus and method of formation thereof

• US 10,028,534 B2
• Filed: 04/20/2016
• Issued: 07/24/2018
• Est. Priority Date: 04/20/2016
• Status: Active Grant

• Current Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Original Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Inventors: Sur, Rajesh
• Primary Examiner(s): HARVEY, JAMES R
• Application Number:
  US15/133,916
• Publication Number:
  US 20170303586A1
• Time in Patent Office: 825 Days
• CPC Class Codes: A24F 40/10 Devices using liquid inhalable precursors
• CPC Class Codes: A24F 40/46 Shape or structure of electric heating means
• CPC Class Codes: A24F 40/50 Control or monitoring
• CPC Class Codes: A24F 40/70 Manufacture
• CPC Class Codes: H01C 7/048 Carbon or carbides
• CPC Class Codes: H05B 2203/013 Heaters using resistive films or coatings
• CPC Class Codes: H05B 2203/021 Heaters specially adapted for heating liquids
• CPC Class Codes: H05B 2203/022 Heaters specially adapted for heating gaseous material
• CPC Class Codes: H05B 3/0014 Devices wherein the heating current flows through particular resistances
• CPC Class Codes: H05B 3/145 Carbon only, e.g. carbon black, graphite
• CPC Class Codes: H05B 3/42 non-flexible

Abstract

An aerosol delivery device is provided, and includes a control body serially engaged with a cartridge, the cartridge having an aerosol precursor source housing an aerosol precursor and defining a mouth opening configured to direct an aerosol therethrough to a user. A heater device is operably engaged with the cartridge, wherein the heater device comprises an electrically-conductive carbon element disposed adjacent to a heat-conductive substrate. The heater device is configured to receive the aerosol precursor from the aerosol precursor source onto the heat-conductive substrate, such that the aerosol precursor on the heat-conductive substrate forms the aerosol in response to heat from the electrically-conductive carbon element conducted through the heat-conductive substrate. An associated apparatus and method are also provided.

Claims

1. An aerosol delivery device, comprising:

a control body;

a cartridge serially engaged with the control body and including an aerosol precursor source housing an aerosol precursor, and defining a mouth opening configured to direct an aerosol therethrough to a user; and

a heater device operably engaged with the cartridge, between the aerosol precursor source and the mouth opening, the heater device comprising an electrically-conductive carbon element disposed adjacent to a heat-conductive substrate, the heater device being configured to receive the aerosol precursor from the aerosol precursor source onto the heat-conductive substrate, such that the aerosol precursor on the heat-conductive substrate forms the aerosol in response to heat from the electrically-conductive carbon element conducted through the heat-conductive substrate.

2. The device of claim 1, comprising a delivery device operably engaged between the aerosol precursor source and the heat-conductive substrate, the delivery device being configured to deliver the aerosol precursor from the aerosol precursor source and onto the heat-conductive substrate.

3. The device of claim 1, wherein the electrically-conductive carbon element comprises an electrically conductive graphene element.

4. The device of claim 1, wherein the electrically-conductive carbon element comprises an electrically conductive square graphene sheet.

5. The device of claim 1, comprising an electrical circuit engaged with the carbon element, the carbon element being a resistive element configured to generate heat in response to application of an electrical current from the electrical circuit.

6. The device of claim 1, wherein the aerosol precursor source is configured to dispense the aerosol precursor on a surface of the heat-conductive substrate, the surface of the heat-conductive substrate being opposite to the carbon element and directed toward the mouth opening.

7. The device of claim 2, wherein the delivery device comprises a pump apparatus or a wick arrangement.

8. The device of claim 1, wherein the heat-conductive substrate comprises a heat-conductive glass, a thermally-conductive dielectric material, or a heat-conductive composite material.

9. The device of claim 1, wherein the carbon element is disposed between two layers of the heat-conductive substrate.

10. The device of claim 1, wherein the heat-conductive substrate is disposed perpendicularly to a longitudinal axis of the cartridge.

11. The device of claim 1, wherein the heat-conductive substrate is configured as a hollow cylinder defining an inner channel, and wherein the carbon element is engaged with an outer surface of the hollow cylinder.

12. The device of claim 11, wherein the carbon element partially extends about the outer surface of the hollow cylinder such that a remaining surface of the hollow cylinder not engaged with the carbon element is directed toward the mouth opening.

13. The device of claim 1, wherein the carbon element is disposed between two concentric hollow cylinders of the heat-conductive substrate.

14. The device of claim 11, comprising a delivery device operably engaged between the aerosol precursor source and the heat-conductive substrate, the delivery device being a capillary in fluid communication with the aerosol precursor source and extending into the inner channel of the hollow cylinder, the delivery device being configured to deliver the aerosol precursor from the aerosol precursor source and onto the heat-conductive substrate within the inner channel.

15. The device of claim 14, wherein the capillary is configured to siphon the aerosol precursor from the aerosol precursor source, and to dispense the aerosol precursor through an outlet end thereof onto an inner surface of the hollow cylinder defining the inner channel.

16. The device of claim 14, wherein the hollow cylinder is configured to define at least one pore extending from the inner channel through to the outer surface, the at least one pore being configured and arranged such that aerosol formed by the aerosol precursor dispensed onto the inner surface of the hollow cylinder, in response to heat from the electrically-conductive carbon element conducted through the heat-conductive substrate, is dispensed through the at least one pore toward the mouth opening.

17. The device of claim 1, wherein the carbon element is configured to have a resistance of 3 Ohms/square unit.

18. An aerosol formation apparatus, comprising:

an aerosol precursor source housing an aerosol precursor;

a heater device including an electrically-conductive carbon element disposed adjacent to a heat-conductive substrate, the heater device being configured to receive the aerosol precursor from the aerosol precursor source onto the heat-conductive substrate, such that the aerosol precursor on the heat-conductive substrate forms the aerosol in response to heat from the electrically-conductive carbon element conducted through the heat-conductive substrate.

19. The apparatus of claim 18, comprising a delivery device operably engaged between the aerosol precursor source and the heat-conductive substrate, the delivery device being configured to deliver the aerosol precursor from the aerosol precursor source and onto the heat-conductive substrate.

20. The apparatus of claim 18, wherein the electrically-conductive carbon element comprises an electrically conductive graphene element.

21. The apparatus of claim 18, wherein the electrically-conductive carbon element comprises an electrically conductive square graphene sheet.

22. The apparatus of claim 18, comprising an electrical circuit engaged with the carbon element, the carbon element being a resistive element configured to generate heat in response to application of an electrical current from the electrical circuit.

23. The apparatus of claim 18, wherein the aerosol precursor source is configured to dispense the aerosol precursor on a surface of the heat-conductive substrate, the surface of the heat-conductive substrate being opposite to the carbon element.

24. The apparatus of claim 19, wherein the delivery device comprises a pump apparatus or a wick arrangement.

25. The apparatus of claim 18, wherein the heat-conductive substrate comprises a heat-conductive glass, a thermally-conductive dielectric material, or a heat-conductive composite material.

26. The apparatus of claim 18, wherein the carbon element is disposed between two layers of the heat-conductive substrate.

27. The apparatus of claim 18, wherein the heat-conductive substrate is configured as a hollow cylinder defining an inner channel, and wherein the carbon element is engaged with an outer surface of the hollow cylinder.

28. The apparatus of claim 27, wherein the carbon element partially extends about the outer surface of the hollow cylinder.

29. The apparatus of claim 18, wherein the carbon element is disposed between two concentric hollow cylinders of the heat-conductive substrate.

30. The apparatus of claim 27, comprising a delivery device operably engaged between the aerosol precursor source and the heat-conductive substrate, the delivery device being a capillary in fluid communication with the aerosol precursor source and extending into the inner channel of the hollow cylinder, the delivery device being configured to deliver the aerosol precursor from the aerosol precursor source and onto the heat-conductive substrate within the inner channel.

31. The apparatus of claim 30, wherein the capillary is configured to siphon the aerosol precursor from the aerosol precursor source, and to dispense the aerosol precursor through an outlet end thereof onto an inner surface of the hollow cylinder defining the inner channel.

32. The apparatus of claim 30, wherein the hollow cylinder is configured to define at least one pore extending from the inner channel through to the outer surface, the at least one pore being configured and arranged such that aerosol formed by the aerosol precursor dispensed onto the inner surface of the hollow cylinder, in response to heat from the electrically-conductive carbon element conducted through the heat-conductive substrate, is dispensed through the at least one pore.

33. The apparatus of claim 18, wherein the carbon element is configured to have a resistance of 3 Ohms/square unit.

34. A method of forming an aerosol delivery device, comprising:

operably engaging an aerosol precursor source housing an aerosol precursor with a heater device including an electrically-conductive carbon element disposed adjacent to a heat-conductive substrate, the heater device being configured to receive the aerosol precursor from the aerosol precursor source onto the heat-conductive substrate, such that the aerosol precursor on the heat-conductive substrate forms the aerosol in response to heat from the electrically-conductive carbon element conducted through the heat-conductive substrate.

35. The method of claim 34, comprising operably engaging a delivery device between the aerosol precursor source and the heat-conductive substrate, the delivery device being configured to deliver the aerosol precursor from the aerosol precursor source and onto the heat-conductive substrate.

36. The method of claim 34, wherein operably engaging an aerosol precursor source with a heater device comprises operably engaging an aerosol precursor source with a heater device having the electrically-conductive carbon element comprising an electrically conductive graphene element.

37. The method of claim 34, wherein operably engaging an aerosol precursor source with a heater device comprises operably engaging an aerosol precursor source with a heater device having the electrically-conductive carbon element comprising an electrically conductive square graphene sheet.

38. The method of claim 34, comprising engaging an electrical circuit with the carbon element, the carbon element being a resistive element configured to generate heat in response to application thereto of an electrical current from the electrical circuit.

39. The method of claim 34, wherein operably engaging an aerosol precursor source with a heater device comprises operably engaging an aerosol precursor source with a heater device such that the aerosol precursor source is configured to dispense the aerosol precursor on a surface of the heat-conductive substrate, the surface of the heat-conductive substrate being opposite to the carbon element.

40. The method of claim 35, wherein operably engaging a delivery device comprises operably engaging a delivery device, comprising a pump apparatus or a wick arrangement, between the aerosol precursor source and the heat-conductive substrate.

41. The method of claim 34, wherein operably engaging an aerosol precursor source with a heater device comprises operably engaging an aerosol precursor source with a heater device having the heat-conductive substrate comprising a heat-conductive glass, a thermally-conductive dielectric material, or a heat-conductive composite material.

42. The method of claim 34, wherein operably engaging an aerosol precursor source with a heater device comprises operably engaging an aerosol precursor source with a heater device having the carbon element is disposed between two layers of the heat-conductive substrate.

43. The method of claim 34, wherein operably engaging an aerosol precursor source with a heater device comprises operably engaging an aerosol precursor source with a heater device having the heat-conductive substrate configured as a hollow cylinder defining an inner channel, and having the carbon element engaged with an outer surface of the hollow cylinder.

44. The method of claim 43, comprising engaging the carbon element with the outer surface of the hollow cylinder such that the carbon element partially extends about the outer surface of the hollow cylinder.

45. The method of claim 34, wherein operably engaging an aerosol precursor source with a heater device comprises operably engaging an aerosol precursor source with a heater device having the carbon element disposed between two concentric hollow cylinders of the heat-conductive substrate.

46. The method of claim 43, comprising operably engaging a delivery device between the aerosol precursor source and the heat-conductive substrate, the delivery device being a capillary in fluid communication with the aerosol precursor source and extending into the inner channel of the hollow cylinder, such that the delivery device is configured to deliver the aerosol precursor from the aerosol precursor source and onto the heat-conductive substrate within the inner channel.

47. The method of claim 46, comprising engaging a capillary in fluid communication with the aerosol precursor source, the capillary being configured to extend into the inner channel of the hollow cylinder to siphon the aerosol precursor from the aerosol precursor source, and to dispense the aerosol precursor through an outlet end thereof onto an inner surface of the hollow cylinder defining the inner channel.

48. The method of claim 46, wherein the hollow cylinder is configured to define at least one pore extending from the inner channel through to the outer surface, and the method comprises arranging the at least one pore such that aerosol formed by the aerosol precursor dispensed onto the inner surface of the hollow cylinder, in response to heat from the electrically-conductive carbon element conducted through the heat-conductive substrate, is dispensed through the at least one pore.

49. The method of claim 34, wherein operably engaging an aerosol precursor source with a heater device comprises operably engaging an aerosol precursor source with a heater device having the carbon element configured to have a resistance of 3 Ohms/square unit.

50. The method of claim 34, comprising serially engaging a control body with a cartridge housing the aerosol precursor source, and defining a mouth opening configured to direct an aerosol therethrough to a user.

51. The method of claim 50, comprising engaging the heater device with the cartridge such that the heat-conductive substrate is disposed perpendicularly to a longitudinal axis of the cartridge.