Atomizer and aerosol delivery device

• US 10,932,490 B2
• Filed: 05/16/2018
• Issued: 03/02/2021
• Est. Priority Date: 05/16/2018
• Status: Active Grant

• Current Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Original Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Inventors: Hejazi, Vahid
• Primary Examiner(s): Harvey, James
• Application Number:
  US15/980,816
• Publication Number:
  US 20190350256A1
• Time in Patent Office: 1,021 Days
• CPC Class Codes: A24F 40/10 Devices using liquid inhalable precursors
• CPC Class Codes: A24F 40/44 Wicks
• CPC Class Codes: A24F 40/46 Shape or structure of electric heating means
• CPC Class Codes: A24F 40/485 Valves; Apertures

Abstract

An atomizer and an aerosol delivery device are described, where the atomizer has a fluid transport element formed from a rigid monolith having a first side and a second side opposite to the first side. The atomizer also has a heater. The heater provides a substantially planar heating surface. The heating surface is positioned to face the first side of the rigid monolith.

Claims

1. An atomizer comprising:

a fluid transport element comprising a rigid monolith formed from a substantially nonporous material, the rigid monolith having a first side and a second side opposite to the first side, and the rigid monolith including at least one aperture passing from the first side to the second side for providing a conduit for vaporized aerosol precursor; and

a heater,

wherein the heater comprises a substantially planar heating surface, and

wherein the heating surface is positioned to face the first side of the rigid monolith.

2. An aerosol delivery device comprising an atomizer according to claim 1.

4. The atomizer of claim 1, wherein the fluid transfer element further comprises an absorptive pad along the first side of the rigid monolith.

5. The atomizer of claim 1, wherein the rigid monolith further comprises at least one passage proximate the periphery thereof for providing a conduit for liquid aerosol precursor to travel from the second side to the first side of the rigid monolith.

6. The atomizer of claim 1, wherein the rigid monolith has a recess formed in the first side,

wherein the heating surface is positioned to face a base surface of the recess.

7. The atomizer of claim 6, wherein the rigid monolith comprises at least one aperture extending from the base surface to the second side.

8. The atomizer of claim 7, wherein the at least one aperture comprises a centrally located aperture.

9. The atomizer of claim 8, wherein the at least one aperture comprises a plurality of apertures, and the centrally located aperture has a larger diameter than the remainder of the plurality of apertures.

10. The atomizer of claim 8, wherein the base surface comprises a boss through which the centrally located aperture passes.

11. The atomizer of claim 6, wherein the recess has a depth greater than about 30% of a thickness of the rigid monolith.

12. The atomizer of claim 5, further comprising an absorptive pad positioned in the recess between the heating surface and the base surface.

13. The atomizer of claim 1, wherein the heater comprises at least one heating element selected from the group comprising a heater wire, a conductive mesh, and a conductive trace printed on a surface of a substrate.

14. The atomizer of claim 1, further comprising an insulator separate from the heater.

15. The atomizer of claim 14, wherein the insulator comprises mica.

16. The aerosol delivery device of claim 2, wherein the aerosol delivery device defines an air flow path from an air intake opening to a mouthpiece that passes along the second side of the rigid monolith.

17. The aerosol delivery device of claim 16, wherein the rigid monolith comprises at least one aperture extending from the first side to the second side, wherein the aerosol delivery device is configured such that vaporized aerosol precursor is pulled through the at least one aperture by a pressure differential created by a draw of air moving along the air flow path along the second side of the rigid monolith.

18. The aerosol delivery device of claim 16, comprising a reservoir including an aerosol precursor composition, wherein the aerosol delivery device creates an air flow path from an air intake opening to a mouthpiece that passes through the reservoir.

19. The aerosol delivery device of claim 18, wherein the rigid monolith further comprises circumferential grooves formed in the second side thereof, the grooves configured to help seal the rigid monolith to the reservoir.

3. An atomizer comprising:

a fluid transport element comprising a rigid monolith, the rigid monolith having a first side with a recess formed therein and a second side opposite to the first side; and

a heater,

wherein the heater comprises a substantially planar heating surface, and

wherein the heating surface is positioned to face the first side of the rigid monolith so as to face a base surface of the recess.