Aerosol delivery device including a ceramic wicking element

• US 10,470,499 B2
• Filed: 06/17/2019
• Issued: 11/12/2019
• Est. Priority Date: 04/27/2017
• Status: Active Grant

• Current Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Original Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Inventors: Clemens, David A., Carpenter, William Kevin, Davis, Michael F.
• Primary Examiner(s): Dinh, Phuong K
• Application Number:
  US16/443,398
• Publication Number:
  US 20190297948A1
• Time in Patent Office: 148 Days
• Field of Search: 131328-329
• 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 40/44 Wicks
• CPC Class Codes: A24F 40/485 Valves; Apertures
• CPC Class Codes: H05B 1/0244 Heating of fluids H05B1/0247 takes precedence
• CPC Class Codes: H05B 2203/014 Heaters using resistive wires or cables not provided for in H05B3/54
• 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 3/04 Waterproof or air-tight seals for heaters
• CPC Class Codes: H05B 3/42 non-flexible

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 vapor-forming units for aerosol delivery devices, the vapor-forming units including a ceramic wick that is in contact with a heater and in contact with an aerosol precursor composition. The vapor-forming units are connectable to a power unit.

Claims

1. A cartridge of an aerosol delivery device, the cartridge comprising:

an outer housing formed of a wall;

a mouthpiece positioned at a first end of the outer housing;

a base member positioned at a second end of the outer housing;

a flow tube positioned interior to the wall of the outer housing, the flow tube having a first end that is arranged proximate to the first end of the outer housing and having a second, opposing end;

a reservoir configured for holding an aerosol precursor composition and defined between the flow tube and the wall of the outer housing;

an atomizer arranged proximate to the second, opposing end of the flow tube, the atomizer comprising a heating member and a ceramic member, the ceramic member being configured for fluid communication of the aerosol precursor composition therethrough from the reservoir to the heating member; and

at least one sealing member configured to substantially prevent passage of the aerosol precursor composition from the reservoir into the flow tube without substantially preventing the fluid communication of the aerosol precursor composition through the ceramic member from the reservoir.

2. The cartridge of claim 1, wherein the at least one sealing member is positioned between the ceramic member and a portion of the flow tube.

3. The cartridge of claim 2, wherein the at least one sealing member engages the flow tube proximate the second, opposing end thereof.

4. The cartridge of claim 1, wherein the at least one sealing member is a first sealing member, and wherein the cartridge comprises a second sealing member.

5. The cartridge of claim 4, wherein the second sealing member is positioned between the atomizer and the base member.

6. The cartridge of claim 1, wherein the at least one sealing member is a silicone member.

7. The cartridge of claim 1, wherein the base member is adapted to facilitate a stable connection between the cartridge and a power unit.

8. The cartridge of claim 7, wherein the stable connection between the cartridge and the power unit is a magnetic fit.

9. The cartridge of claim 7, further comprising an airflow passage through the cartridge, the airflow passage extending through the base member, the flow tube, and the mouthpiece and extending at least partially around the atomizer.

10. The cartridge of claim 1, wherein the ceramic member includes a hollow portion.

11. The cartridge of claim 1, further comprising electrical terminals extending through the base member and configured for electrical connection with the heating member.

12. The cartridge of claim 1, wherein the ceramic member is substantially solid.

13. The cartridge of claim 1, wherein the heating member is a resistance heating wire positioned at an exterior surface of the ceramic member.

14. The cartridge of claim 1, wherein the atomizer is positioned between the base member and the second, opposing end of the flow tube.