Aerosol delivery device including a pressure-based aerosol delivery mechanism

• US 10,292,424 B2
• Filed: 05/28/2014
• Issued: 05/21/2019
• Est. Priority Date: 10/31/2013
• Status: Active Grant

• Current Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Original Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Inventors: Brammer, David Allan, Jackson, David, Flynn, Nigel John, Hunt, Eric T., Sears, Stephen Benson, Potter, Dennis Lee
• Primary Examiner(s): Campbell, Thor S
• Application Number:
  US14/289,101
• Publication Number:
  US 20150117841A1
• Time in Patent Office: 1,819 Days
• Field of Search: 392386, 392387, 392390, 392394, 392397, 392398, 392400-404
• CPC Class Codes: A24F 40/10 Devices using liquid inhalable precursors
• CPC Class Codes: A24F 40/42 Cartridges or containers for inhalable precursors
• CPC Class Codes: A24F 40/44 Wicks
• CPC Class Codes: A24F 40/48 Fluid transfer means, e.g. pumps
• CPC Class Codes: A24F 40/485 Valves; Apertures
• CPC Class Codes: A24F 40/50 Control or monitoring
• CPC Class Codes: A61M 11/007 Syringe-type or piston-type sprayers or atomisers
• CPC Class Codes: A61M 11/042 electrical
• CPC Class Codes: A61M 15/025 Bubble jet droplet ejection devices
• CPC Class Codes: A61M 15/06 Inhaling appliances shaped like cigars, cigarettes or pipes
• CPC Class Codes: A61M 2016/0024 with an on-off output signal, e.g. from a switch
• CPC Class Codes: A61M 2205/8206 battery-operated
• CPC Class Codes: F24H 1/0018 using electric energy supply
• CPC Class Codes: H05B 3/02 Details

Abstract

The present disclosure relates to aerosol delivery devices. The aerosol delivery devices include mechanisms configured to deliver an aerosol precursor composition from a reservoir to an atomizer including a heating element to produce a vapor. A pressure controller may control dispensing of the aerosol precursor composition from the reservoir based on a pressure differential between a first pressure within the reservoir and a second pressure proximate the atomizer. The first pressure within the reservoir may be substantially equal to atmospheric pressure. Alternatively, the first pressure within the reservoir may be greater than atmospheric pressure.

Claims

1. An aerosol delivery device, comprising:

a control body;

a cartridge comprising a reservoir at least partially filled with an aerosol precursor composition, the cartridge being configured to receive an airflow from the control body;

a mouthpiece;

an opening configured to receive the airflow,

an atomizer comprising a chamber and a heating element, the heating element being positioned within the chamber; and

a pressure controller configured to control dispensing of the aerosol precursor composition from the reservoir based on a pressure differential between a first pressure within the reservoir and a second pressure proximate the atomizer,

the atomizer being configured to heat the aerosol precursor composition received from the reservoir by direct contact with the heating element to produce an aerosol in the chamber, the aerosol exiting the chamber before being added to the airflow;

wherein the atomizer is positioned between and spaced apart from the opening and the mouthpiece along a longitudinal axis of the aerosol delivery device such that the opening receives the airflow upstream of the atomizer.

2. The aerosol delivery device of claim 1, wherein the first pressure within the reservoir is greater than an ambient pressure.

3. The aerosol delivery device of claim 2, wherein the pressure controller comprises a valve configured to selectively release the aerosol precursor composition from the reservoir.

4. The aerosol delivery device of claim 3, further comprising a flow sensor, wherein the valve is configured to actuate in response to a signal from the flow sensor.

5. The aerosol delivery device of claim 3, wherein the cartridge includes the valve and the atomizer.

6. The aerosol delivery device of claim 3, wherein the control body includes the valve and the atomizer.

7. The aerosol delivery device of claim 6, wherein the control body comprises a coupler and the cartridge comprises a base, the valve being in fluid communication with the reservoir when the coupler of the control body is coupled to the base of the cartridge.

8. The aerosol delivery device of claim 1, wherein the first pressure within the reservoir is substantially equal to an ambient pressure.

9. The aerosol delivery device of claim 8, wherein the pressure controller comprises a flow restrictor configured to produce the pressure differential between the first pressure within the reservoir and the second pressure proximate the atomizer.

10. The aerosol delivery device of claim 9, wherein the control body includes the flow restrictor.

11. The aerosol delivery device of claim 9, wherein the flow restrictor comprises one or more restrictor apertures.

12. The aerosol delivery device of claim 8, wherein the reservoir comprises an aerosol precursor bag.

13. The aerosol delivery device of claim 8, wherein the atomizer further comprises a fluid delivery tube configured to deliver the aerosol precursor composition from the reservoir to the heating element during application of the pressure differential and otherwise resist flow of the aerosol precursor composition to the heating element.

14. The aerosol delivery device of claim 1, wherein the cartridge comprises the mouthpiece.

15. A method for aerosolization in an aerosol delivery device, comprising:

directing an airflow from a control body through a cartridge comprising a reservoir at least partially filled with an aerosol precursor composition;

controlling dispensing of the aerosol precursor composition from the reservoir to an atomizer comprising a chamber and a heating element positioned within the chamber based on a pressure differential between a first pressure within the reservoir and a second pressure proximate the atomizer; and

heating the aerosol precursor composition dispensed from the reservoir into contact with the heating element to produce an aerosol in the chamber, the aerosol exiting the chamber before being added to the airflow,

wherein directing the airflow from the control through the cartridge comprises directing the airflow into an opening, through the control body, into the cartridge, and out through a mouthpiece,

wherein the atomizer is positioned between and spaced apart from the opening and the mouthpiece along a longitudinal axis of the aerosol delivery device such that the opening receives the airflow upstream of the atomizer.

16. The method of claim 15, wherein the first pressure within the reservoir is greater than an ambient pressure, and

wherein controlling dispensing of the aerosol precursor composition comprises selectively releasing the aerosol precursor composition from the reservoir with a valve.

17. The method of claim 16, further comprising detecting an airflow with a flow sensor,

wherein controlling dispensing of the aerosol precursor composition comprises actuating the valve in response to a signal from the flow sensor.

18. The method of claim 16, wherein selectively releasing the aerosol precursor composition from the reservoir with the valve comprises directing the aerosol precursor composition from the reservoir in the cartridge through the valve in the control body.

19. The method of claim 15, wherein an internal pressure within the reservoir is substantially equal to an ambient pressure, and

wherein controlling dispensing of the aerosol precursor composition comprises producing the pressure differential between the first pressure within the reservoir and the second pressure proximate the atomizer with a flow restrictor.

20. The method of claim 19, further comprising delivering the aerosol precursor composition through a fluid delivery tube to the heating element during application of the pressure differential and otherwise resisting flow of the aerosol precursor composition to the heating element.