Atomizer for an aerosol delivery device and related input, aerosol production assembly, cartridge, and method

• US 9,918,495 B2
• Filed: 02/28/2014
• Issued: 03/20/2018
• Est. Priority Date: 02/28/2014
• Status: Active Grant

• Current Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Original Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Inventors: DePiano, John, Smith, David, Coppola, Patsy, Novak, III, Charles Jacob, Alderman, Steven Lee, McClellan, James William, Wolber, John William, Silveira, Frank S., Laine, Michael, Brinkley, Paul A., Dooly, Grady Lance
• Primary Examiner(s): Angwin, David
• Assistant Examiner(s): Bae, Gyounghyun
• Application Number:
  US14/194,233
• Publication Number:
  US 20150245659A1
• Time in Patent Office: 1,481 Days
• Field of Search: 219544
• 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 40/70 Manufacture
• CPC Class Codes: B21D 53/06 of metal tubes
• CPC Class Codes: F22B 1/282 with water or steam circulating in tubes or ducts
• CPC Class Codes: H01C 17/02 adapted for manufacturing resistors with envelope or housing
• CPC Class Codes: H01C 17/04 adapted for winding the resistive element
• CPC Class Codes: Y10T 29/49083 Heater type
• CPC Class Codes: Y10T 29/4935 Heat exchanger or boiler making

Abstract

The present disclosure relates to atomizers for an aerosol delivery device such as a smoking article. The atomizer may include a liquid transport element and a wire extending along at least a portion of a longitudinal length thereof. The wire may define contact portions configured to engage heater terminals and a heating portion configured to produce heat. The heating portion may include a variable coil spacing. In other atomizers, the wire may extend at least partially through the liquid transport element proximate the contact portions. Related inputs, cartridges, aerosol production assemblies, and methods of forming atomizers are also provided.

Claims

1. An aerosol production assembly for an aerosol delivery device, the aerosol production assembly comprising:

a reservoir substrate configured to hold an aerosol precursor composition; and

an atomizer in contact with the reservoir substrate, the atomizer comprising;

a U-shaped wick configured to transport liquid thereabout, the U-shaped wick extending between a first wick end and a second wick end; and

a wire extending along at least one portion of the U-shaped wick and defining a heater comprising a plurality of coils of the wire forming a heating portion on the at least one portion of the U-shaped wick at which the coils define a variable pitch wound around the at least one portion of the U-shaped wick, the wire being supported by tabs, the heating portion defining the variable pitch being disposed between the tabs; and

a flow director defining an aperture extending therethrough, the aperture being aligned with a center section of the heating portion of the heating element.

2. The aerosol production assembly of claim 1, wherein the wire continuously extends from the first wick end to the second wick end.

3. The aerosol production assembly of claim 1, wherein the wire extends at least partially through the U-shaped wick at one or both of first and second wire ends.

4. The aerosol production assembly of claim 1, wherein the variable pitch of the coils is greatest at a plurality of outer sections and smallest between the outer sections at the center section.

5. The aerosol production assembly of claim 1, wherein the heating element further comprises a plurality of contact portions, the heating portion being positioned between the contact portions.

6. The aerosol production assembly of claim 5, wherein the wire further defines a plurality of end portion coils defining a first pitch, the contact portions being positioned between the end portion coils and defining a second pitch that is less than the first pitch.

7. The aerosol production assembly of claim 5, further comprising a first heater terminal and a second heater terminal, wherein the contact portions of the heating element respectively contact one of the first heater terminal and the second heater terminal.