Electronic smoking article

• US 10,966,466 B2
• Filed: 06/10/2019
• Issued: 04/06/2021
• Est. Priority Date: 02/22/2013
• Status: Active Grant

• Current Assignee: Altria Client Services LLC (Altria Group, Inc.)
• Original Assignee: Altria Client Services LLC (Altria Group, Inc.)
• Inventors: Macko, Jason Andrew, Skapars, James Anthony
• Primary Examiner(s): Yaary, Eric
• Application Number:
  US16/436,158
• Publication Number:
  US 20190320721A1
• Time in Patent Office: 666 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

Abstract

An electronic smoking article includes a liquid supply region including liquid material and a heater-wick element operable to wick liquid material and heat the liquid material to a temperature sufficient to vaporize the liquid material and form an aerosol. The heater-wick element comprises a plurality of fused metal beads or particles.

Claims

1. An electronic vaping article comprising:

a housing defining an air channel and a liquid supply region, the liquid supply region configured to hold a liquid material; and

an integral heater-wick element within the housing, the integral heater-wick element including a heatable portion and at least one wicking portion, the at least one wicking portion configured to transfer the liquid material from the liquid supply region to the heatable portion via capillary action, the heatable portion within the air channel and configured to heat the liquid material, the integral heater-wick element formed of a plurality of particles having a diameter less than 1 mm, the plurality of particles being glued together with a ceramic paste.

2. The electronic vaping article of claim 1, wherein the air channel extends through the liquid supply region.

3. The electronic vaping article of claim 1, wherein the integral heater-wick element has an electrical resistance ranging from 0.8 Ohm to 5 Ohms.

4. The electronic vaping article of claim 1, wherein the integral heater-wick element has a porosity ranging from 30% to 60%.

5. The electronic vaping article of claim 1, wherein the heatable portion and at least one wicking portion of the integral heater-wick element are formed of a same material.

6. The electronic vaping article of claim 1, wherein at least one wicking portion of the integral heater-wick element is in a form of two wicking portions, the heatable portion being between the two wicking portions.

7. The electronic vaping article of claim 6, wherein the two wicking portions extend into the liquid supply region.

8. The electronic vaping article of claim 1, wherein each of the plurality of particles has a diameter of less than 0.5 mm.

9. The electronic vaping article of claim 1, wherein the plurality of particles include at least one of metal particles, alloy particles, or coated particles.

10. The electronic vaping article of claim 1, wherein the plurality of particles are formed of at least one of a nickel aluminide or an iron aluminide.

11. The electronic vaping article of claim 1, wherein the plurality of particles are fused together.