Electronic smoking article

• US 10,349,683 B2
• Filed: 06/04/2018
• Issued: 07/16/2019
• 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:
  US15/997,324
• Publication Number:
  US 20180279686A1
• Time in Patent Office: 407 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 configured to transfer the liquid material from the liquid supply region to the air channel via capillary action, the integral heater-wick element formed of a plurality of particles and including a heatable portion and at least one wicking portion, the at least one wicking portion extending into the liquid supply region, the heatable portion of the integral heater-wick element extending into the air channel and configured to vaporize the liquid material, the at least one wicking portion including a first wicking portion, a second wicking portion, a third wicking portion, and a fourth wicking portion, the first wicking portion and the second wicking portion disposed at one end of the heatable portion, and the third wicking portion and the fourth wicking portion disposed at an opposing end of the heatable portion.

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

3. The electronic vaping article of claim 1, wherein the integral heater-wick element has a porosity ranging from 40% to 50%.

4. The electronic vaping article of claim 1, wherein each of the plurality of particles has a diameter of less than about 0.25 mm.

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

6. 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.

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

8. The electronic vaping article of claim 1, wherein the housing includes an outer tube and an inner tube within the outer tube, the inner tube defining the air channel, the outer tube and the inner tube defining the liquid supply region in between.

9. The electronic vaping article of claim 1, further comprising:

at least one electrical lead connected to the integral heater-wick element, the electrical lead disposed in the liquid supply region.

10. The electronic vaping article of claim 1, wherein the plurality of particles include beads.