Flavor-generating device

• US 6,155,268 A
• Filed: 07/23/1998
• Issued: 12/05/2000
• Est. Priority Date: 07/23/1997
• Status: Expired due to Fees

• Current Assignee: Japan Tobacco Inc.
• Original Assignee: Japan Tobacco Inc.
• Inventors: Takeuchi, Manabu
• Primary Examiner(s): Derrington, James
• Assistant Examiner(s): MCBRIDE, ROBERT E
• Application Number:
  US09/120,457
• Time in Patent Office: 866 Days
• Field of Search: 131/335, 131/271, 131/273, 131/194, 131/336, 131/272
• US Class Current: 131/273
• 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 40/46 Shape or structure of electric heating means
• CPC Class Codes: A24F 40/485 Valves; Apertures
• CPC Class Codes: A61M 11/042 electrical
• CPC Class Codes: A61M 2016/0024 with an on-off output signal, e.g. from a switch

Abstract

A flavor-generating device includes a chamber having an air inlet port and a flavor inhalation port, and defining a gas passageway between the air inlet port and the inhalation port. A liquid container for storing a liquid flavor source is provided, and is maintained at substantially an atmospheric pressure. At least one liquid passageway is provided in fluid communication with the liquid flavor source at its first end portion and with the gas passageway at its second end portion. The liquid passageway transports the liquid flavor source therethrough by capillary force. A heater heats and evaporates the liquid flavor source at the second end portion of the liquid passageway.

Claims

1. A flavor-generating device comprising:

a chamber having an air inlet port for introducing the air thereinto and an inhalation port through which a user inhales a flavor, and defining a gas passageway between the air inlet port and the inhalation port;

a liquid container for storing a liquid containing a flavor substance, and maintained at substantially an atmospheric pressure;

at least one liquid passageway having a first end portion which is in a fluid communication with the liquid and a second end portion which is in a fluid communication with the gas passageway, for transporting the liquid from the liquid container to the second end portion by capillary force, the capillary force being created predominantly by the attraction between the liquid containing a flavor substance and an interior of the liquid passageway; and

a heater mounted at the second end portion of the at least one liquid passageway, for heating and gasifying the liquid transported from the liquid container, the heater heating and gasifying said liquid while it is disposed in said second end portion, thereby forming a gaseous stream of said liquid exiting said second end portion into said chamber for inhalation through said inhalation port.

2. The device according to claim 1, wherein said at least one liquid passageway includes at least one capillary tube.

3. The device according to claim 1, wherein said at least one liquid passageway includes at least one pair of substantially planar elements spaced apart from each other.

4. The device according to claim 1, wherein said at least one liquid passageway includes an intercommunicating pore structure filled in an enclosure.

5. The device according to claim 1, wherein said heater is mounted at the tip end of the at least one liquid passageway.

6. The device according to claim 1, wherein said at least one liquid passageway includes a plurality of liquid passageways, each passageway including a capillary tube equipped with a heater.

7. The device according to claim 1, further comprising detecting means for detecting the inhaling action of a user;

and control means for controlling the heater such that said heater is driven upon inhaling action of the user.

8. The device according to claim 1, wherein said air passageway is formed to permit the air to be introduced selectively toward the second end portion of the at least one liquid passageway.

9. The device according to claim 1, wherein said liquid container is exchangeably mounted.

10. The device according to claim 2, wherein said at least one capillary tube has a diameter of between about 0.01 mm and 3 mm.

11. The device according to claim 10, wherein said at least one capillary tube has a diameter of between about 0.05 mm and 1 mm.

12. The device according to claim 2, wherein said liquid container has an opening for access by said at least one capillary tube into said container, and an opening exposed to ambient atmospheric pressure, the opening to ambient atmospheric pressure allowing atmospheric pressure to be maintained within said container.

13. The device according to claim 2, wherein said heater includes an annular element disposed at the second end portion of each at least one capillary tube.

14. The device according to claim 2, wherein said heater is a cylindrical element.

15. The device according to claim 2, wherein said heater includes at least one planar element, one planar element extending across a diameter of each said at least one capillary tube.

16. The device according to claim 6, further comprising a heater frame partially surrounding the second end portion of each of said plurality of capillary tubes.

17. The device according to claim 3, wherein the space between each said pair of substantially planar elements is partially closed by a film placed on sides of the planar elements, with the second end of the at least one liquid passageway remaining open.

18. The device according to claim 3, wherein the heater includes heating elements provided on opposed faces of each said at least one pair of substantially planar elements.