Smoking articles and use thereof for yielding inhalation materials

• US 9,078,473 B2
• Filed: 08/09/2011
• Issued: 07/14/2015
• Est. Priority Date: 08/09/2011
• Status: Active Grant

• Current Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Original Assignee: R J Reynolds Tobacco Company (R. J. Reynolds Tobacco)
• Inventors: Worm, Steven L., Christopherson, David G., Sears, Stephen Benson, Potter, Dennis Lee, Ampolini, Frederic Philippe, Ademe, Balager
• Primary Examiner(s): CORDRAY, DENNIS R
• Application Number:
  US13/205,841
• Publication Number:
  US 20130037041A1
• Time in Patent Office: 1,435 Days
• Field of Search: 131/191, 131/198.1, 131/199, 131/216, 131/219, 131/224, 131/329, 131/347, 131/351, 131/352, 131/365, 131359-361, 128/200.24, 128/202.21, 128/203.26, 128/203.27
• US Class Current: 1/1
• CPC Class Codes: A24F 40/10 Devices using liquid inhalable precursors
• CPC Class Codes: A24F 40/20 Devices using solid inhalable precursors
• CPC Class Codes: A24F 40/40 Constructional details, e.g. connection of cartridges and battery parts
• 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 40/50 Control or monitoring

Abstract

The present invention describes articles, such as smoking articles, that can provide an inhalable substance in a form suitable for inhalation by a consumer. The article comprises a cartridge with an inhalable substance medium therein, control housing that includes an electrical energy source and an electrical power source, and a heating member that may be located in either the cartridge or the control housing. The control housing further may include puff-actuated current actuation components and current regulation components.

Claims

1. An article that yields an inhalable substance, the article comprising:

a substantially tubular shaped cartridge body having an engaging end, an opposing mouth end configured to allow passage of the inhalable substance to a consumer, and a wall with an inner surface that defines an interior cartridge body space;

a substantially tubular shaped inhalable substance medium positioned within the cartridge body and having a wall with an inner surface and an outer surface so as to define an annular space of a specified volume between the outer surface of the inhalable substance medium wall and the inner surface of the cartridge body wall, the inhalable substance medium having a first end in proximity to the mouth end of the cartridge body and having a second end in proximity to the engaging end of the cartridge body;

an electrical heating member that is operatively positioned to provide heat to at least a segment of the inhalable substance medium sufficiently to form a vapor comprising the inhalable substance, the vapor being released from the inhalable substance medium within the annular space; and

a control housing having an end for receiving the engaging end of the cartridge body and including an electrical energy source that provides power to the electrical heating member such that when the cartridge body and the control housing are operatively connected, the inhalable substance medium and the electrical heating member align so as to allow for heating of at least a segment of the inhalable substance medium.

2. The article of claim 1, wherein the cartridge body is substantially cylindrically shaped.

3. The article of claim 1, wherein the cartridge body has a cross-section defined by a shape selected from the group consisting of round, oval, and square.

4. The article of claim 1, wherein the engaging end of the cartridge body includes an opening sufficiently sized and shaped to receive at least one component of the electrical energy source.

5. The article of claim 1, wherein the mouth end of the cartridge body is partially occluded.

6. The article of claim 1, wherein the inhalable substance medium comprises tobacco.

7. The article of claim 1, wherein the inhalable substance medium comprises a tobacco-derived material.

8. The article of claim 1, wherein the inhalable substance medium comprises an aerosol-forming material.

9. The article of claim 8, wherein the aerosol-forming material includes a tobacco-derived material.

10. The article of claim 8, wherein the aerosol-forming material comprises a polyhydric alcohol.

11. The article of claim 10, wherein the polyhydric alcohol is glycerin.

12. The article of claim 1, wherein the inhalable substance medium comprises a solid substrate, and wherein the inhalable substance is coated on the substrate, is absorbed or adsorbed in the substrate, or is a natural component of the substrate.

13. The article of claim 12, wherein the inhalable substance is a tobacco component or is a tobacco-derived material.

14. The article of claim 12, wherein the inhalable substance medium further comprises an aerosol-forming material separate from the inhalable substance that is coated thereon or absorbed or adsorbed therein.

15. The article of claim 12, wherein the inhalable substance medium comprises a slurry of tobacco and an aerosol-forming material coated on or absorbed or adsorbed in the solid substrate.

16. The article of claim 12, wherein the solid substrate is a paper material.

17. The article of claim 12, wherein the solid substrate is a tobacco-paper tube.

18. The article of claim 17, wherein the tobacco-paper tube further comprises an aerosol-forming material coated thereon or absorbed or adsorbed therein.

19. The article of claim 1, wherein the inhalable substance medium comprises a vapor barrier on one of the inner surface or the outer surface of the wall.

20. The article of claim 1, wherein the inhalable substance medium is attached to the cartridge body only at the ends of the inhalable substance medium.

21. The article of claim 1, wherein the volume of the annular space between the outer surface of the inhalable substance medium wall and the inner surface of the cartridge body wall is about 5 ml to about 100 ml.

22. The article of claim 1, wherein the cartridge body further comprises an overwrap.

23. The article of claim 1, wherein the cartridge body includes a filter material positioned in proximity to the mouth end of the cartridge body.

24. The article of claim 1, wherein the end of the control housing receiving the cartridge body comprises a chamber with an open end defined by a wall with an inner surface and an outer surface, the wall having a cross-section that is substantially similarly shaped to the cross-section of the cartridge body.

25. The article of claim 24, wherein the chamber wall includes one or more openings therein for allowing entry of ambient air into the chamber.

26. The article of claim 1, wherein the electrical energy source includes a projection.

27. The article of claim 26, wherein the projection has a length of about 10 mm to about 50 mm.

28. The article of claim 26, wherein the electrical heating member is attached to the projection on the electrical energy source.

29. The article of claim 28, where the electrical heating member is a resistance wire.

30. The article of claim 28, wherein the electrical heating member is present on the projection only along a segment of the projection having a defined length.

31. The article of claim 30, wherein the segment is in proximity to an end of the projection.

32. The article of claim 30, further comprising a heat spreading member positioned between the electrical heating member and the inhalable substance medium.

33. The article of claim 30, wherein the cartridge body is configured to index past the projection segment having the electrical heating member present thereon.

34. The article of claim 33, wherein the indexing is manually controlled by a consumer.

35. The article of claim 33, wherein the article comprises a puff actuated switch that automatically indexes the cartridge past the projection segment.

36. The article of claim 35, wherein the distance traveled by the cartridge during indexing is directly related to the duration of the puff.

37. The article of claim 28, wherein the electrical heating member is present on the projection along a segment of the projection that is about 75% to about 125% of the length of the inhalable substance medium.

38. The article of claim 28, wherein the electrical heating member is substantially in direct contact with a surface of the wall of the inhalable substance medium.

39. The article of claim 28, further comprising a heat spreading member that is substantially in direct contact with an inner surface of the wall of the inhalable substance medium.

40. The article of claim 1, wherein the electrical heating member is positioned within the cartridge body.

41. The article of claim 40, wherein the electrical heating member is substantially in direct contact with a surface of the wall of the inhalable substance medium.

42. The article of claim 40, wherein the electrical heating member is substantially in direct contact with a vapor barrier present on a surface of the wall of the inhalable substance medium.

43. The article of claim 40, where the electrical heating member is a resistance wire.

44. The article of claim 40, wherein the electrical heating member includes electrical contacts for interaction with corresponding contacts on a projection included with the electrical energy source such that when heating is activated, heating occurs along the entire length of the electrical heating member.

45. The article of claim 44, wherein the projection of the electrical energy source includes electrical leads.

46. The article of claim 45, wherein the electrical leads form an electrical connection with discrete segments of the electrical heating member such that when heating occurs, only a portion of the inhalable substance medium in proximity to the segment of the electrical heating member in electrical connection with the projection is heated.

47. The article of claim 46, wherein the segment of the electrical heating member that is in electrical connection with the electrical leads of the projection encompasses about 5% to about 50% of the length of the inhalable subject medium.

48. The article of claim 47, wherein the segment encompasses about 5% to about 20% of the length of the inhalable subject medium.

49. The article of claim 45, wherein the cartridge body indexes past the projection segment having the electrical leads present thereon.

50. The article of claim 49, wherein the indexing is manually controlled by a consumer.

51. The article of claim 49, wherein the article comprises a puff actuated controller that automatically indexes the cartridge past the projection segment.

52. The article of claim 1, wherein the electrical heating member comprises a plurality of individual heater elements that individually provide heat to corresponding, individual segments of the inhalable substance medium.

53. The article of claim 1, wherein the electrical heating member is an electrically conductive material with a defined resistance that is integrally formed with the inhalable substance medium.

54. The article of claim 53, wherein the electrical energy source includes a component for conducting electrical energy to the electrically conductive material integral to the inhalable substance medium.

55. The article of claim 1, wherein the electrical energy source includes a battery.

56. The article of claim 1, wherein the electrical energy source includes a capacitor.

57. The article of claim 1, wherein the electrical heating member has a working temperature of about 120°

C. to about 300°

C.

58. The article of claim 1, wherein the article comprises a component that actuates current flow from the electrical energy source to the electrical heating member.

59. The article of claim 58, wherein the component comprises a puff-actuated switch.

60. The article of claim 58, wherein the component comprises a pushbutton.

61. The article of claim 1, wherein the article comprises a component that regulates a previously initiated current flow from the electrical energy source to the electrical heating member.

62. The article of claim 61, wherein the current regulating component is a time-based component.

63. The article of claim 61, wherein the current regulating component stops current to the electrical heating member once a defined temperature has been achieved.

64. The article of claim 61, wherein the current regulating component cycles the current to the electrical heating member off and on once a defined temperature has been achieved so as to maintain the defined temperature for a defined period of time.

65. The article of claim 1, wherein the cartridge body includes a flow path therethrough such that fluid passage along the length of the cartridge body including the inhalable substance medium is substantially limited to passage through the annular space between the inner surface of the cartridge body wall and the outer surface of the inhalable substance medium wall.

66. The article of claim 1, wherein an end of the inhalable substance medium is attached to the engaging end of the cartridge and includes one or more openings between the annular space and the engaging end of the cartridge, said one or more openings allowing for air flow into the annular space.

67. An article that yields an inhalable substance, the article comprising:

a substantially tubular shaped cartridge body;

a substantially tubular shaped inhalable substance medium with an interior space, the inhalable substance medium being positioned within the cartridge body so as to define an annular space between the inhalable substance medium and the cartridge body;

an electrical heating member that is operatively positioned within the interior space of the inhalable substance medium so as to heat at least a segment of the inhalable substance medium sufficiently to form a vapor comprising the inhalable substance within the annular space; and

a control housing having an end for receiving the cartridge body and including an electrical energy source that provides power to the electrical heating member such that when the cartridge body and the control housing are operatively connected, the inhalable substance medium and the electrical heating member align so as to allow for heating of at least a segment of the inhalable substance medium.

68. The article of claim 67, further comprising a vapor barrier associated with the inhalable substance medium so as to be operatively positioned between the inhalable substance medium and the electrical heating member.

69. A disposable unit for use with a reusable smoking article, the disposable unit comprising:

a substantially tubular shaped cartridge body having an engaging end configured to engage the reusable smoking article and an opposing mouth end configured to allow passage of an inhalable substance to a consumer;

a substantially tubular shaped inhalable substance medium positioned within an interior space of the cartridge body so as to define an annular space between the inhalable substance medium and the cartridge body, the inhalable substance medium having a first end in proximity to the mouth end of the cartridge body and having a second end in proximity to the engaging end of the cartridge body.

70. The disposable unit of claim 69, further comprising an electrical heating member that heats at least a segment of the inhalable substance medium sufficiently to form a vapor comprising the inhalable substance within the annular space.

71. The disposable unit of claim 70, wherein the electrical heating member further comprises contacts for making electrical connection with an electrical energy source in the reusable smoking article.

72. The disposable unit of claim 70, wherein the electrical heating member is positioned within the tubular shaped inhalable substance medium.

73. The disposable unit of claim 70, wherein the electrical heating member is in direct contact with the inhalable substance medium.

74. The disposable unit of claim 69, further comprising an overwrap that surrounds the cartridge body.

75. The disposable unit of claim 74, wherein the overwrap extends beyond the engaging end of the cartridge body.

76. The disposable unit of claim 75, wherein the distance the overwrap extends beyond the engaging end of the cartridge body is about 10% to about 90% of the length of the cartridge body.

77. The disposable unit of claim 74, further comprising a filter material positioned in proximity to the mouth end of the cartridge body.

78. A kit comprising:

a case that accommodates one or more further kit components;

one or more disposable units for use with a reusable smoking article, the disposable unit comprising;

a substantially tubular shaped cartridge body having an engaging end configured to engage the reusable smoking article and an opposing mouth end configured to allow passage of an inhalable substance to a consumer; and

a substantially tubular shaped inhalable substance medium positioned within an interior space of the cartridge body so as to define an annular space between the inhalable substance medium and the cartridge body, the inhalable substance medium having a first end in proximity to the mouth end of the cartridge body and having a second end in proximity to the engaging end of the cartridge body; and

optionally one or more components selected from the group consisting of a reusable control unit, a battery, and a charging component.

79. The kit of claim 78, wherein the reusable control unit comprises a control housing including:

a receiving end for receiving an engaging end of the disposable unit and including an electrical energy source that delivers power to an electrical heating member, the electrical energy source including a projection extending outwardly therefrom and including a component that forms an electrical connection with electrical contacts on the electrical heating member; and

a control unit section that houses a power source, a switching component that actuates flow of electrical current from the electrical energy source to the heating member, and a flow regulating component that regulates a previously initiated current flow from the electrical energy source to the electrical heating member.