Tobacco – Tobacco users' appliance – Device used for smoking
Patent
1996-02-16
1998-10-13
Lewis, Aaron J.
Tobacco
Tobacco users' appliance
Device used for smoking
131194, 131196, 1311981, A24F 110
Patent
active
058197567
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention discloses a device for inhaling an inhalable substance.
BACKGROUND OF THE INVENTION
The consumption of tobacco products by choice is a common form of recreational/social drug use. The smoking of tobacco does, however, entail the ingestion (through the respiratory system) of typical toxic by-products. Smokeable products develop these by-products at combustion temperatures of 800-1000 degrees centigrade; they consist of tar, condensate or heavily volatile carcinogenes as well as carbon monoxide and other toxic inorganic substances- heavy metals, for example; all in constrast to the usually mostly minimal toxic content of the drug itself. Experiments have shown that the release of alkaloids and active products (for example nicotine) which contribute to the enjoyment of smoking occur at temperatures as low as 100 degrees centigrade.
Such devices can also be used in the interests of health (the treatment of addiction to cigarettes, for example) by introducing pharmaceutically effective aerosols (released from substances reached by the air stream) to the air flow during the heating process. Hereinafter, "smoking product" refers to any smokeable product, including pharmaceutically effective aerosols.
A device already exists, namely the application number EP-A2 358002 or the DE-U-92 18 005.1, which heats the smoking product by means of a gas flow, preferably air, which has been electrically preheated. A battery-powered resistance heater has been provided for this purpose. The smoking product is convection heated to a temperature lower than that at which combustion occurs and harmful substances are able to form, or to a temperature at which the formation of these substances Is reduced, thus facilitating smoking enjoyment by releasing the relevant stimulating aerosols.
In the aformentioned device the smoking product is compressed to a cylindrical mass and heated air flows lenghtwise through the mass, always in the same direction. It should also be noted that it is not possible to move this mass--which varies from lightly to heavily compressed--in relation to the heated gas/fluid or the electrical heating source.
The disadvantage is that the heated air affects only the directly exposed surface areas of the smoking product and is thus able to heat only this surface area to the desired temperature, i.e. that at which aerosols are released which contribute to the enjoyment of smoking. After longer periods of exposure to the heated air, the smoking product can become subject to localised overheating. This overheating can in turn lead to carbonisation and combustion and the attendant possibility of the formation of toxic substances. Furthermore, the product will remain only partially consumed, since the greater part of It will not have been heated to a sufficient temperature. This not only leads to higher energy consumption (since the periods during which the product is heated are independent from the smoke's flow rate) but also to an inefficient and incomplete consumption of the product itself. Given the drawbacks of the current technology It is now the task to create a device of the aforementioned kind which enables, quite simply, a more or the most efficient consumption of a given smoking product and, more particularly, the creation of a desired smoking profile.
SUMMARY OF THE INVENTION
The invention is contingent upon the recognition that the effective and thorough exploitation of the substance from which aerosols are to be extracted is possible when the smoking product is evenly and, particularly, sequentially heated to a temperature below that at which it will combust and thus release harmful by-products. This condition in particular can be achieved if a relatively finely-distributed quantity of the smoking product--possibly in smaller discrete quantities--is convection heated by carrier gas flow, particularly air, directly onto the product in such a way as to ensure that the volume bodies of smoking product particles can be heated near the surface by the introduced carrie
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