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US 5,593,792 AGranted
Electrochemical heat source
AssigneeR. J. Reynolds Tobacco Company
InventorsErnest G. Farrier, Joseph J. Chiou, Richard L. Lehman, Chandra K. Banerjee
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AssigneeR. J. Reynolds Tobacco Company
InventorsErnest G. Farrier, Joseph J. Chiou, Richard L. Lehman, Chandra K. Banerjee
Estimating the term…
Electrochemical heat sources, materials used to make electrochemical heat sources and methods of forming electrochemical heat sources are disclosed. The electrochemical heat sources includes at least two metallic agents capable of interacting electrochemical with one another, such as magnesium and iron or nickel. The metallic agents may be provided in a variety of forms, including a frozen melt, a bimetallic foil, wire of a first metal wrapped around strands of a different metal, and a mechanical alloy. The metallic agents may be in the form of a powder filling a straw, or small particles extruded with a binder or pressed to form a rod. The powder filled straw or rod may be placed in a heat chamber surrounded by tobacco in a smoking article. An electrolyte solution contacts the metallic agents in the heat chamber to initiate the electrochemical interaction, generating heat which in turn may be used to volatilize nicotine and flavor materials in the tobacco. The heat sources may also be used to heat foods or beverages, in hand warmers, and to heat equipment or materials.
An electrochemical heat source comprising a frozen melt comprising magnesium and nickel.
A method of making a frozen melt of magnesium and nickel comprising the steps of heating a mixture of magnesium and nickel to a temperature at which the mixture forms a magnesium-nickel solution and cooling the solution to solidify the frozen melt.
A method of making particles useful in an electrochemical heat source comprising the steps of:
An electrochemical heat source comprising particles of a frozen melt comprising magnesium and nickel.
A method of forming an electrochemical heat source comprising the steps of:
A method of forming an electrochemical heat source comprising the steps of:
A method of forming an electrochemical heat source comprising the steps of:
An electrochemical heat source comprising:
An electrochemical heat source comprising:
Dependencies are inferred from the claim text.