Importance

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Abstract

A shoe insert to be used for cooling the foot to be manufactured and sold as pairs of left and right shoe inserts. The insert has a number of components forming a sandwich. The insert has the shape of a shoe, and is partly adjustable in size to fit a range of shoe sizes. So, the inserts may be sold in sizes, for example, small, medium, and large, and these sizes may then be fine tuned to fit a sub-range of shoe sizes. The inner volume is separated by a pressure breakable seam approximately at the instep which ruptures when pressure is applied. The seam effectively divides the interior volume into two compartments. One compartment contains a liquid and the other contains a chemical substance. When the seam is ruptured, the liquid flows from one compartment into the other compartment. When the chemical substance combines with the liquid, an endothermic reaction occurs which causes cooling of the foot. The bottom component of the cushioned layer has round dimples into which a dry chemical can be placed. Cooling can be accomplished, for example, by combining ammonium nitrate with water. Adding polyacrylamide into the mix will cause a gel to form in the insert.

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First Claim