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US 6,099,555 AGranted
Gelling cold pack
AssigneeTempra Technology, Inc.
InventorMartin W. Sabin
Life of this patent
Estimating the term…
Abstract
The present invention provides a cold pack which utilizes the negative heat of solution of a material dissolving in a liquid. The cold pack further includes a gelling agent, which is activatable to form a gel. The gel provides a number of benefits, including better distribution of cold, increased cold persistence in the cold pack, and a more complete utilization of the ingredients of the cold pack than possible with prior art devices.
Claims17
A gelling cold pack comprising:
- a disposable container, wherein the container comprises:
- at least one liquid-impermeable, heat-conducting first zone containing a composite particulate first material capable of interacting with a liquid second material to produce cold, to which particles of a gelling agent are adhered as a permeable, non-continuous coating;
- at least one liquid-impermeable, heat-conducting second zone containing said second material with which said first material in said first zone can interact to produce cold;
- a separator disposed between said first and second zones, the separator being manually operable to provide communication between said zones,
- wherein communication between the zones initiates gelation of the gelling agent to produce a gel in the container, and wherein said communication initiates the interaction of said first and said second materials, resulting in the generation of cold within the container.
2 more elements
A gelling cold pack comprising:
- a disposable polymeric container, wherein the container comprises:
- at least one liquid-impermeable, heat-conducting first zone containing starch adhered to low-density ammonium nitrate;
- at least one liquid-impermeable, heat-conducting second zone containing water;
- a single-use frangible membrane disposed between said first and second zones, the separator being operable to provide communication between said zones,
- wherein communication between the zones initiates gelation of the starch within the container to produce a starch gel in the container, and initiates the interaction of the ammonium nitrate and water, resulting in the generation of cold within the container.
2 more elements
Dependencies are inferred from the claim text.