Trigger to activate supercooled aqueous salt solution for use in a heat pack
AssigneeOmni Therm, Inc.
InventorDale E. Walters
Life of this patent
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Abstract
A trigger to initiate crystallization of a supercooled aqueous salt solution of a heat pack, thereby liberating heat. The trigger, when activated, pierces the container, allowing air to enter the pack and initiate crystallization of the solution. A seal over the trigger prevents the solution from leaking from the heat pack.
Claims12
A trigger to initiate crystallization of a supercooled aqueous salt solution encased in a flexible container, comprising a puncturing means and an adhesive sealing means,
- wherein the puncturing means is attached by a sealing means to the exterior of the flexible container,
- wherein the trigger, when activated, punctures the flexible container, and admits air thereby initiating crystallization, and
- wherein the sealing means prevents any leakage of the solution from the container.
A trigger to initiate crystallization of a supercooled aqueous salt solution encased in a flexible container, comprising a puncturing means and a sealing means,
- wherein the puncturing means is attached by a sealing means to the exterior of the flexible container,
- wherein the trigger, when activated, puncture the flexible container, and admits air thereby initiating crystallization,
- wherein the sealing means prevents nay leakage of the solution from the container,
- wherein the salt of the supercooled aqueous salt solution is selected from the group consisting of sodium acetate, lead acetate, calcium nitrate tetrahydrate, sodium pyrophosphate and sodium thiosulfate,
- wherein the flexible container is composed of materials selected from the group consisting of rubber, vinyl, vinylcoated fabric, nylon polylaminate and polyethylene,
- wherein the puncturing means comprises a base plate with a plurality of piercing members, and
- wherein the sealing means is a contact adhesive seal having a diameter greater than that of the base plate.
A trigger to initiate crystallization of a supercooled aqueous salt solution encased in a flexible container, comprising a puncturing means and an adhesive sealing means,
- wherein the puncturing means is attached by a sealing means to the exterior of the flexible container,
- wherein the puncturing means comprises a base plate carrying a plurality of piercing means,
- wherein the trigger, when activated, punctures the flexible container, and admits air thereby initiating crystallization, and
- wherein the sealing means prevents any leakage of the solution from the container.
Dependencies are inferred from the claim text.