Fire blanket
AssigneeWalter Kidde Portable Equipment, Inc.
InventorAdam Chattaway
Life of this patent
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Abstract
A fire blanket comprising a generally flexible substrate and a chemical compound which reacts endothermically when heated. The chemical compound is preferably an alkali metal salt and more preferably a potassium or sodium salt. The compound may be a solid at room temperature s or forms an alkali solution.
Claims13
A fire blanket, comprising a flexible substrate with a chemical compound which reacts endothermically when heated, the substrate being configured to be porous to the chemical compound to allow the chemical compound to permeate therethrough towards and onto a source of heat when the chemical compound is melted or carried in suspension by a carrier solution, the substrate having a cellular construction and wherein the chemical compound is held in the cells.
A fire blanket according to any preceding claim, wherein the chemical compound has a pH greater than 8 and preferably greater than 9.
A fire blanket according to any preceding claim, wherein the chemical compound releases water when heated.
A fire blanket according to any preceding claim, wherein the chemical compound is an aqueous solution of an alkali metal salt.
A fire blanket according to any preceding claim, wherein the chemical compound has a melting point greater than 30° C. and less than 50° C.
A fire blanket according to any preceding claim, wherein the chemical compound is a salt of potassium or sodium.
A fire blanket according to any preceding claim, wherein the chemical compound is impregnated into the substrate.
A fire blanket according to any preceding claim, wherein the chemical compound is formed as a separate layer on the substrate.
A fire blanket according to any preceding claim, wherein the chemical compound is sodium acetate trihydrate or potassium acetate or potassium citrate.
A method of extinguishing a fat fire burning in a container, comprising the steps of forming a fire blanket comprising a flexible substrate of cellular construction and which is porous to a chemical compound when that compound is melted or carried in suspension by a carrier solution, applying a chemical compound to the substrate and holding it in the cells thereof, the chemical compound reacting endothermically when heated so that that chemical compound can permeate in use towards and onto a source of heat and laying the fire blanket over the container.
Dependencies are inferred from the claim text.