Microalloyed spring
AssigneeDreamwell, Ltd.
InventorsMichael S. DeFranks, William Jud Ready, Jeremy Lynn
Life of this patent
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Abstract
The systems and methods described herein include innerspring assemblies or innerspring cores for use with cushioning articles such as mattresses. The innerspring core may have one or more coil springs formed from a high-carbon steel wire alloyed with one or more suitable alloying elements such as titanium and copper and capable of imparting greater strength and durability to the innerspring core.
Claims20
A coil spring in an innerspring assembly in a cushioning article, comprising
- a high-carbon steel wire coiled into a helical spring and alloyed with an alloying element, wherein the high carbon steel wire includes carbon that is from about 0.50 to about 0.99 weight percent of the spring, wherein the high carbon steel wire has a diameter of 0.04 to 0.11 inches (1.016 to 2.794 millimeters);
- wherein the alloying element comprises titanium, silicon, and copper, the titanium ranging from 0.001 to about 0.1 weight percent of the spring, the silicon ranging from 0.001 to less than 0.55 weight percent of the spring, and the copper ranging from 0.1 to about 0.3 weight percent of the spring, and wherein a total amount of the alloying element is from 0.001 to 2 weight percent of the spring.
A coil spring in an innerspring assembly in a cushioning article, comprising
- a carbon steel wire coiled into a helical spring and alloyed with an alloying element, wherein the high carbon steel wire has a diameter of 0.04 to 0.11 inches (1.016 to 2.794 millimeters);
- wherein the carbon is from about 0.50 to about 0.99 weight percent of the spring and the alloying element comprises titanium, silicon, and copper, the titanium ranging from 0.001 to about 0.01 weight percent of the spring, the silicon ranging from 0.001 to less than 0.55 weight percent of the spring, and the copper ranging from 0.1 to about 0.3 weight percent of the spring, and wherein a total amount of the alloying element is from 0.001 to 2 weight percent of the spring.
A coil spring in an innerspring assembly in a cushioning article, comprising
- a carbon steel wire coiled into a helical spring and alloyed with an alloying element, wherein the high carbon steel wire has a diameter of 0.04 to 0.11 inches (1.016 to 2.794 millimeters);
- wherein the carbon is from about 0.50 to about 0.99 weight percent of the spring and the alloying element comprises titanium, aluminum, and copper, the titanium ranging from 0.001 to about 0.01 weight percent of the spring, the aluminum that is about 0.003 weight percent of the spring, and the copper ranging from 0.1 to about 0.3 weight percent of the spring, and wherein a total amount of the alloying element is from 0.001 to 2 weight percent of the spring.
Dependencies are inferred from the claim text.