Importance

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Abstract

The multi-layer multi-material foam mattresses of the present disclosure and related inventions provide novel combinations of multiple layer, multiple material foam layers or stacks which provide unexpected and improved support characteristics and pressure relief and distribution. By combining multiple layers of visco-elastic or latex foam as the top structure of a mattress supported by underlying layers of a laminated urethane foam core, the conformance properties of visco-elastic or latex foam are achieved along with structural support from the underlying core. The multi-layer multi-material foam mattresses of the present disclosure and related inventions include in the various embodiments two or three layers of a first type of foam such as visco-elastic foam or latex foam, in combination with a multi-layer foam support core of a second type of foam such as urethane foam. The disclosed multi-layer/multi-material foam combinations provide superior comfort and conformance, pressure relief, orthopedic support and dampen motion transfer. The multiple layers of the first type of foam preferably have differing density and mass and/or thickness to provide relative gradation between layers and a aggregate performance of support and conformance to body contours and resulting pressure distribution, i.e., avoidance of pressure concentrations. The multiple layers of the second type of foam preferably have differing density and mass and/or thickness to provide relative gradation between layers and aggregate performance of softness and support for the overlying layers of the first type of foam.

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First Claim