Tension relieving body support apparatus
AssigneeKemper Support Surfaces, Inc.
InventorsChristopher E. Kemper, Kristi Sonsteby Kemper
Life of this patent
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Abstract
A mattress including a core foam layer having a first indentation force deflection at twenty five percent compression, a first density and a first thickness. The top outer foam layer has a second indentation force deflection at twenty five percent compression, a second density and a second thickness. The first intermediate foam layer is intermediate and coextensive with the core layer and the top outer layer, and has a third indentation force deflection at twenty five percent compression, a third density and a third intermediate thickness. The first indentation force deflection is greater than the third indentation force deflection and the third indentation force deflection is greater than the second indentation force deflection.
Claims20
A mattress comprising:
- a core foam layer having a first indentation force deflection at twenty five percent compression, a first density and a first thickness;
- a top outer foam layer having a second indentation force deflection at twenty five percent compression, second density and a second thickness;
- a first intermediate foam layer intermediate and coextensive with the core layer and the top outer layer and bonded to the core layer and the top outer layer;
- and having a third indentation force deflection at twenty five percent compression, a third density and a third intermediate thickness;
- wherein the first indentation force deflection is greater than the third indentation force deflection and the third indentation force deflection is greater than the second indentation force deflection;
- and
- wherein the relationship of first indentation force deflection, second indentation force deflection and third indentation force deflection is defined by the relationships:
- A=(C/5.3)plus or minus 5
- B=2(C/5.3)plus or minus 5
- wherein A represents the second indentation force deflection, B represents the third indentation force deflection and C represents the first indentation force deflection.
A method of making a mattress comprising:
- bonding a core foam layer having a first indentation force deflection at twenty five percent compression, a first density and a first thickness to a first intermediate foam layer that is substantially coextensive with the core layer;
- bonding a top outer foam layer to the first intermediate foam layer;
- selecting the top outer foam layer to have a second indentation force deflection at twenty five percent compression, second density and a second thickness;
- selecting the intermediate layer to have a third indentation force deflection at twenty five percent compression, a third density and a third intermediate thickness;
- wherein the first indentation force deflection is greater than the third indentation force deflection and the third indentation force deflection is greater than the second indentation force deflection;
- and
- selecting the relationship of first indentation force deflection, second indentation force deflection and third indentation force deflection to be defined by the relationships
- A=(C/5.3)plus or minus 5
- B =2(C/5.3)plus or minus 5
- wherein A represents the second indentation force deflection, B represents the third indentation force deflection and C represents the first indentation force deflection.
Dependencies are inferred from the claim text.