Hybrid mattress assemblies
Mattress assemblies that provide increased user comfort and increased airflow. The mattress assemblies generally include a multilayered mattress core including at least one coil spring layer disposed on and in direct contact with a viscoelastic foam layer.
1. An elongated mattress core for a one sided mattress structure, the mattress core comprising:
an upper most foam layer;
at least one coiled spring layer;
an underlying support layer comprising a viscoelastic foam consisting of planar top and bottom surfaces free of channels therein and a sidewall extending from the bottom surface to the top surface, wherein the sidewalls define a thickness of the underlying support layer ranging from ½ inch to 2 inches, wherein the at least one coiled spring layer is in direct contact with the viscoelastic foam; and
a base core foam layer comprising a non-viscoelastic polyurethane foam, wherein the underlying support layer comprising the viscoelastic foam overlays the base core foam layer.
2. The mattress core of claim 1 , wherein the at least one coiled spring layer is of a multi-strand configuration.
3. The mattress core of claim 1 , further comprising a second viscoelastic foam layer disposed on and in direct contact the at least one coiled spring layer.
4. The mattress core of claim 1 , further comprising at least one additional foam layer.
5. The mattress core of claim 1 , wherein the at least one coiled spring layer comprises a plurality of pocketed coil springs.
6. The mattress core of claim 4 , wherein the at least one additional foam layer comprises a latex foam layer.
7. The mattress core of claim 4 , wherein the at least one additional layer comprises a pre-stressed foam layer having a firmness that is different from the firmness of the same foam that was not pre-stressed.
8. The mattress core of claim 4 , wherein the at least one additional layer comprises a polyurethane foam layer.
9. The mattress core of claim 1 , wherein the at least one coiled spring layer comprises open coils.
10. A one sided mattress assembly comprising:
a mattress core comprising at least one coiled spring layer, an underlying support layer comprising a viscoelastic foam consisting of planar top and bottom surfaces free of channels therein and a sidewall extending from the bottom surface to the top surface, wherein the sidewalls define a thickness of the underlying support layer ranging from ½ inch to 2 inches, wherein a bottom surface of the at least one coiled spring layer is in direct contact with the viscoelastic foam, and a base core foam layer comprising a non-viscoelastic polyurethane foam, wherein the underlying support layer comprising the viscoelastic foam overlays the base core foam layer; and
a side rail assembly circumscribing a perimeter of the mattress core, the side rail assembly comprising a layer of a polyurethane foam comprising an open cellular structure, wherein the open cellular structure comprises about 10 to about 40 cells per inch, a hardness of about 35 pounds-force to about 100 pounds-force, and a density of about 1.2 pounds per cubic foot to about 2.0 pounds per cubic foot, wherein the layer is configured to be disposed about a perimeter of the mattress core and is configured to permit the flow of fluid from and to the mattress core through the layer.
11. The mattress assembly of claim 10 , wherein the viscoelastic foam is a viscoelastic polyurethane foam.
12. The mattress assembly of claim 10 further comprising one or more addition layers on the mattress core, wherein the one or more additional layers comprise non-viscoelastic foam, visco elastic foam, pre-stressed foam, gel-infused foam, spring coils, polyurethane foam, encased spring coils, latex, or a combination thereof.
13. The mattress assembly of claim 10 , wherein the open cellular structure of the polyurethane foam layer in the side rail assembly comprises a percentage of intact windows between adjacent cells that is less than about 50 percent.
14. The mattress assembly of claim 10 , wherein the side rail assembly comprises multiple layers.
15. The mattress assembly of claim 10 , wherein the at least one coiled spring layer is of a multi-strand configuration.
16. The mattress assembly of claim 10 , wherein the mattress core further comprises a second viscoelastic foam layer disposed on and in direct contact the coiled spring layer.
17. The mattress assembly of claim 10 , wherein the at least one coiled spring layer of the mattress core comprises a plurality of pocketed coil springs.
18. The mattress assembly of claim 10 , wherein the at least one coiled spring layer comprises open coils.
19. The mattress assembly of claim 10 , wherein the at least one coiled spring layer comprises 3.5 inch coils.