Patent ID: 9332857
Filing Date: 2016-05-10
CPC Classification: A47C,B68G

Claim Text:
1. A mattress assembly comprising: a first layer of viscoelastic foam defining an upper surface; a second layer of non-viscoelastic foam supporting the first layer; and a plurality of spring elements positioned beneath the upper surface for enhancing a firmness of the combined first and second layers, each of the spring elements including a first spring having a first spring rate and a second spring beneath the first spring and having a second spring rate greater than the first spring rate and a third spring beneath the second spring and having a third spring rate greater than both the first and second spring rates, wherein the first spring is supported upon the second spring and the second spring is supported upon the third spring, the spring elements being positioned in series within discrete cavities within the second layer of non-viscoelastic foam.