Laminated visco-elastic support
View Patent ↗A laminated support for pressure-relief comprising multiple foam layers. The combinations of layers can comprise one or more layers of visco-elastic foam, highly resilient polyurethane foam, reticulated filter polyurethane foam, and the like.
1. A bed mattress for support of a user, the bed mattress comprising:
a substantially planar first foam layer having a first surface and a second surface and having length and width dimensions sufficient to support a reclining body of an adult user, the first foam layer being made of a first viscoelastic foam;
a substantially planar second foam layer having a third surface and a fourth surface, the third surface positioned directly adjacent to the second surface of the first foam layer, the second foam layer being made of a second viscoelastic foam having different properties than the first viscoelastic foam;
a substantially planar third foam layer positioned directly adjacent to the fourth surface of the second foam layer, the third foam layer being made of reticulated filter polyurethane foam; and
a cover positioned directly adjacent to at least one of the first layer and the third layer,
the layers of the bed mattress collectively defining a structure for support of the user in a lying position upon the bed mattress.
2. The bed mattress as claimed in claim 1 , wherein the first viscoelastic foam has a first density, the second viscoelastic foam has a second density, and the reticulated filter polyurethane foam has a third density, wherein the third density is less than the first density and less than the second density.
3. The bed mattress as claimed in claim 1 , further comprising a fourth foam layer coupled to the first surface of the first foam layer, the fourth foam layer comprising reticulated foam.
4. The bed mattress as claimed in claim 3 , wherein the reticulated foam comprises reticulated filter polyurethane foam.
5. The bed mattress as claimed in claim 3 , wherein the fourth layer is adhered to the first surface of the first layer.
6. The bed mattress as claimed in claim 1 , wherein a thickness of the third foam layer is less than a thickness of the first foam layer and the second foam layer combined.
7. The bed mattress as claimed in claim 1 , wherein the third layer is coupled to the fourth surface of the second layer.
8. The bed mattress as claimed in claim 7 , wherein the third layer is adhered to the fourth surface of the second layer.
9. A bed mattress for support of a user, the bed mattress comprising:
a first foam layer having a first surface and a second surface and having length and width dimensions sufficient to support a reclining body of an adult user, the first foam layer being made of a first viscoelastic foam;
a second foam layer having a third surface and a fourth surface, the third surface positioned directly adjacent to and coupled to the second surface of the first foam layer, the second foam layer being made of a second viscoelastic foam having different properties than the first viscoelastic foam;
a third foam layer positioned directly adjacent to and coupled to the fourth surface of the second foam layer, the third foam layer being made of reticulated filter polyurethane foam; and
a cover positioned directly adjacent to at least one of the first layer and the third layer,
the layers of the bed mattress collectively defining a structure for support of the user in a lying position upon the bed mattress.
10. The bed mattress as claimed in claim 9 , wherein the first viscoelastic foam has a first density, the second viscoelastic foam has a second density, and the reticulated filter polyurethane foam has a third density, wherein the third density is less than the first density and less than the second density.
11. The bed mattress as claimed in claim 9 , further comprising a fourth foam layer coupled to the first surface of the first foam layer, the fourth foam layer comprising reticulated foam.
12. The bed mattress as claimed in claim 11 , wherein the fourth layer is adhered to the first surface of the first layer.
13. The bed mattress as claimed in claim 11 , wherein the reticulated foam comprises reticulated filter polyurethane foam.
14. The bed mattress as claimed in claim 9 , wherein a thickness of the third foam layer is less than a thickness of the first foam layer and the second foam layer combined.
15. A bed mattress for support of a user, the bed mattress comprising:
a substantially planar first foam layer having a first surface and a second surface and having length and width dimensions sufficient to support a reclining body of an adult user, the first foam layer being made of a first viscoelastic foam;
a substantially planar second foam layer having a third surface and a fourth surface, the third surface directly adhered to the second surface of the first foam layer, the second foam layer being made of a second viscoelastic foam having different properties than the first viscoelastic foam;
a substantially planar third foam layer directly adhered to the fourth surface of the second foam layer, the third foam layer being made of reticulated filter polyurethane foam; and
a cover positioned directly adjacent to at least one of the first layer and the third layer,
the layers of the bed mattress collectively defining a structure for support of the user in a lying position upon the bed mattress.
16. The bed mattress as claimed in claim 15 , wherein the first viscoelastic foam has a first density, the second viscoelastic foam has a second density, and the reticulated filter polyurethane foam has a third density, wherein the third density is less than the first density and less than the second density.
17. The bed mattress as claimed in claim 15 , further comprising a fourth foam layer adhered to the first surface of the first foam layer, the fourth foam layer comprising reticulated foam.
18. The bed mattress as claimed in claim 17 , wherein the reticulated foam comprises reticulated filter polyurethane foam.
19. The bed mattress as claimed in claim 15 , wherein a thickness of the third foam layer is less than a thickness of the first foam layer and the second foam layer combined.