LAMINATED VISCO-ELASTIC SUPPORT
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 layered bed mattress for pressure-relief of a user, the bed mattress comprising:
a first foam layer having a generally planar first support surface adapted to substantially face the user resting upon the bed mattress and having length and width dimensions sufficient to support a reclining body of a person, and a generally planar second surface opposite the first support surface, the first and second surfaces defining therebetween a substantially uniform undeflected thickness, the first foam layer comprising visco-elastic foam; and
a second foam layer having a generally planar third surface adjacent and substantially facing the second surface of the first foam layer, the second foam layer having a substantially uniform undeflected thickness greater than that of the first foam layer.
2 . The layered bed mattress as claimed in claim 1 , wherein the visco-elastic foam of the first foam layer is responsive to body heat from the user.
3 . The layered bed mattress as claimed in claim 1 , wherein the first foam layer is adhered to the second foam layer.
4 . The layered bed mattress as claimed in claim 2 , wherein the first foam layer is adhered to the second foam layer.
5 . The layered bed mattress as claimed in claim 1 , wherein the second foam layer has a hardness greater than that of the first foam layer.
6 . The layered bed mattress as claimed in claim 2 , wherein the second foam layer has a hardness greater than that of the first foam layer.
7 . The layered bed mattress as claimed in claim 3 , wherein the second foam layer has a hardness greater than that of the first foam layer.
8 . The layered bed mattress as claimed in claim 4 , wherein the second foam layer has a hardness greater than that of the first foam layer.
9 . The layered bed mattress as claimed in claim 1 , wherein the second foam layer comprises visco-elastic foam.
10 . The layered bed mattress as claimed in claim 2 , wherein the second foam layer comprises visco-elastic foam.
11 . The layered bed mattress as claimed in claim 3 , wherein the second foam layer comprises visco-elastic foam.
12 . A layered bed mattress for pressure-relief of a user, the bed mattress comprising:
a first foam layer having a generally planar first support surface adapted to substantially face the user resting upon the bed mattress and having length and width dimensions sufficient to support a reclining body of a person, and a generally planar second surface opposite the first support surface, the first and second surfaces defining therebetween a substantially uniform undeflected thickness, the first foam layer comprising visco-elastic foam; and
a second foam layer having a generally planar third surface adjacent and substantially facing the second surface of the first foam layer, the second foam layer comprising visco-elastic foam.
13 . The layered bed mattress as claimed in claim 12 , wherein the visco-elastic foam of the first foam layer is responsive to body heat from the user.
14 . The layered bed mattress as claimed in claim 12 , wherein the first foam layer is adhered to the second foam layer.
15 . The layered bed mattress as claimed in claim 13 , wherein the first foam layer is adhered to the second foam layer.
16 . The layered bed mattress as claimed in claim 12 , wherein the second foam layer has a hardness greater than that of the first foam layer.
17 . The layered bed mattress as claimed in claim 13 , wherein the second foam layer has a hardness greater than that of the first foam layer.
18 . The layered bed mattress as claimed in claim 14 , wherein the second foam layer has a hardness greater than that of the first foam layer.
19 . The layered bed mattress as claimed in claim 15 , wherein the second foam layer has a hardness greater than that of the first foam layer.
20 . A layered bed mattress for pressure-relief of a user, the bed mattress comprising:
a first foam layer having a generally planar first support surface adapted to substantially face the user resting upon the bed mattress and having length and width dimensions sufficient to support a reclining body of a person, and a generally planar second surface opposite the first support surface, the first and second surfaces defining therebetween a substantially uniform undeflected thickness, the first foam layer comprising visco-elastic foam; and
a second foam layer having a generally planar third surface adjacent and substantially facing the second surface of the first foam layer, the second foam layer having a density less than that of the first foam layer and a hardness greater than that of the first foam layer.
21 . The layered bed mattress as claimed in claim 20 , wherein the second foam layer is thicker than the first foam layer.
22 . The layered bed mattress as claimed in claim 20 , wherein the visco-elastic foam of the first foam layer is responsive to body heat from the user.
23 . The layered bed mattress as claimed in claim 21 , wherein the visco-elastic foam of the first foam layer is responsive to body heat from the user.
24 . The layered bed mattress as claimed in claim 20 , wherein the first foam layer is adhered to the second foam layer.
25 . The layered bed mattress as claimed in claim 21 , wherein the first foam layer is adhered to the second foam layer.
26 . The layered bed mattress as claimed in claim 20 , wherein the second foam layer comprises visco-elastic foam.
27 . The layered bed mattress as claimed in claim 21 , wherein the second foam layer comprises visco-elastic foam.