US2009172887A1PendingUtilityA1

Laminated visco-elastic support

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Assignee: LANDVIK DAGPriority: Jun 3, 1994Filed: Mar 19, 2009Published: Jul 9, 2009
Est. expiryJun 3, 2014(expired)· nominal 20-yr term from priority
Inventors:Dag LandvikMichael B. Allaway
B32B 7/022B32B 5/18Y10T428/249992Y10T428/24992Y10T428/249981Y10T428/249991Y10T428/233A47C 27/15B32B 2266/0278Y10T428/24983B32B 2479/00Y10T428/2495Y10T428/249953
67
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Claims

Abstract

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.

Claims

exact text as granted — not AI-modified
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.

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