초록

A mattress configured to support a patient including a foot section having a leg portion, a heel pressure relief portion, and a raised calf support portion positioned intermediate the leg portion and the heel pressure relief portion.

대표청구항 ▼

The invention claimed is: 1. A mattress configured to support a patient, the mattress comprising: a head section; a foot section; a seat section positioned intermediate the head section and the foot section, the head section, the foot section, and the seat section cooperating to define a patient su

The invention claimed is: 1. A mattress configured to support a patient, the mattress comprising: a head section; a foot section; a seat section positioned intermediate the head section and the foot section, the head section, the foot section, and the seat section cooperating to define a patient support surface, the foot section including a leg portion, a heel pressure relief portion, and a raised calf support portion positioned intermediate the leg portion and the heel pressure relief portion; a plurality of support bladders extending longitudinally from the head section to the foot section; and an upper foam layer positioned above the support bladders, the upper foam layer including longitudinally extending, downwardly facing arcuate recesses configured to receive an upper portion of the support bladders; wherein the arcuate recesses do not extend within the calf support portion, such that the upper foam layer is positioned vertically higher within the calf support portion than in the seat section. 2. A mattress configured to support a patient, the mattress comprising: a plurality of longitudinally extending support bladders; an upper foam layer supported above the support bladders and including: a heel pressure relief portion, a first portion, a second portion having a substantially planar lower surface, the second portion being positioned proximate the first portion, an upper surface defined by the first portion and the second portion, the first portion defining a leg portion, the second portion defining a raised calf support portion positioned intermediate the leg portion and the heel pressure relief portion, the upper surface within the second portion including an apex, and a plurality of longitudinally extending, downwardly facing arcuate recesses extending within the first portion and configured to receive an upper portion of the support bladders, the upper surface lowering relative to the support bladders as the upper surface extends from the apex in a direction from the second portion to the first portion; and a lower foam layer positioned below the upper foam layer, the lower foam layer having a stiffness greater than a stiffness of at least a portion of the upper foam layer. 3. A mattress comprising: an upper foam layer including a heel pressure relief portion, a first portion, a second portion positioned proximate the first portion, an upper surface defined by the first portion and the second portion, the first portion defining a leg portion, and the second portion defining a raised calf support portion positioned intermediate the leg portion and the heel pressure relief portion, the upper surface within the second portion including an apex, a plurality of longitudinally extending support bladders positioned below the upper foam layer, a plurality of longitudinally extending, downwardly facing arcuate recesses extending within the first portion and configured to receive an upper portion of the support bladders, the upper surface lowering relative to the support bladders as the upper surface extends from the apex in a direction from the second portion to the first portion; a lower foam layer positioned below the support bladders and configured to direct forces applied to the upper surface to a deck assembly supporting the mattress; and wherein a stiffness of the lower foam layer is greater than a stiffness of at least a portion of the upper foam layer. 4. The mattress of claim 3, wherein the upper foam layer further includes: a head section; and a seat section; wherein the leg portion, the raised calf support portion, and the heel pressure relief portion cooperate to define a foot section, the seat section being positioned intermediate the head section and the foot section. 5. The mattress of claim 3, wherein the foam layer in the first portion has a first stiffness, and the foam layer in the second portion has a second stiffness, the first stiffness being less than the second stiffness. 6. The mattress of claim 3, further comprising at least one accumulator bladder in fluid communication with the support bladders and configured to maintain a constant internal pressure in the support bladders by adjusting fluid supplied to the support bladders in response to changing force applied to the upper surface. 7. The mattress of claim 3, further comprising a plurality of magnets supported below the lower foam layer. 8. The mattress of claim 7, further comprising an outer cover enclosing the upper foam layer, the support bladders, and the lower foam layer, the outer cover including a pocket configured to receive the plurality of magnets.