Mattress

Details Mattress Mattress

1982-04-01

1985-02-12

Cohen, Lee S.

Surgery

Truss

Pad

5448, 5468, A61N 140, A47C 2716

Patent

active

044984774

ABSTRACT:
A mattress comprises an upper layer having a number of projections formed integrally on the top surface thereof and a lower layer, the upper and lower layers being formed of foamed plastic capable of being deformed by compressive load and restored. A hygroscopic layer formed of a highly hygroscopic material such as cotton is disposed under the upper layer to absorb water from the upper layer. Between the hygroscopic layer and the lower layer lies a middle layer which has a number of columnar core members arranged parallel to and coupled with one another. The core members are formed from relatively hard foamed plastic. An outer covering covers the upper, hygroscopic, middle, and lower layers. Upper and lower spaces are defined between the middle and hygroscopic layers and between the middle and lower layers, respectively, and communicate each other. The water absorbed by the hygroscopic layer is discharged into the upper and lower spaces, where it is discharged into the open air through the outer covering.

REFERENCES:
patent: 2728089 (1955-12-01), Hynes
patent: 4047254 (1977-09-01), Homasu
patent: 4229847 (1980-10-01), Degen
patent: 4407031 (1983-10-01), Michaels

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