Pressure equalizing support structure

Details Pressure equalizing support structure Pressure equalizing support structure

1990-10-01

1992-01-14

Smith, Gary L.

Beds

Bedclothing

And means to facilitate changing thereof

5449, 428 71, 206584, 297DIG1, A47C 2708

Patent

active

050797875

ABSTRACT:
A support structure is provided which effects a pressure equalization. It mprises an enclosure filled with a large number of loose pieces. In a special embodiment the loose pieces are surrounded by a low friction material, such as nylon fabric, and are made of a deformable material, preferably foam-material. Another embodiment provides balloon-shaped pieces. Further an outer cover surrounding the enclosure may be provided.

REFERENCES:
patent: 2865800 (1958-12-01), Stastny
patent: 3480280 (1969-11-01), Gamertsfelder
patent: 3616158 (1971-10-01), Robens
patent: 4027888 (1977-06-01), Wilcox
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patent: 4109332 (1978-08-01), Luck
patent: 4304824 (1981-12-01), Karpinski
patent: 4432110 (1984-02-01), Sutton
patent: 4606087 (1986-08-01), Alivizatos
patent: 4667356 (1987-05-01), Holmquist
patent: 4862539 (1989-09-01), Bokich
patent: 4924541 (1990-05-01), Inagaki

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