Pneumatic cushion and manufacturing method therefor

Details Pneumatic cushion and manufacturing method therefor Pneumatic cushion and manufacturing method therefor

1982-02-18

1984-08-28

Grosz, Alexander

Beds

Bedclothing

And means to facilitate changing thereof

5441, 156213, 297DIG3, A47C 2708

Patent

active

044674848

ABSTRACT:
A pneumatic cushion fabricated from two sheets of expandable thin material are welded together at a circumferential portion thereof to define therebetween a expandable pneumatic chamber. The welded portion is separated from the pneumatic chamber by a substantially rigid board. The board-like member cooperates with a portion of the sheets mating therewith to isolate the welded portion from tension forces applied to the sheets as the chamber air pressure increases.

REFERENCES:
patent: 2415150 (1947-02-01), Stein
patent: 2488993 (1949-04-01), Teague
patent: 3421163 (1969-01-01), Stoughton
patent: 3568227 (1971-03-01), Dunham

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