L'invention concerne une amélioration aux matelas anti-escarres. Cette amélioration consiste dans le fait qu'une paroi interne (1) permet d'obtenir une grande épaisseur sans qu'au cours du gonflage et du dégonflage il ne se produise de déplacement de l'ensemble. Un autre avantage est de pouvoir utiliser des pressions faibles, ce qui améliore très nettement le confort du malade et l'efficacité.

A damped waterbed mattress includes an envelope or bladder made of vinyl or other flexible, nonporous elastomeric material and which contains a plurality of modular internal "cells" that are in intentionally restricted fluid communication with one another. These cells are themselves partitioned into at least an inner and an outer chamber that are, likewise, in restricted or metered fluid communication with each other. The top of each cell preferably includes a lighter-than-water portion, such as a small sheet of foam, while the bottom of each cell preferably includes a heavier portion, such as a heavier gauge of vinyl. Thus the cells, along with with the chambers contained therein, are filled with water upon the filling of the waterbed proper, and are maintained in their filled and expanded state by virtue of the positive buoyancy of their top surfaces and the more negative buoyancy of their bottom surfaces. The chambers and cells are formed by placing hollow dies whose inner surface and opposing edges are covered by a vinyl band between vinyl sheets, bonding and collapsing one side of the chamber or cell through the hollow cavity of the die.

A damped waterbed mattress includes an envelope or bladder made of vinyl or other flexible, nonporous elastomeric material and which contains a plurality of modular internal "cells" that are in intentionally restricted fluid communication with one another. These cells are themselves partitioned into at least an inner and an outer chamber that are, likewise, in restricted or metered fluid communication with each other. The top of each cell preferably includes a lighter-than-water portion, such as a small sheet of foam, while the bottom of each cell preferably includes a heavier portion, such as a heavier gauge of vinyl. Thus the cells, along with with the chambers contained therein, are filled with water upon the filling of the waterbed proper, and are maintained in their filled and expanded state by virtue of the positive buoyancy of their top surfaces and the more negative buoyancy of their bottom surfaces. The chambers and cells are formed by placing hollow dies whose inner surface and opposing edges are covered by a vinyl band between vinyl sheets, bonding and collapsing one side of the chamber or cell through the hollow cavity of the die.

The air pad according to the present invention can be used in the manufacture of a thermo-keeping and heat insulation material, an air mat, an air bed, a floating cover, etc. since double weave can have air therein which has an excellent thermo-keeping property, and the manufacturing process of the products can be simplified by the present invention.

A tensioning structure (102) for use in inflatable products is provided. The inflatable structure (102) may include a first plastic sheet, a second plastic sheet spaced apart from the first plastic sheet, and an inflatable air chamber defined by the first plastic sheet and the second plastic sheet. A plurality of tensioning structures (100,802) may be disposed within the air chamber. Each tensioning structure (102) may include a panel (202) made of a single sheet of porous material, a first weld sheet affixed to a first end of the panel (202) and affixed to the first plastic sheet, and a second weld sheet affixed to a second end of the panel (202) opposite the first weld sheet and affixed to the second plastic sheet.

A mattress for evenly gathering and dispersing human body gravity comprises elastic surface layer connecting cloth (1), elastic support frames (2), lateral connecting cloth (3), a filling region (4), granular fillers (5), a filler inlet/outlet (6), lower connecting cloth (7), a foot limiting belt (8), a leg limiting belt (9), hip limiting belts (10) and a back limiting belt (11) ("limiting belts" for short). The width of each of the limiting belts (8, 9, 10, 11) is less than that of the filling region. Upper ends and lower ends of the limiting belts (8, 9, 10, 11) are separately connected to an upper cloth layer and a lower cloth layer. When the mattress is stressed by human body gravity, the granular fillers automatically move towards a gravity-free region and fill a gap between the human body and the mattress, so as to provide a larger balanced stress surface for the human body and realize balancing of the human body gravity. The mattress is self-adaptive to a posture of lying on the side or lying on the back, so that no pillow is required. The mattress has functions of improving blood circulation and relieving fatigue of joints and muscles, and can avoid discomfort due to uneven stress. The mattress is partitioned into one or more independent filling regions by lateral upright partitioning cloth (12), so that the mattress can be used by one or more persons.