Inflatable cushion
First Claim
1. An inflatable cushion comprising a plurality of fluid filled layers formed of sheets of flexible material, each layer comprising a plurality of chambers arranged in adjacent side-by-side relationship to each other, said chambers of a layer disposed in vertically stacked and abutted relationship to said chambers of an other layer defining a cell, at least one cell including an orifice disposed directly between at least one pair of said vertically stacked chambers to provide predetermined volumetric flow rate for controlled interlayer fluid communication when said cells are subjected to a compressive load.
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Accused Products
Abstract
An inflatable multi-layer body support cushion, adapted to buffer or dampen the fluid reaction to forces applied to the upper surface of the cushion, includes a plurality of adjacent cells of generally hourglass configuration defined by vertically stacked upper and lower chamber portions and medial neck portion. The laterally adjacent chambers are interconnected for the intralayer fluid flow therebetween. The vertically adjacent chambers are interconnected in the neck portion of the cells by orifices which control the interlayer fluid communication between the upper and lower chambers.
170 Citations
16 Claims
- 1. An inflatable cushion comprising a plurality of fluid filled layers formed of sheets of flexible material, each layer comprising a plurality of chambers arranged in adjacent side-by-side relationship to each other, said chambers of a layer disposed in vertically stacked and abutted relationship to said chambers of an other layer defining a cell, at least one cell including an orifice disposed directly between at least one pair of said vertically stacked chambers to provide predetermined volumetric flow rate for controlled interlayer fluid communication when said cells are subjected to a compressive load.
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11. An inflatable cushion comprising a plurality of fluid filled cells formed of sheets of flexible material, each of said cells including a plurality of chambers disposed in vertically stacked and abutted relationship to each other, said cells arranged in adjacent side-by-side relationship to each other to form a plurality of inflatable layers defined by each of said vertically stacked chambers of said cells, at least one cell including an orifice disposed directly between at least one pair of said vertically stacked chambers, at least some of said adjacent chambers in at least one of said layers are interconnected by conduits which provide intralayer fluid communication therebetween.
Specification