Patent ID: 8147000

Claim:
A cushion for enhancing support of a person resting upon an underlying sitting support structure, the cushion comprising in combination: a seat portion; said seat portion having at least one air filled chamber between a top wall and a bottom wall; a back portion; said back portion having at least two air filled chambers between a front wall and a back wall, including a first chamber defined by a sacral/lumbar/kidney space above a second chamber defined by a sacral/hip space and at least partially positioned and configured to allow air to flow between said sacral/lumbar/kidney space and said sacral/hip space; said back portion joined to said seat portion at a rear side of said seat portion and a lower end of said back portion; means to fill and control level of fill within said back portion; wherein said back portion includes a plurality of additional chambers above said sacral/lumbar/kidney space, said additional chambers in said back portion at least partially open to said sacral/lumbar/kidney space; and wherein said chambers in said back portion above said sacral/lumbar/kidney space include both long lateral chambers and short central chambers, with said short central chambers between multiple said long lateral chambers.