Patent ID: 8863336

Claim:
A mattress assembly comprising: a rigid frame and an upper mattress portion; an array of air springs, each in communication with a supply of air, for selectively varying the air pressure within said spring, so as to provide a resilient body against which a user may recline, wherein each air spring includes (i) an outer cylindrical surface formed with accordion folds that substantially restricts the air spring from outward radial expansion when subject to increased internal pressure and (ii) an aperture in an upper surface of each air spring, providing access to a cavity within said spring, said cavity open to ambient pressure and sealed from the air supply; a foam layer having a plurality of through cut-outs in registration with said air springs; wherein the array of air spring are disposed within said frame with said foam layer being placed on top of said array with each air spring occupying a corresponding through cut-out; wherein each air spring has a top surface surrounding the aperture, upon inflation the top surface forms a frusto-toroidal shaped contact area for exerting upward pressure on said upper mattress portion; and a foam bullet disposed within the aperture of said air spring, wherein the foam layer comprises a first fixed density component, with said air spring comprising a variable density component, and said foam bullet comprising a second fixed density component; wherein said first, second and third density components all reside within the same plane.