Patent ID: 6745420
Filing Date: 2004-06-08
Classification: A47C

Abstract:
A mattress with layer combinations, comprising one or more hermetically sealed chambers, a first of said chambers having an airtight outer covering enclosing all other chambers, said first chamber having at least one core of self-inflating polyurethane foam that is density and IFD adjustable located therein, and having at least one core of coil springs located therein, and having at least one valve fitted in a wall of said first chamber serving as a means to evacuate air; and a vacuum communicably connected to each said valve outside of said covering; at least one said valve being opened for allowing air to pass to and from said foam core and at least one said valve being opened for allowing air to pass to and from said coil spring core when said vacuum is deactivated and activated respectively; said vacuum being activated for exhausting air from said foam core in a selected quantity to constrict and partially deflate said foam core and being deactivated for allowing a foam core that is at least partially collapsed to draw air in through said valve and inflate, said valve being selectively closed with said foam core in one of a plurality of fully self-inflated and partially deflated states to maintain a desired air pressure within said foam core, whereby corresponding levels of density and IFD are selectively exhibited within said core, at least one such level in a partially collapsed state providing said foam core with a viscoelastic foam feel; said vacuum being activated for exhausting air from said coil spring core to increase the firmness of said coil spring core, whereby said respective cores may be individually adjusted in a selected manner.