Patent ID: 7234183

Claim:
A fluid pressurizable multiple chamber mattress wherein each chamber is capable of operably receiving and releasing a fluid, comprising: a first fluid impermeable dielectrically weldable non-crystallizing hydrocarbon covering sheet having an inner surface and an outer surface; at least two fabric layers wherein at least one layer is positioned upon the inner surface of the first covering sheet, the fabric layers having an outer surface and an inner surface, the inner surfaces of the fabric layers being linked via a plurality of threads, the outer surfaces of the fabric layers carrying an fluid impermeable dielectrically weldable non-crystallizing hydrocarbon coating, wherein at least one coated outer fabric surface is in contact with the inner surface of the first covering sheet; a second fluid impermeable dielectrically weldable non-crystallizing hydrocarbon covering sheet having an inner surface and an outer surface, the second covering sheet positioned onto the first covering sheet and the fabric layers, wherein at least one coated outer fabric surface is in contact with the inner surface of the second covering sheet, wherein the inner surfaces of the first and second covering sheets contact beyond a perimeter of the fabric layers; a first dielectric weld, welding the inner surfaces of the first and second covering sheets to the outer surfaces of the fabric layers forming a first and a second fluid impermeable fluid pressurizable chamber defined between the outer surfaces of the fabric layers and the inner surfaces of the first and second covering sheets; a second dielectric weld, welding the inner surfaces of the first and second covering sheets forming a third fluid impermeable fluid pressurizable chamber defined between the inner surfaces of the first and second covering sheets and the inner surfaces of the fabric layers; and at least one fluid valve carried by at least one covering sheet for permitting the pressurization and depressurization of at least one fluid pressurizable chamber.