Abstract: A pressure relieving pad with graduated pillars to effectively reduce the development of decubitus ulcers. The pad is preferably made of foam to keep the manufacturing costs down and includes a first plurality of large pillars or columns. A second plurality of smaller pillars or columns is then positioned atop each of the larger pillars forming a progression or graduation of pillars. Adjacent larger pillars are preferably attached to one another at their bases to form an underlying, support platform or level for the pad. In operation, the weight or force of the patient using the pad is progressively transferred from the small pillars on top downwardly through the larger pillars to the underlying support platform or level.

Abstract: A vehicle seat structure includes a seat cushion provided such that a spring constant of the seat cushion is set to be lowest at a central portion of a vehicle occupant at a hip point position of the vehicle occupant and become greater from the central portion of the vehicle occupant at the hip point position of the vehicle occupant toward vehicle transverse direction peripheries of the seat cushion.

Abstract: An elongated mattress core for a mattress structure includes a foam core having an upwardly-facing top surface, a bottom surface spaced apart from the top surface, and first and second elongated sides connecting the top and bottom surfaces. The foam core is formed to include a plurality of longitudinally spaced apart transverse slits extending downwardly from the top surface. Each slit terminates at a lower end spaced apart from the bottom surface by a first distance and extending transversely from a first slit end spaced apart from the first side of the foam core to a second slit end spaced apart from the second side of the foam core. Each adjacent pair of slits defines a foam column so that the foam core has a plurality of longitudinally spaced apart and transversely extending foam columns. Each foam column has a pair of generally vertical column side walls defining the slits.