Patent ID: 7296310

Claim:
A foundation for a mattress, the foundation comprising: (a) a lower frame having a top, a bottom, a perimeter, and one or more lower frame members disposed around at least a portion of the perimeter of the lower frame, (b) an upper frame having a top, a bottom, a perimeter, and one or more upper frame members disposed around at least a portion of the perimeter of the upper frame, and (c) a plurality of movable supports attached to one or more of the lower frame member and the upper frame member, the movable supports being adapted to maintain the upper frame and the lower frame in a spaced apart relation and being further adapted to permit vertical movement of the upper frame into a plurality of spaced apart relations relative to the lower frame, wherein (i) the movable supports comprise a support member and a receiving member, (ii) the support member is substantially rectangular in shape and has a length, a width, and a height, and the length, width, and height of the support member are unequal, wherein the spaced apart relation of the upper frame and lower frame can be adjusted between one of three predetermined heights based on the orientation of the support member within the foundation, and (iii) the receiving member is attached to one of the lower frame member and the upper frame member and is adapted to receive the support member and restrict lateral movement of the support member relative to the upper frame and the lower frame, and wherein each surface of the support member comprises a plurality of keys or recesses.