Patent ID: 7048263

Claim:
A spring mattress comprising a plurality of interconnected coil springs enclosed in covers, at least two springs that are located adjacent to one another being spaced apart by an interjacent separation distance (SA), said separation distance exceeding approximately 10% of the diameter of the largest one of the spiral turns of the adjacent springs, the covers enclosing adjacent springs being spaced apart by an interjacent separation distance (SB), said separation distance exceeding 15% of the diameter of the largest one of the spiral turns of the adjacent springs, the springs having helically coiled wires with a thickness in the range of between 0.5 and 3.0 mm, the spiral turn of the springs having the largest diameter having a diameter size of 2–10 cm, the density of springs in at least one lengthwise direction, in which separation distances are provided, being less than 15 springs per meter.