Patent ID: 7908693
Filing Date: 2011-03-22
Classification: A47C

Abstract:
1. A mattress innerspring comprising: a plurality of coil-in-coil springs, each coil-in-coil spring having an outside helical coil and an inside helical coil made of a continuous wire; the outside helical coil having an upper end convolution and a lower end convolution opposite the upper end convolution, an uncompressed height of approximately 8.25 inches and having a total of 5 helical convolutions; the inside helical coil having an upper end convolution and a lower end convolution opposite the upper end convolution, the lower end convolution of the inside helical coil being continuous with the lower end convolution of the outside helical coil, the inside helical coil having an uncompressed height of approximately 5.75 inches and having a total of approximately 7 helical convolutions; wherein the diameter of the upper end convolution of the outside helical coil is less than the diameter of the previous convolutions of the outside helical coil and the diameter of the lower end convolution of the inside helical coil is greater than the subsequent convolutions of the inside helical coil; wherein the wire gauge of the coil-in-coil springs is approximately between 13 and 16 and each coil-in-coil spring is double-annealed, individually pocketed and arranged in a matrix in the mattress innerspring; and wherein the outside helical coil extends in a counter-clockwise direction and the inside helical coil extends in a clockwise direction.