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US 7,908,693 B2Granted
Coil-in coil springs and innersprings
AssigneeSealy Technology, LLC
InventorLarry K. DeMoss
Life of this patent
Estimating the term…
Abstract
A mattress innerspring having coil-in-coil springs arranged in an array. Each coil-in-coil spring an outside helical coil and an inside helical coil, wherein the outside helical coil has a greater height and diameter than the inside helical coil, each coil having a dual spring rate between that of the outside helical coil and the combined spring rates of the outside and inside helical coils. The coil-in-coil springs may be pocketed or unpocketed in a mattress innerspring.
Claims19
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.
4 more elements
A mattress innerspring comprising:
- a plurality of interconnected coil-in-coil springs, each coil-in-coil spring having an outside helical coil and an inside helical coil which is connected to the outside helical coil;
- 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 4 or more helical convolutions;
- the inside helical coil having an upper end convolution and a lower end convolution opposite the upper end convolution, an uncompressed height of approximately 5.75 inches and 6 or more helical convolutions;
- wherein a diameter of the upper end convolution of the outside helical coil is approximately 64 mm and a diameter of the previous convolutions of the outside helical coil is approximately 70 mm;
- wherein a diameter of the lower end convolution of the inside helical coil is approximately 40.8 mm and a diameter of other convolutions of the inside helical coil is approximately 32.8 mm;
- wherein a wire gauge of the coils is in an approximate range of between 14 and 15.5 and each coil is double-annealed, arranged in a matrix and laced together with helical lacing wire;
- and
- wherein the outside helical coil extends in a counter-clockwise direction and the inside helical coil extends in a clockwise direction.
5 more elements
A mattress innerspring comprising:
- a plurality of coil-in-coil springs, each coil-in-coil spring contained in a pocket and arranged in a matrix, each coil-in-coil spring having an outside helical coil with helical turns in a counter-clockwise direction, and an inside helical coil with helical turns in a clockwise direction;
- the outside helical coil having an uncompressed height of approximately 8.25 inches, a pocketed height of approximately 6.5 inches, a diameter of approximately 70 mm, a stiffness of approximately 0.45 lb/in, at least 5 helical convolutions, and a center convolution pitch dimension of approximately 55.6 mm;
- the inside helical coil having an uncompressed height of approximately 5.75 inches, a diameter of approximately 32.8 mm, a stiffness of approximately 1.9 lb/in, at least 7 helical convolutions, and a center convolution pitch dimension of approximately 20 mm;
- wherein each coil-in-coil spring is double annealed.
1 more element
Dependencies are inferred from the claim text.