A support structure and vertical isolation structure may include a plurality of spring coils and a mesh network. Each spring coil of the plurality of spring coils includes a spring, a cap, and a floating connector. The cap is configured to engage the spring. The floating connector is disposed in a middle of the spring. The mesh network secures a first spring coil of the plurality of spring coils to a second spring coil of the plurality of spring coils by passing through the floating connector of each of the first spring coil and the second spring coil.

A coil-in-coil spring is provided that exhibits a variable loading response as the spring is compressed. The coil-in-coil spring comprises a continuous wire forming’ an inner coil having a substantially conical shape and an outer coil extending around the inner coil and having a substantially cylindrical shape. The inner coil includes a plurality of helical convolutions with diameters that progressively decrease as the plurality of helical convolutions extend from a lower end of the coil-in-coil spring to an upper end convolution of the inner coil. The inner coil also has an uncompressed height that is about 75% of the uncompressed height of the outer coil, A mattress is further provided and includes the coil-in-coil springs arranged in a matrix.

A support structure and vertical isolation structure may include a plurality of spring coils and a mesh network. Each spring coil of the plurality of spring coils includes a spring, a cap, and a floating connector. The cap is configured to engage the spring. The floating connector is disposed in a middle of the spring. The mesh network secures a first spring coil of the plurality of spring coils to a second spring coil of the plurality of spring coils by passing through the floating connector of each of the first spring coil and the second spring coil.

A support structure and vertical isolation structure may include a plurality of spring coils and a mesh network. Each spring coil of the plurality of spring coils includes a spring, a cap, and a floating connector. The cap is configured to engage the spring. The floating connector is disposed in a middle of the spring. The mesh network secures a first spring coil of the plurality of spring coils to a second spring coil of the plurality of spring coils by passing through the floating connector of each of the first spring coil and the second spring coil.

A support structure and vertical isolation structure may include a plurality of spring coils and a mesh network. Each spring coil of the plurality of spring coils includes a spring, a cap, and a floating connector. The cap is configured to engage the spring. The floating connector is disposed in a middle of the spring. The mesh network secures a first spring coil of the plurality of spring coils to a second spring coil of the plurality of spring coils by passing through the floating connector of each of the first spring coil and the second spring coil.

A pocketed coil spring assembly is provided that comprises a plurality of pocketed coil springs arranged in a row. Each of the pocketed coil springs includes a coil spring surrounded by a flexible enclosure. A seam is positioned between each one of the plurality of pocketed coil springs and an adjacent one of the plurality of pocketed coil springs. Each seam is configured to allow one or more ends of each of the pocketed coil springs to move independently of the corresponding end of an adjacent one of the pocketed coil springs. Support cushions, such as mattresses, that include a plurality of such pocketed coil spring assemblies arranged in a matrix are further provided.

A coil-in-coil spring is provided that exhibits a variable loading response as the spring is compressed. The coil-in-coil spring comprises a continuous wire forming an inner coil having a substantially conical shape and an outer coil extending around the inner coil and having a substantially cylindrical shape. The inner coil includes a plurality of helical convolutions with diameters that progressively decrease as the plurality of helical convolutions extend from a lower end of the coil-in-coil spring to an upper end convolution of the inner coil. The inner coil also has an uncompressed height that is about 75% of the uncompressed height of the outer coil, A mattress is further provided and includes the coil-in-coil springs arranged in a matrix.

A spring core is provided that includes a head portion, a foot portion, and a middle portion positioned between the head portion and the foot portion. The head portion and the foot portion each include a plurality of coil springs arranged in a matrix with each coil spring of the head portion and foot portion having a first height and a second height, respectively. The middle portion also includes a plurality of coil springs arranged in a matrix, but with each coil spring of the middle portion having a third height and with the middle portion providing greater support, less motion transfer, or both greater support and less motion transfer than the head portion and the foot portion.

A method for producing an upholstery spring, such as for upholstered furniture or mattresses includes several steps. One of the steps includes at least regionally applying a heat-sensitive colour indicator to a spring steel wire before, during or after the bending of the spring steel wire. The spring steel wire is heated to at least the changeover temperature of the colour indicator. The upholstery spring is then finished.

A coil spring comprises a continuous wire forming a lowermost convolution, an uppermost convolution, and a plurality of helical intermediate convolutions. The coil spring is divided into an upper portion and a lower portion. The intermediate convolutions of the lower portion have a diameter greater than or equal to a lower minimum diameter, and the pitch between each of the convolutions of the lower portion is greater than or equal to a lower minimum pitch. The intermediate convolutions of the upper portion have a diameter greater than or equal to an upper minimum diameter, and the pitch between each of the convolutions of the upper portion is less than or equal to an upper maximum pitch. The upper minimum diameter is greater than, less than, or equal to the lower minimum diameter, and the upper maximum pitch is less than the lower minimum pitch to provide a non-linear and variable response.