Coil-in-coil springs and innersprings

A - Human Necessities – 47 – C

Patent

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A47C 23/04 (2006.01)

Patent

CA 2758906

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.

La présente invention se rapporte à un ressort intérieur de matelas comportant des ressorts à enroulements imbriqués disposés en un ensemble. Chaque ressort à enroulements imbriqués comporte un enroulement hélicoïdal extérieur et un enroulement hélicoïdal intérieur, l'enroulement hélicoïdal extérieur ayant une hauteur et un diamètre supérieurs à ceux de l'enroulement hélicoïdal intérieur, chaque enroulement ayant une double force de rappel située entre celle de l'enroulement hélicoïdal extérieur et celle des enroulements hélicoïdaux extérieur et intérieur combinés. Les ressorts à enroulements imbriqués peuvent être introduits dans des poches contenues dans un ressort intérieur de matelas ou enlevés de celles-ci.

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