Coil spring and spring assembly

Details Coil spring and spring assembly Coil spring and spring assembly

A - Human Necessities

47

C

360/12

A47C 23/043 (2006.01) A47C 27/06 (2006.01) A47C 27/07 (2006.01)

Patent

CA 1127324

A B S T R A C T An improved spring assembly and coil spring therefor is provided, for a mattress or the like. The spring assembly includes a plurality of spiral coil springs, arranged in substantially parallel rows, a plurality of cross helicals lacing together adjacent springs in the same row, and at least a pair of adjacent coil springs, with laced-together terminal convolutions, that are restricted in their movement relative each other to a maximum angle of deflection. Such pairs of coil springs have a hinging action, relative one another, about the adjacent offset portions of their terminal convolutions, until the maximum deflection angle between the offsets is reached. Further loading of one spring after this angle is reached results in compression of adjacent springs and greater resistance to loading for a given degree of spring compression, i.e. greater firmness.

329821

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