Combination round coil spring and rectangular torsion coil spring assembly
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United States of America Patent
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Nov 26, 1985
Grant Date -
N/A
app pub date -
May 16, 1983
filing date -
May 16, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A core spring assembly combines the use of rows and/or columns of round coil springs with rows and/or columns of rectangular torsion bar coil springs, all interconnected in a top plane by a welded wire grid so as to create a spring core assembly for a bedding mattress or box spring. In one preferred form, the rectangular torsion bar coil springs are located about the periphery of the spring assembly while in another embodiment the rectangular torsion bar coil springs are all located in the center one-third of the spring assembly so as to increase the firmness of that center section of the unit.
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