A - Human Necessities – 47 – C
Patent
A - Human Necessities
47
C
360/4
A47C 23/02 (2006.01) A47C 23/043 (2006.01)
Patent
CA 1301960
ABSTRACT OF THE DISCLOSURE A non-coil spring is disclosed for use in a box spring assembly. The spring is a limited deflection spring having a lower portion for mounting to the frame of the box spring assembly, an upper attaching platform portion for attaching to a wire mattress support deck and an intermediate portion for resiliently supporting the upper attaching platform spaced from the lower mounting portion. The intermediate portion includes a pair of collapsible column sections having middle torsion bars which are connected to upper torsion bars in the attaching platform and lower torsion bars in the mounting portion by connecting bars which each diverge away from an end of the middle torsion bars in the column sections, During loading, these middle torsion bars in the column sections move toward each other until they engage in a cross bucking fashion to limit further deflection of the spring. At full deflection the platform is a predetermined spaced distance above the engaged middle torsion bars. The platform is allowed to resiliently pivot relative to the engaged middle torsion bars to conform to the bedding load distribution to improve comfort. For a given width spring, the torsional stresses in the torsion bards are lower than in other spring designs thus increasing the life of the spring.
601139
Dabney Upton R.
Hoover Group Inc.
Macrae & Co.
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