Box spring assembly with improved spring installation capability

Claim 1

In a box spring assembly which includes a generally rectangular frame, a plurality of vertically deflectable wire springs mounted on said frame and connected to each other so as to yieldably resist downwardly directed bedding loads, each of said springs being formed of spring steel wire and having a generally horizontal body portion arranged above said frame and downwardly extending end portions, each of said end portions having an upper section and a lower section, said upper section comprising a plurality of substantially horizontal torsion bars and a plurality of angularly arranged connecting bars connected to and extending between said torsion bars, some of said torsion bars constituting inner torsion bars and others of said torsion bars constituting outer torsion bars, said inner torsion bars in each end portion being located in closer proximity to the other end portion of said spring than said outer torsion bars, said torsion bars being movable in response to torsional stressing thereof to enable downward yieldable collapsing deflection of said end portion, said lower section comprising a generally upright, upwardly and inwardly inclined column of wire, said column of wire terminating at the lower end thereof in a frame engaging torsion bar which constitutes an outer torsion bar and is spaced from the other end portion of said spring a distance at least as great as all of the other outer torsion bars in said one end portion, and connecting means securing said frame engaging torsion bar to said frame, said column of wire terminating at the upper end thereof at the lowermost of said outer torsion bars other than said frame engaging torsion bar, that connecting bar which connects such lowermost torsion bar to the immediately succeeding and lowermost, inner torsion bar being disposed at an inclination in the same upward and inward sense as said column of wire but more horizontal than said column of wire.