Sinuous spring module box spring assembly

A bedding foundation box spring assembly comprising,

• a bottom, substantially rectangular, base frame having side and end members,
• a substantially planar rectangular top wire grid, said grid comprising a border wire and first and second sets of wires, said first set of wires comprising a plurality of longitudinally extending, spaced, parallel wires, said second set of wires comprising a plurality of transversely extending, spaced, parallel wires, the ends of both said first and second sets of wires being fixedly connected to said border wire,
• a plurality of coil springs interconnecting said base frame and said top wire grid,
• a plurality of sinuous wire springs interconnecting said base frame and said wire grid, said sinuous wire springs each comprising a sinuous spring strip made from wire bent back and forth to have oppositely facing edge loops interconnected by straight torsion bar sections, said strip being formed into a generally U-shaped configuration having substantially vertical legs interconnected by a flat bottom section, said flat bottom section of each of said sinuous wire springs being fixedly secured to said base frame and the upper ends of said vertical legs of each of said sinuous springs being fixedly secured to said top wire grid, and
• each of said vertical legs of each of said U-shaped sinuous wire springs consisting of three edge loops interconnected by a pair of straight torsion bars, the topmost one of the edge loops being connected to a third free end straight torsion bar, and said flat bottom section of each of said U-shaped sinuous wire springs consisting of a single edge loop and a pair of straight torsion bars connected to opposite ends of said single edge loop.

A bedding foundation box spring comprising,

• a bottom, substantially rectangular, base frame having side and end members and slats extending between said side members,
• a substantially planar rectangular top wire grid, said grid comprising a border wire and first and second sets of wires, said border wire being of rectangular configuration and surrounding said first and second sets of wires, said first set of wires comprising a plurality of longitudinally extending, spaced, parallel wires and said second set of wires comprising a plurality of transversely extending, spaced, parallel wires, said first and second sets of wires intersecting one another and being welded together at their intersections, said first and second sets of wires being fixedly connected to said border wires,
• a plurality of sinuous wire springs interconnecting said base frame and said wire grid, said sinuous wire springs each comprising a sinuous spring strip made from wire bent back and forth to have oppositely facing edge loops interconnected by straight torsion bar sections, each of said strips being formed into a generally U-shaped configuration having substantially vertical legs interconnected by a substantially flat bottom section, said flat bottom section of each of said sinuous wire springs being fixedly secured to said base frame and the upper ends of said vertical legs of each of said sinuous springs being fixedly secured to said top wire grid, and
• each of said vertical legs of each of said U-shaped sinuous wire springs consisting of three edge loops interconnected by a pair of straight torsion bars, the topmost one of the edge loops being connected to a third free end straight torsion bar, and said flat bottom section of each of said U-shaped sinuous wire springs consisting of a single edge loop and a pair of straight torsion bars connected to opposite ends of said single edge loop.