Abstract: A nestably stackable bedding foundation assembly which replaces the traditional border wire and disposed coil spring foundation assembly in a so-called box spring. The nestably stackable foundation assembly may be nestably stacked with numerous other such assemblies for transportation, thereby avoiding the need to compress and tie the assembly for shipping. A bedding foundation comprises a rectangular base, a nestably stackable bedding foundation assembly fixedly attached atop the base, and spring means disposed between and connected to the base and the nestably stackable assembly.

Abstract: A bedding foundation unit having a top planar portion defined by two pluralities of spaced parallel grid wires, and a rigid frame spaced apart from the top planar portion by a plurality of modular springs. Each modular spring is formed from one piece of wire and has a top section, two vertical legs and two foot sections, with each of the vertical legs having at least one arcuate portion. The top section of most, if not all, of the modular springs extend longitudinally of the foundation and are connected to the top planar portion in a snap-fit manner, each top section of each modular spring being held in place by three grid wires and one grid wire below the top section.

Abstract: A box spring assembly includes a base frame, a top wire grid and a plurality of modular wire springs interconnecting the top wire grid and the base frame. The modular wire springs each comprises a unitary wire formed into an inverted U-shaped configuration with the closed end of each U-shaped spring having two edge connector bars and a diagonally extending central connector bar interconnected at its opposite ends to the edge connector bars by attachment segments. The closed end of the modular spring is snap-fit to the top wire grid so each of the edge connector bars supports separate portions of the top wire grid at intersections within the wire grid. The vertical legs of the modular spring include at least three torsion bars and two edge loops of differing radii. The edge loops, because of their differing radii impart differing softness or deflection characteristics to the modular springs.

Abstract: A bedding foundation unit having a top planar portion defined by two pluralities of spaced parallel grid wires, and a rigid frame spaced apart from the top planar portion by a plurality of modular springs. The modular springs are connected to the top planar portion in a snap-fit manner, each snap-fit end of each modular spring being held in place by three grid wires above and one grid wire below the snap-fit end.

Abstract: A bedding foundation unit having a top planar portion defined by two pluralities of spaced parallel grid wires, and a rigid frame spaced apart from the top planar portion by a plurality of modular springs. Most, if not all, of the modular springs extend longitudinally of the foundation and are connected to the top planar portion in a snap-fit manner, each snap-fit end of each modular spring being held in place by three grid wires above and one grid wire below the snap-fit end.

Abstract: A nestably stackable bedding foundation assembly which replaces the traditional border wire and disposed coil spring foundation assembly in a so-called box spring. The nestably stackable foundation assembly may be nestably stacked with numerous other such assemblies for transportation, thereby avoiding the need to compress and tie the assembly for shipping.

Abstract: A box spring assembly includes a base frame, a top wire grid and a plurality of formed wire springs interconnecting the top wire grid and the base frame. The formed wire springs each comprises a wire strip formed into an inverted U-shaped configuration with the closed end of each U-shaped spring generally Z-shaped and attached to the top wire grid by a snap-fit connection and the free ends at the bottom of the U-shaped spring being attached to the base frame.