Spring devices – Spring panel – Spring means spacing loading surface vertically from plane...
Patent
1990-06-22
1992-10-06
Butler, Douglas C.
Spring devices
Spring panel
Spring means spacing loading surface vertically from plane...
5247, 5255, 267107, F16F 304
Patent
active
051525097
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.
REFERENCES:
patent: 3574240 (1971-04-01), Slominski
patent: 4619445 (1986-10-01), Sasaki
patent: 4685659 (1987-08-01), Hagemeister
patent: 4862531 (1989-09-01), Wells
patent: 4862532 (1989-09-01), Wells et al.
patent: 4896386 (1990-01-01), Ogle et al.
Ogle Steven E.
Wells Thomas J.
Butler Douglas C.
Leggett & Platt Incorporated
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