Spring devices – Coil – Conical
Patent
1978-02-13
1979-07-10
Halvosa, George E. A.
Spring devices
Coil
Conical
5248, 5256, 267 91, 267100, 267180, F16F 108
Patent
active
041605446
ABSTRACT:
An improved single cone coil spring and an improved box spring assembly made from the improved single cone coil springs. The box spring assembly comprises a base frame, a series of the improved small diameter single cone coil springs and a welded wire grid, the coil springs being connected at their bottom ends to the base frame and connected at their top ends to the welded wire grid. The coil springs are established in a plurality of rows and columns throughout the box spring assembly, at least one transverse wire and at least one longitudinal wire of the wire grid span all coil springs within each row and column, respectively. Further, a supplemental transverse wire is positioned between adjacent coil spring rows, and is of a length equal to at least one of the coil springs' transverse wires adjacent thereto. All crossover points of all the grid's transverse and longitudinal wires are welded to establish the welded wire grid. The improved single cone coil springs are all of the same diameter, that diameter being less than three and one-half inches in the top loop of the coil springs. The coil spring columns are separated one from the other, and the coil spring rows are separated one from the other, by a distance at least as great as the diameter of the coil springs.
REFERENCES:
patent: 3270354 (1966-09-01), Ciampa et al.
patent: 3577574 (1971-05-01), Ciampa
patent: 3767180 (1973-10-01), Kaiser
patent: 3774248 (1973-11-01), Huras et al.
patent: 3916463 (1975-11-01), Higgins
Halvosa George E. A.
Leggett & Platt Incorporated
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