Furniture assembly

Details Furniture assembly Furniture assembly

1976-01-23

1976-12-21

Mitchell, James C.

Spring devices

Spring panel

Spring means spacing loading surface vertically from plane...

5247, 267107, A47C 2708, F16F 300

Patent

active

039984427

ABSTRACT:
A furniture frame construction of the disclosure includes a framework of steel frame members that support a spring assembly for a seat cushion. Front and rear frame members of the framework are fabricated from relatively thin steel stock and have closed cross-sections with projecting flanges secured to each other. End frame members of the framework are also fabricated from relatively thin steel stock with channel cross-sections and interconnect the front and rear frame members with each other. The spring assembly includes a primary spring of the formed wire type extending between the front and rear frame members. The front end of the primary spring includes a fishmouth section that spaces a support section of this spring above the front frame member. The rear end of the primary spring includes a helical coil with a tail that supports the rear end of the support section on the rear frame member. An auxiliary spring of the spring assembly is secured to the lower side of the primary spring support section. The auxiliary spring includes transverse ends that are clipped to transverse torsion bars of the primary spring support section with a plurality of torsion bars of the support section located between the transverse ends. The auxiliary spring has an intermediate portion including an intermediate transverse torsion bar and a pair of diagonally extending legs that connect this torsion bar with the transverse ends in Z-shaped configurations. The auxiliary spring provides increased rigidity to the support section in the area where seating forces are applied. The front diagonally extending leg of the auxiliary spring is shorter than the rear diagonally extending leg and the intermediate torsion bar connecting the adjacent ends of these legs is located adjacent a torsion bar of the primary spring support section.

REFERENCES:
patent: 2657740 (1953-11-01), Daniels et al.
patent: 2764227 (1956-09-01), Williams et al.

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