Seat Assembly Having Sinuous Springs

Abstract

A seat assembly for insertion into a piece of furniture has a frame having opposed sides. Each side may have openings therein for supporting clips. Upper and lower sinuous wires extend generally across the frame. Upper stabilizer wires are secured to the upper sinuous wires and maintain the spacing thereof. The clips secure each of the sinuous wires to the frame. Coil springs are secured to the upper stabilizer wires and the lower sinuous wires. The clips securing the upper and lower sinuous wires alternate along the sides of the frame.

Having described the invention, what is claimed is: 
     
         1 . A seat assembly comprising:
 a frame having four sides;   a plurality of clips attached to each side of opposed sides of the frame;   a plurality of generally parallel upper sinuous wires, each of the upper sinuous wires extending between the opposed sides of the frame, end portions of each of the upper sinuous wires being secured in opposed clips;   a plurality of upper stabilizer wires extending transversely to and fastened to the upper sinuous wires;   a plurality of generally parallel lower sinuous wires, each of the lower sinuous wires extending between the opposed sides of the frame, end portions of each of the lower sinuous wires being secured in opposed clips;   a plurality of coil springs, each coil spring having an upper end turn, a lower end turn and a plurality of central convolutions between the end turns, the upper end turn of each coil spring being secured to the upper stabilizer wires and the lower end turn of each coil spring being secured to one of the lower sinuous wires, wherein the clips securing the upper and lower sinuous wires to the opposed sides of the frame alternate along the opposed sides of the frame.   
     
     
         2 . The seat assembly of  claim 1  wherein each of the stabilizer wires is coated to prevent wire-on-wire noise. 
     
     
         3 . The seat assembly of  claim 1  wherein each of the coil springs has upper and lower end turns of different diameters. 
     
     
         4 . The seat assembly of  claim 1  wherein each of the coil springs has a knotted upper end turn. 
     
     
         5 . The seat assembly of  claim 1  wherein each of the coil springs has an unknotted lower end turn. 
     
     
         6 . The seat assembly of  claim 1  wherein only the lower end turn of each of the coil springs is secured to one of the lower sinuous wires. 
     
     
         7 . A seat assembly comprising:
 a frame having four sides;   a plurality of clips attached to opposed sides of the frame;   a plurality of generally parallel upper sinuous wires, each of the upper sinuous wires extending between the opposed sides of the frame, end portions of each of the upper sinuous wires being secured in opposed clips;   a plurality of upper stabilizer wires extending transversely to and fastened to the upper sinuous wires;   a plurality of generally parallel lower sinuous wires, each of the lower sinuous wires extending between the opposed sides of the frame, end portions of each of the lower sinuous wires being secured in opposed clips;   a plurality of coil springs, each coil spring having an upper end turn, a lower end turn and a plurality of central convolutions between the end turns, the upper end turn of each coil spring being secured to the upper stabilizer wires and the lower end turn of each coil spring being secured to one of the lower sinuous wires, wherein only the lower end turn of each of the coil springs is secured to the sinuous wires.   
     
     
         8 . The seat assembly of  claim 7  wherein each of the stabilizer wires are coated to prevent wire-on-wire noise. 
     
     
         9 . The seat assembly of  claim 7  wherein each of the coil springs has upper and lower end turns of different diameters. 
     
     
         10 . The seat assembly of  claim 7  wherein each of the coil springs has a knotted upper end turn. 
     
     
         11 . The seat assembly of  claim 7  wherein each of the coil springs has an unknotted lower end turn. 
     
     
         12 . The seat assembly of  claim 7  wherein the clips securing the upper sinuous wires and the clips securing the lower sinuous wires alternate along the opposed sides of the frame. 
     
     
         13 . A seat assembly comprising:
 a frame;   a plurality of clips secured to each side of opposed sides of the frame;   a plurality of generally parallel upper and lower sinuous wires, each of the upper and lower sinuous wires extending between two of the clips;   a plurality of upper stabilizer wires secured to the upper sinuous wires;   a plurality of coil springs, each coil spring having an upper end turn, a lower end turn and a plurality of central convolutions between the end turns, the upper end turn of each coil spring being secured to the upper stabilizer wires and the lower end turn of each coil spring being secured to one of the lower sinuous wires, wherein the upper and lower sinuous wires alternate longitudinally along the opposed sides of the frame.   
     
     
         14 . The seat assembly of  claim 13  wherein each of the stabilizer wires are coated to prevent wire-on-wire noise. 
     
     
         15 . The seat assembly of  claim 13  wherein each of the coil springs has upper and lower end turns of different diameters. 
     
     
         16 . The seat assembly of  claim 13  wherein each of the coil springs has a knotted upper end turn. 
     
     
         17 . The seat assembly of  claim 13  wherein each of the coil springs has an unknotted lower end turn. 
     
     
         18 . The seat assembly of  claim 13  wherein only the lower end turn of each of the coil springs is secured to the sinuous wires.