Drop-in seat spring unit assembly

Details Drop-in seat spring unit assembly Drop-in seat spring unit assembly

1997-06-27

1999-07-20

Poon, Peter M.

Spring devices

Spring panel

Spring means spacing loading surface vertically from plane...

5309, F16F 300

Patent

active

059246820

ABSTRACT:
A drop-in spring unit seat assembly includes a top grid spaced from a bottom grid having conical springs positioned therebetween. The conical springs are snap-fit for attachment to the top grid and/or bottom grid and require no mechanical fasteners nor complicated tools for such attachment. A pair of opposed detents are formed in the top and/or bottom turns of the spring and/or the detents formed in grid wires extending on the top and/or bottom grid. The opposed detent in the springs snap-fit engage with the depressions in the grid wires and a plurality of springs are interposed between the top grid and bottom grid to form the spring unit assembly. In selected embodiments, the spring unit includes multiple bottom grids attached via springs to a single top grid. The assembled spring unit can be dropped into a chair, seat or other article of furniture for attachment to and support by a pair of spaced frame members of the chair or other article of furniture.

REFERENCES:
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patent: 4480823 (1984-11-01), Marcinczyk et al.
patent: 4790038 (1988-12-01), Ikeda
patent: 4819920 (1989-04-01), Barber
patent: 5940255 (1991-08-01), Barber, Jr.
Leggett & Platt, Inc., Coil Flex Advanced Coil Spring Seating.

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