Support grid for upholstered seating
US4191424A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 17, 1978 |
| Grant date | Mar 4, 1980 |
| Priority date | — |
| Expiry date | Jul 17, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C7/287
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A support grid for upholstered seating of the "bucket" type, consisting of a series of closely space transversely extending spring cross wires defining the main cushion area of either a seat bottom or a seat back, connected at their respective ends to a pair of side spring wires, and angled upwardly and outwardly from the side wires to form the seat "wings" or bolsters, the novelty of the invention lying in the connection of the cross wires to the side wires, in which each cross wire has an S-bend formed therein in a plane normal to the main cushion area, the loop of the S-bend adjoining the main cushion area containing the associated side wire, whereby loading of the associated wing portion tends to open said loop rather than clamping it more tightly about the side wire, so that metal fatigue is reduced, and the other loop of the S-bend opening outwardly, tending to distribute the flexure strains along a longer section of the wire to further reduce metal fatigue, selection of the radius of curvature of this last named loop serving to adjust the stiffness or resistance to flexure of the wing portion. The grid may be used as a spring base for upholstery padding by suspending the sid…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.