Spring element for a foundation unit and foundation unit employing a spring element
US5005809A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 30, 1989 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Oct 30, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C23/02
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A spring element for a foundation unit and a foundation unit employing the spring element. The foundation unit is of the type having a top wire grid structure and a wooden bottom structure, with a plurality of the spring elements being disposed in space relationship between the grid structure and the bottom substructure. The spring elements include spaced support legs extending from a top portion, with the legs converging toward one another. Each leg has a series of spaced support segments, with the support segments lying generally in a single plane and extending oppositely from one another in a zig-zag fashion between the top portion and an attachment segment. Torsion segments are located between adjacent support segments, with the torsion segments extending generally perpendicular to the plane of the support legs. Suitable links are used to interconnect each torsion segment with its adjacent support segments of each support leg.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.