Bedding or seating product made with coil springs having unknotted end turns
US7386897B2 · kind B2 · utility
21Cited by
15References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2005 |
| Grant date | Jun 17, 2008 |
| Priority date | — |
| Expiry date | Feb 27, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49613
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
Disclosed herein is a bedding or seating product having a spring core comprising coil springs having unknotted end turns made from high tensile strength wire. In each embodiment, the end turns of the coil springs are generally U-shaped having one leg longer than the other, the legs being joined by an arcuate connector. The springs are oriented in the spring core such that a long leg of one end turn abuts a short leg of the adjacent end turn prior to be wrapped in helical lacing wire. The high tensile wire enables the coil springs to be manufactured using less wire than heretofore possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.