Resilient unit with different major surfaces
US11800937B2 · kind B2 · utility
0Cited by
100References
31Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 8, 2013 |
| Grant date | Oct 31, 2023 |
| Priority date | — |
| Expiry date | Aug 8, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/481
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A resilient unit comprises a number of wire coil springs 12, each of which is located within its own discrete pocket 14 formed by first, upper and second, lower layers 14a and 14b of material, preferably of non-woven material. The two layers 14a and 14b have been thermally, or ultrasonically, welded together at points 16 between the adjacent springs to create the pockets. The upper layer of material 14a differs from the lower layer of material 14b in respect of at least one characteristic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.