Spring units
US6668406B2 · kind B2 · utility
22Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1999 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Dec 27, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C23/0433
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A spring unit (2) for incorporation into a bed, divan bed, mattress, or other upholstery unit comprises a first spring (4) and a second spring located (6) within said first spring (4). The first spring (4) may be a pocketted spring, or the second spring may be a pocketted spring, or both of said springs may be pocketted springs, the pockets of said pocketted springs being composed of a woven material and/or a synthetic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.