Spring structure for a mattress innerspring having coaxial coil units
US6149143A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1998 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Nov 10, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C23/0433
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An innerspring structure for a mattress comprises a row of outer coils formed from a continuous piece of wire with the coils interconnected with interconnection segments and a row of inner coils similarly formed. The interconnection segments of the coils form coil heads for pairs of adjacent coils and each head includes a first linear portion disposed generally parallel to the row. The row of inner coils is positioned together and generally coaxially with the row of outer coils for forming reinforced coil units. A helical lacing structure winds around portions of the inner and outer coils to couple the coils together into reinforced coil units and the first linear portions of the coils are configured for being captured with at least approximately three loops of the helical lacing structure for forming a row of reinforced coil units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.