Box spring assembly
US4057860A · kind A · utility
5Cited by
4References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1975 |
| Grant date | Nov 15, 1977 |
| Priority date | — |
| Expiry date | Oct 10, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C23/043
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A box spring assembly for use as a supporting foundation for a bed mattress. The assembly comprises a wooden frame, slats, spiral springs, edge coil springs, a border wire and a welded wire top grid. The spiral springs extend transverse to the wooden slats and alternate revolutions of the spiral springs are secured to the slats. At the top, the spiral springs are supported by the welded wire grid. Side edge reinforcement and resiliency is provided by coil springs, each of which is secured at the bottom to the wooden frame and at the top to the border wire and grid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.