Coil spring assembly with grid and base frame
US4426070A · kind A · utility
14Cited by
11References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1981 |
| Grant date | Jan 17, 1984 |
| Priority date | — |
| Expiry date | Aug 31, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C23/043
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A spring assembly comprising a base frame, a grid frame, coils connected at their lower ends and upper ends to the respective frames wherein the grid frame is provided with crossing longitudinal and transverse wires so positioned as to enable spacing the coils transversely of the grid frame at a uniform spacing and wherein the longitudinal wires of the grid frame are provided with deviations for receiving diametral portions of the coils and retaining the latter from movement relative to the grid frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.