Bent wire spring unit
US4577841A · kind A · utility
17Cited by
13References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 18, 1984 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Jul 18, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C23/0438
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A spring assembly comprising a base frame and a grid frame held in spaced, parallel relation by transversely and longitudinally-spaced spring units, some of which are bent wire spring units and others of which are coil spring units, each bent wire spring unit being yieldable in bending and torsion to pressure applied to their upper ends, and symmetrical with respect to its vertical axes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.