Foundation unit having a posturized inner border
US4122566A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1977 |
| Grant date | Oct 31, 1978 |
| Priority date | — |
| Expiry date | Mar 16, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C23/043
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A spring foundation unit having one or more pairs of inner border members on the top and bottom surfaces of the unit. In a conventional fashion, the spring unit has a plurality of transverse rows and longitudinal columns of coil springs, and top and bottom perimeter border wires extending along the outer periphery of the unit and attached to outer coil springs of the transverse rows and longitudinal columns. The inner border members have side elements extending parallel to opposed sides of the unit, with one or more spring widths separating the side elements from the perimeter of the unit. Each side element has a free end which is attached to an end section of the perimeter border wire, and a cross-connecting element interconnecting the opposite ends of the opposed side elements of each inner border member. In one embodiment of the invention, the cross-connecting elements of each pair of inner border members are straight and have at least one spring width separating them. In another embodiment of the invention, the cross-connecting elements are bent in the direction of the end section of the perimeter border member to which its interconnected side elements are attached.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.