Bent wire spring unit
US4721290A · kind A · utility
6Cited by
3References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 2, 1987 |
| Grant date | Jan 26, 1988 |
| Priority date | — |
| Expiry date | Apr 2, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C23/0438
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A bent wire soring unit for disposition between a base frame and grid frame disposed in spaced, parallel relation to each other includes a lower attaching element for attachment to the base frame and an upper attaching element for attachment to the grid frame. The lower and upper attaching elements are disposed in spaced, parallel planes and transversely-spaced, substantially perpendicular supports connect the lower and upper attaching elements such as to permit the upper and lower attaching elements to move relative to each other in response to pressure applied perpendicularly to the upper attaching elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.