Spring assembly with helical coils of spring wire with unknotted ends
US4781360A · kind A · utility
31Cited by
13References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 7, 1987 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Dec 7, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C27/07
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A spring assembly wherein there is a rectangular border wire and there are coils disposed in spaced, parallel rows within the border wire. The coils in the rows of coils lap and are connected by helices of wire. The helices of wire connect the adjacent rows of coils, and the coils adjacent the border wire are connected thereto by a helix of wire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.