Coil spring assembly
US4095297A · kind A · utility
9Cited by
5References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 11, 1977 |
| Grant date | Jun 20, 1978 |
| Priority date | — |
| Expiry date | May 11, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C27/07
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A coil spring assembly stable against torque twist deterioration, assembled of rows of coils of alternate right and left-hand, the coils having wound ends, the end turns of each coil having linear portions normal to the row and interconnected with linear portions of adjacent coils by cross helicals extending across the assembly normal to the rows.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.