Article including an endless coil spring
US3966183A · kind A · utility
9Cited by
4References
9Claims
0Family size
Assignees
Inventor
Key dates
| Filing date | Apr 26, 1974 |
| Grant date | Jun 29, 1976 |
| Priority date | — |
| Expiry date | Apr 26, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F1/045
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An endless coil spring whose convolutions surround a substantially circular line which extends through the hollow interior of the coil spring. This line surrounds inner portions of the convolutions which press against each other. The convolutions have outer portions which surround the line and which are spaced from each other with these outer portions of the convolutions circumferentially offset with respect to the inner portions thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.