Swivel device for preventing twisting of strings subjected to torsional force
US5035667A · kind A · utility
2Cited by
6References
4Claims
0Family size
Inventor
Key dates
| Filing date | Sep 8, 1989 |
| Grant date | Jul 30, 1991 |
| Priority date | — |
| Expiry date | Sep 8, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T24/3904
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A device for eliminating the twisting and accompanying stress associated with yo-yo strings during operation by providing for rotation of the string about its central elongate axis without rotation of the yo-yo. The device of the present invention is inserted in-line between the yo-yo and the operator grip. The device includes two segments attached by a pivotal axis concentric with the string central axis. The string is divided into two segments, a device-yo-yo segment and a device-operator segment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.