Twist-grip device for operating the gears of a bicycle
US5134897A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1990 |
| Grant date | Aug 4, 1992 |
| Priority date | — |
| Expiry date | Oct 18, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20486
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A twist-grip device for operating the gears of a bicycle includes indexing associated with the hand-grip for snap-locating the hand-grip in the various positions corresponding to the engagement of the various gear ratios. The device includes a spring which biasses the hand-grip in the opposite sense from the sense of biassing of the spring of the derailleur which effects the engagement of the various gear ratios. The device also includes a screw for adjusting the average torque which needs to be applied to the hand-grip to snap-rotate the hand-grip between two successive positions. The rotation of the screw varies the preloading of a resilient expandable bush associated with the indexing pin springs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.