Gear shift device
US8387477B2 · kind B2 · utility
9Cited by
14References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2010 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Sep 19, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20116
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A gear shift device is provided which changes speed by transmitting rotation of a shift spindle by gear shift operation input to rotation of a shift drum through an intermittent feed mechanism and a lost motion mechanism. An upstream rotation holding mechanism is provided to hold in a required rotational position an upstream rotating member of the lost motion mechanism which is rotated by gear shift operation input through the intermittent feed mechanism. When a required level of gear shift operation is done, the gear shift device changes speed adequately, without continuing gear shift operation, and thus improves operability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.