Front speed changing device
US6491597B2 · kind B2 · utility
8Cited by
9References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 7, 2001 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | May 7, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62M9/137
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A front speed changing device comprises a base, a first link rod, a second link rod, a chain guiding member, a driven member, and a linking member, which form together a six-link-rod linking mechanism. The driven member is fastened with a pull cord. When the pull cord is pulled, the driven member swivels to link each rod member to engage in the swiveling action, thereby driving the chain guiding member to guide a chain to displace horizontally to attain the speed change.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.