Power-saving driving device for treading pedals of bicycle
US6516685B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 5, 2001 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Mar 5, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2165
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A power-saving driving device for treading the pedals of a bicycle is disclosed. Thereby, the driver may use a smaller force to tread a bicycle so that a higher efficiency is provided. The power-saving device comprises two crank axles. The two crank axles are fixed to a gear box. Two spur gears are engaged to the gear box, and two free wheels are installed at an exterior of the gear box. The two spur gears and two free wheels are connected to the two crank axles. The two free wheels are connected through a chain; and a chain wheel and a bearing are connected to the crank axles. Thereby, the forces from the right and left legs can be outputted effectively. The driving of a bicycle and the power necessary are improved. Therefore, the driver treads the pedals with a smaller depth and thus the physical consumption is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.