Chainless bicycle drive system
US6394477B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Mar 10, 2000 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Mar 10, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19828
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pedal driven wheeled vehicle includes a frame and a driven wheel with a driven hub engaged with the frame. A driven system includes a first pedal crank arm and a second crank arm. A first pedal is located at a removed end of the first pedal crank arm, and a second pedal is located at a removed end of the second pedal crank arm. A pedal driven shaft includes a longitudinal axis, a first end, and a second end and is rotatably mounted to the frame of the pedal driven shaft. The second pedal crank arm attaches to the second end of the pedal driven shaft. The pedal driven shaft includes a first gear mounted thereto such that the first gear rotates in a first plane. A hub engagement gear engages with the driven wheel hub of the driven wheel. A driven shaft includes a first and a second end. The first end includes a first end worm gear for engagement with the first gear of the pedal driven shaft, and the second end includes a second end worm gear for engagement with the hub engagement gear such that when the pedal crank arms are rotated the rear wheel rotates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.