Automatic bicycle hub transmission using flyweights
US6010425A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 1998 |
| Grant date | Jan 4, 2000 |
| Priority date | — |
| Expiry date | Aug 3, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62M11/16
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A bicycle hub transmission includes a hub axle, a driver rotatably mounted to the hub axle, a slave rotatably mounted to the hub axle, a power transmitting mechanism disposed between the driver and the slave for changing a rotational speed of the driver and for communicating rotational power from the driver to the slave, a clutch mechanism for selectively engaging and disengaging the slave and the driver, and a clutch switching mechanism for controlling the operation of the clutch. The clutch switching mechanism includes an elongated weight member having a first end and a second end, wherein the second end pivots radially outwardly around the first end in response to centrifugal force created by rotation of the weight member around the hub axle. A control member is operatively coupled to the clutch mechanism and is rotatable about the hub axle between an engaging position for causing the clutch to engage the driver and the slave and a disengaging position for disengaging the driver and the slave. An interlocking member is coupled to the weight member in a position spaced apart from the first end of the weight member toward the second end of the weight member and coupled to the cont…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.