Manually driven bicycle
US4858942A · kind A · utility
Inventor
Key dates
| Filing date | Aug 12, 1988 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | Aug 12, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62K19/00
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A bicycle has both manual drive and pedal drive assemblies which may be operated simultaneously or independently. The manual drive assembly is connected to the front wheel and the pedal drive assembly is connected to the rear wheel. Both the manual and pedal drive assemblies incorporate chain drive mechanisms as well as crank assemblies. The manual crank assembly is mounted at the top of the front fork journal and also serves as a handlebar assembly for steering the bicycle. In order to provide sufficient clearance between the chain which extends alongside the front forks and the frame, the frame is bent laterally (just behind the steering sleeve) to accommodate the chain during steering movements. In a first embodiment, the frame member extends generally downwardly and rearwardly from the steering sleeve to a sufficient degree to provide sufficient clearance between the crank assembly to allow the bicycle to be steered while the front wheel is being manually driven. In a second embodiment, the horizontal frame crossmember is bent downwardly to a sufficient degree to provide sufficient clearance between the crank assembly to allow the bicycle to be steered while the front wheel is …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.