Two-wheeled vehicle with hydraulic transmission
US4684143A · kind A · utility
Inventor
Key dates
| Filing date | Mar 27, 1986 |
| Grant date | Aug 4, 1987 |
| Priority date | — |
| Expiry date | Mar 27, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62M19/00
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A two-wheeled vehicle such as a bicycle includes a variable displacement fluid pump such as a radial plunger pump provided at a crankshaft of pedals and a fixed displacement fluid motor such as a gear motor at a rear wheel or a front wheel. The fluid pump and motor are connected through hydraulic passages. Plungers of the radial plunger pump are driven by a cam assembly whose eccentricity is adjustable by means of an eccentricity control means dependent upon the load acting upon the vehicle in a stepless manner, so that the speed of the vehicle can be changed in a stepless manner. Moreover, the vehicle includes automatic speed change means which automatically change the eccentricity of the eccentric cam assembly according to hydraulic pressure of the variable displacement fluid pump, so that the speed of the vehicle can be automatically changed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.