Hydraulic drive system for bicycles and the like
US5387000A · kind A · utility
Inventor
Key dates
| Filing date | Jul 20, 1993 |
| Grant date | Feb 7, 1995 |
| Priority date | — |
| Expiry date | Jul 20, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62M19/00
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hydraulic drive system for bicycles and the like comprises a casing adapted for enclosing a hanger portion of the bicycle, planetary gear type speed up gears including a carrier integral with a crankshaft for increasing the number of rotations of the crankshaft, an eccentric cam assembly including an outer eccentric cam and an inner eccentric driven by a sun gear of the speed up gears and a variable displacement hydraulic pump having plungers driven by the cam assembly and provided at an input portion of the driving system, the speed up gears, the eccentric cam assembly and the variable displacement hydraulic pump being housed in the casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.