Hydraulic drive system for bicycles and the like

Details Hydraulic drive system for bicycles and the like Hydraulic drive system for bicycles and the like

1993-07-20

1995-02-07

Rice, Kenneth R.

Land vehicles

Wheeled

Occupant propelled type

417273, B62M 1900

Patent

active

053870000

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.

REFERENCES:
patent: 3850448 (1974-11-01), Stewart
patent: 4313714 (1982-02-01), Kubeczka
patent: 4546990 (1985-10-01), Harriger
patent: 4684143 (1987-08-01), Sato
patent: 4688815 (1987-08-01), Smith
patent: 4975025 (1990-12-01), Yamamura et al.
patent: 5281104 (1994-01-01), Bublitz

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