Two-wheeled vehicle with hydraulic transmission

Land vehicles – Wheeled – Occupant propelled type

Patent

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Details

180224, 180305, 280260, 417273, 418 29, 418 61R, 418164, B62M 1900

Patent

active

046841431

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.

REFERENCES:
patent: 1370516 (1921-03-01), Carmody
patent: 2471939 (1949-05-01), Davis
patent: 2545315 (1951-03-01), Sproull
patent: 4290621 (1981-09-01), Davey
patent: 4546990 (1985-10-01), Harriger

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