Variable gear ratio chain drive system for bicycles

A finite range infinitely variable gear ratio chain drive system incorporates a drive sprocket assembly having a plurality of radially displaceable sprocket gears. Each of the sprocket gears is mounted upon a shaft extending intermediate two spaced apart plates. Each shaft has a unique degree of rad...

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Bibliographische Detailangaben
Hauptverfasser:	ERICKSON, MARLO W. V, VOLK, STANLEY W
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CYCLES ENGINEERING ELEMENTS AND UNITS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS POWERED PROPULSION OF SLEDGES OR RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES THERMAL INSULATION IN GENERAL TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A finite range infinitely variable gear ratio chain drive system incorporates a drive sprocket assembly having a plurality of radially displaceable sprocket gears. Each of the sprocket gears is mounted upon a shaft extending intermediate two spaced apart plates. Each shaft has a unique degree of radial displacement and twist intermediate the plates which are, respectively, commensurate with the finite range of effective diametric excursion and resulting change in effective circumference of the drive sprocket assembly. The effective diameter of the drive sprocket assembly is variable by translating the drive sprocket intermediate the fixed plates and forcing the sprocket gears to extend to contract radially along their respective shafts.