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Individual
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Individual
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Priority to ES83698UpriorityCriticalpatent/ES83698Y/en
Publication of ES83698UpublicationCriticalpatent/ES83698U/en
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Publication of ES83698YpublicationCriticalpatent/ES83698Y/en
A device for changing the chain of transmission for bicycles with a central gear of several speed ratios, characterized in that it is mounted completely to the right of the central tube of the frame and is constituted by two oscillating levers that form with a union collar to the tube and with a diverting fork an articulated parallelogram subordinated at the same time to a control cable and to a recovery spring means. (Machine-translation by Google Translate, not legally binding)
Device coupled to a special bicycle frame by which, without the need for change of speeds and by means of a grader, the effort of the cyclist is reduced. (Machine-translation by Google Translate, not legally binding)