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Individual
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Individual
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Priority to ES0053870UpriorityCriticalpatent/ES53870U/en
Publication of ES53870UpublicationCriticalpatent/ES53870U/en
A change of speed by chain derailment for bicycles and the like, characterized by comprising two support and tension pulleys respectively, located in vertical position and facing each other, mounted on corresponding axes of rotation. These pulleys in its periphery have a smaller width than in the disc. (Machine-translation by Google Translate, not legally binding)
ES0053870U1956-04-241956-04-24A change of speed by chain derailment for bicycles (Machine-translation by Google Translate, not legally binding)
PendingES53870U
(en)