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Priority to ES118569UpriorityCriticalpatent/ES118569Y/en
Publication of ES118569UpublicationCriticalpatent/ES118569U/en
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Publication of ES118569YpublicationCriticalpatent/ES118569Y/en
Improved extendable toothed wheel comprising toothed elements mounted radially on a disc and longitudinally displaceable on which rest other intermediate toothed elements supported by a rod housed in corresponding intermediate projections of the support disc characterized in that at the inner end of said stem of the intermediate element is coaxially mounted a spring with one end of which rests against the internal face of the support protrusion and the other against a washer fixed by a pin so that the expansive action of said spring is exerted in the direction of displacement centripetally the intermediate toothed element determining by the support of these in the collateral radial elements the displacement of said elements. (Machine-translation by Google Translate, not legally binding)