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ZELTNER OLAF
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ZELTNER OLAF
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Application filed by ZELTNER OLAFfiledCriticalZELTNER OLAF
Priority to ES1977228238UpriorityCriticalpatent/ES228238Y/en
Publication of ES228238UpublicationCriticalpatent/ES228238U/en
Application grantedgrantedCritical
Publication of ES228238YpublicationCriticalpatent/ES228238Y/en
Expandable shaft, essentially characterized by the fact that it consists of a closed elastic tube, equipped with a valve for inflation and. Deflated, which is located inside a rigid tube that constitutes the shaft itself, on whose tube. Elastic longitudinally slightly arched longitudinal strips are pushed, from which protruding pivots protrude. Outside the rigid tube by respective holes provided therein, topped by work heads that tend to occupy a retracted position and that, when inflating the inner tube, adopt a protruding position in which they rest against the inner side of a tubular reel adjusted around the axis. (Machine-translation by Google Translate, not legally binding)