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Priority to ES1968139910UpriorityCriticalpatent/ES139910Y/en
Publication of ES139910UpublicationCriticalpatent/ES139910U/en
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Publication of ES139910YpublicationCriticalpatent/ES139910Y/en
Improved mandrel of variable diameter, characterized in that it has a regulation and fixing system integrated by the following elements arranged coaxially: the blade provided with a blind threaded hole and with a lateral groove; a conical outer clamp bushing and longitudinally open by a slot; a regulating screw, square head and provided with a circular projection as a washer; a plug-cap threaded and whose inner hole widens at one end to serve as housing the circular shoulder of the screw, a transverse hole in the body of the mandrel, serving as a housing a. All parts and has three floors or areas, a lower threaded, another low, unthreaded and finally a conical area to receive the clamp, in the wall of this area there is a hole that houses a small stud which inserts its end into the longitudinal grooves of the conical bushing and the blade. (Machine-translation by Google Translate, not legally binding)
ES1968139910U1968-06-261968-06-26
PERFECTED MANDRINUM WITH VARIABLE DIAMETER.
ExpiredES139910Y
(en)