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Individual
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Individual
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Priority to ES0016747UpriorityCriticalpatent/ES16747Y/en
Publication of ES16747UpublicationCriticalpatent/ES16747U/en
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Publication of ES16747YpublicationCriticalpatent/ES16747Y/en
A borer apparatus especially applicable to marble, characterized in that it consists of a tube inside which a coil spring is housed, said tube terminating on its upper part in a handle and having a cylindrical bar provided with a threaded groove at its other end. that ends in a mandrel where the bit is held. (Machine-translation by Google Translate, not legally binding)
ES0016747U1948-02-171948-02-17
Drilling device, especially applicable to marble.
ExpiredES16747Y
(en)
Device for the realization of holes of different diameter to machines for drilling lathes and similar (Machine-translation by Google Translate, not legally binding)