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Priority to ES0075143UpriorityCriticalpatent/ES75143Y/en
Publication of ES75143UpublicationCriticalpatent/ES75143U/en
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Publication of ES75143YpublicationCriticalpatent/ES75143Y/en
A hand-operated tube threading machine, essentially characterized by the circumstance of being composed of a self-centering clamp, in which the tube to be screwed is fixed and of a head with a plate to be screwed, in which the corresponding combs are placed, dish that is rotated by hand by means of a crank, but with the decisive circumstance that to increase or decrease the working speed of the head there are three points of drive or force transmission by means of said crank. (Machine-translation by Google Translate, not legally binding)