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Individual
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Priority to ES0254625ApriorityCriticalpatent/ES254625A3/en
Publication of ES254625A3publicationCriticalpatent/ES254625A3/en
Improvements in the system of threading of thin-walled tubes, joined according to the resulting generatrix, which is characterized by giving the ends of the tube an extension of diameter in which fillets are formed, by pressure of the same material, slightly conical and in which its peripheral maximum level is in the extension of the generatrix of the dilation, having at one end the male thread and in the opposite the female, which can be at several inputs. (Machine-translation by Google Translate, not legally binding)
ES0254625A1959-12-301959-12-30Improvements in the threaded thread pipe system (Machine-translation by Google Translate, not legally binding)
ExpiredES254625A3
(en)