Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Universal Oil Products Co
Original Assignee
Universal Oil Products Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Universal Oil Products CofiledCriticalUniversal Oil Products Co
Priority to ES386448ApriorityCriticalpatent/ES386448A1/en
Publication of ES386448A1publicationCriticalpatent/ES386448A1/en
A corrugated flexible tube, composed of helically wound filaments or continuous fibers embedded in a plastic, and having ridges extending transversely around the outer wall of the tube, and grooves, corresponding to said ridges, extending transversely in the wall inside said tube whereby said ridges and said grooves have a corresponding longitudinal arrangement and extend radially outwardly from the geometrical axis of the tube. (Machine-translation by Google Translate, not legally binding)
ES386448A1970-12-141970-12-14A corrugated flexible tube. (Machine-translation by Google Translate, not legally binding)
ExpiredES386448A1
(en)
Improvements in a method and apparatus for manufacturing a transversely grooved thermoplastic tube with a smooth inner wall and a tube when made by this method