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Priority to ES1971169896UpriorityCriticalpatent/ES169896Y/en
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Mixed piping for the transport of pressurized fluids, which is essentially characterized by being constituted by an internal plastic tube, acting as a sealed element, surrounded by another of reinforced or prestressed concrete, as a resistant element, which in turn is covered by another tube also of plastic nature, which assumes the external impermeability, all this so that the internal tube protrudes a certain measure at both ends. (Machine-translation by Google Translate, not legally binding)
ES1971169896U1971-06-141971-06-14
MIXED PIPE FOR TRANSPORTATION OF PRESSURE FLUIDS.
ExpiredES169896Y
(en)
Improvements in the proportional hydraulic closure quick gasket systems for concrete pipe. (Machine-translation by Google Translate, not legally binding)
Machine producing mechanical energy through the pressure of fluids, both liquids and gaseous. (Machine-translation by Google Translate, not legally binding)