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Individual
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Individual
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Priority to ES0257557ApriorityCriticalpatent/ES257557A1/en
Publication of ES257557A1publicationCriticalpatent/ES257557A1/en
Improvements in the manufacture of prestressed channels, characterized because on the cement tube or metal plate of the desired length, wires are applied by an anchorage at each end, proceeding to the tensioning of the same by means of a dynamometer, until obtaining the required tension proceeding then to the injection of cement mortar with gummy paste mixture until obtaining the desired thickness. (Machine-translation by Google Translate, not legally binding)
ES0257557A1960-04-231960-04-23Improvements in the manufacture of pretensed channels (Machine-translation by Google Translate, not legally binding)
ExpiredES257557A1
(en)
Improvements introduced in the manufacture of pretension tendons for the pretension of concrete (Machine-translation by Google Translate, not legally binding)