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Individual
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Individual
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Priority to ES473573ApriorityCriticalpatent/ES473573A1/en
Publication of ES473573A1publicationCriticalpatent/ES473573A1/en
Improvements in concrete piles, threaded, characterized because the pile comprises; a) a metal upper portion that provides a coupling for the application, at the same time, of a rotating driving force, b) a reinforcing metal core coupled in a single piece with said upper portion and c) a cement or similar body shaped in a manner generally conical and cast around said core, said body having an outer surface provided with threads or spiral fillets spaced substantially equally along its entire length. (Machine-translation by Google Translate, not legally binding)
ES473573A1978-09-011978-09-01Improvements in concrete pilots and corresponding method. (Machine-translation by Google Translate, not legally binding)
ExpiredES473573A1
(en)