Method to make a curved tubular element in order to convey abrasive materials such as concrete or suchlike, and curved tubular element thus obtained
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United States of America Patent
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Dec 22, 2015
Grant Date -
May 23, 2013
app pub date -
Aug 1, 2011
filing date -
Aug 3, 2010
priority date (Note) -
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Abstract
Method to make a curved tubular element in order to convey abrasive materials such as concrete or suchlike, which comprises a first step of making at least a curved component made of a material highly resistant to wear, having an arched transverse development comprised between 90° and 360°, a second step of inserting the curved component into a shaping mold with a molding surface with a shape mating with the outer surface of at least a part of the curved tubular element to be made, so that, together with the molding surface, the curved component defines a casting chamber, and a third step in which material with a low resistance to wear is cast in the casting chamber in order to make, externally to the curved component, at least a part of a tubular body of the curved tubular element.
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