Bridge and method for manufacturing the bridge
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United States of America Patent
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Jul 10, 2012
Grant Date -
Jun 10, 2010
app pub date -
Jun 20, 2006
filing date -
Jun 20, 2006
priority date (Note) -
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Abstract
The bridge is constructed of one inner tube and an outer tube surrounding the inner tube. The inner and outer tube are joined to each other by connecting pipes welded to the outer surface of the inner tube and to the inner surface of the outer tube so that the inner tube and the outer tube are connected to each other through said connecting pipes whereby a rigid composite structure is formed. The tubes and pipes are preferably laser welded to each other, preferably by a continuous seam.
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