Method for manufacturing curved hollow pipe
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United States of America Patent
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Aug 23, 2016
Grant Date -
Jun 4, 2015
app pub date -
Jan 26, 2012
filing date -
Jan 26, 2012
priority date (Note) -
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Abstract
[Problem] A method for manufacturing a bent hollow pipe is provided, in which even when a three-dimensionally bent pipe is formed, a gap, an uneven thickness, and the like would not occur at contact portions at the ends of both of the flange portions when press work is finished, and thus a pipe having the high quality contact portions can be formed.
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