External sleeve assisted tube bending
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United States of America Patent
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Feb 6, 2007
Grant Date -
Oct 27, 2005
app pub date -
Apr 22, 2004
filing date -
Apr 22, 2004
priority date (Note) -
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Abstract
A method and apparatus for bending tubes particularly suited for bending thin-walled tubing into a tight radius bend. An external sleeve is used during the bending process which maintains the tube cross sectional area and tube wall thickness, thereby eliminating the need for a wiper die or an internal mandrel. In one embodiment the sleeve is split along its longitudinal axis.
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