Flare-shaped end structure for tube
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United States of America Patent
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Oct 13, 2009
Grant Date -
Mar 8, 2007
app pub date -
Jan 25, 2005
filing date -
Jan 28, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A flared end structure formed by processing an end part of a metal tube which is pressed against a seat formed in a member by tightening a coupling nut to the member. The flared end structure has a joining end part to be pressed against the seat of the member, and a curved part continuous with the joining end part. The curved part has an outer surface having a curved area, and a concave inner surface having a bottom edge. The curved area of the outer surface has a radius of curvature smaller than the wall thickness of the metal tube.
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