Pipe fastening structure
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United States of America Patent
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Apr 14, 2015
Grant Date -
May 26, 2011
app pub date -
Nov 18, 2010
filing date -
Nov 20, 2009
priority date (Note) -
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Abstract
A pipe fastening structure includes an end member attached to an end part of a metal pipe, and a nut for fastening the end member attached to the metal pipe to a counterpart. In the pipe fastening structure, the end member has a first spherical part to be brought into contact with a sealing surface of the counterpart, a second spherical part formed integrally with the first spherical part so as to be in contact with a sliding surface formed in the nut, and a neck continuous with the second spherical part and having the shape of a straight pipe.
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