MANUFACTURING METHOD, A MANUFACTURING DEVICE AND A PRODUCT OF A LEAD-IN TYPE INTERFERENCE FIT PIPELINE EXTERNAL THREAD
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United States of America Patent
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Issued Date -
May 12, 2011
app pub date -
Jun 29, 2009
filing date -
Jun 27, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The disclosure relates to a lead-in type interference fit pipeline external thread which can be sealed without packing, a useful thread thereof is a taper pipe thread, there are at least two turns of complete variation convex threads in the full length of the useful thread, a pitch diameter of the variation convex thread is larger than a corresponding reference standard taper thread by a predetermined interference fit amount, a flank of the variation convex thread is a convex arc surface. The disclosure also relates to a manufacturing method, a manufacturing device of the lead-in type interference fit pipeline external thread and a pipe product with the lead-in type interference fit pipe thread pair.
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