Method of forming internal strictures in a tubular member and a bonding connection with an inserted tube
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United States of America Patent
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Apr 20, 1993
Grant Date -
N/A
app pub date -
Dec 13, 1990
filing date -
Dec 13, 1990
priority date (Note) -
Expired
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Abstract
A leak-resistant connection between two generally tubular members in which second tubular member is telescopically received in a first generally tubular member. There is at least one integral continuous annular stricture formed in the lumen of the first tubular member for engaging and sealing with the second tubular member. A second, integral stricture of larger profile may be provided as a stop to abut the end of the second tubular member. A method of making the connection is also disclosed. The method includes the step of forming the strictures in the tubular member by inserting a grooved mandril into the lumen of the tubular member and heating and applying pressure to the tubular member to form the strictures in the grooves in the mandril. The tubular member can be conveniently heated with RF energy applied through the mandril.
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