Tubular threaded joint with trapezoid threads having convex bulged thread surface
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 19, 2008
Grant Date -
Oct 7, 2004
app pub date -
Feb 4, 2002
filing date -
Feb 9, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A threaded tubular connection includes two elements, male and female, made up one into the other to a given torque in which, prior to making up, at least one thread face under contact pressure has a convexly rounded shape that is continuous over its width with a radius of curvature in the range 2 to 60 mm and is in point contact with the corresponding face of the mating element. Such a threaded connection has an increased resistance to breakout or to overtorquing. In one embodiment, the convexly rounded face is a male or female thread flank and one of the male or female threads includes a groove opening into the thread crest to render flexible either the convexly rounded flank or the corresponding flank. Such a geometry can accommodate variations in contact between the flanks.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully