Patent · US Active

Threaded connection with improved root thread profile

US8668232B2 · kind B2 · utility

13Cited by

20References

31Claims

0Family size

Assignee

Tenaris Connections Limited · VC

Inventors

Gaston Mauro Mazzaferro · Olavarría, AR
Tommaso Coppola · Roma, IT
Stefano Amato · Roma, IT
Ramón Alberto Aguilar Armendariz · Las Cruces, US
Philippe Pierre Darcis · Veracruz, MX

Key dates

Filing date	Dec 9, 2011
Grant date	Mar 11, 2014
Priority date	—
Expiry date	Mar 6, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/03
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A threaded connection design having a double ellipse in the thread root for reducing stress fatigue is illustrated in this disclosure. The root groove includes a first portion comprising a first elliptical surface being part of a first ellipse. The root groove further includes a second portion comprising a second elliptical surface, being part of a second ellipse, and the second elliptical surface being joined tangentially at a first end to the first elliptical surface at a junction point that defines the bottom of the root groove. The second elliptical surface is joined tangentially at a second end to the load flank.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.