The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 08, 2005
Filed:
Apr. 29, 2003
Gabriel E. Carcagno, Campana, AR;
Giuseppe Della Pina, Treviolo, IT;
Rita G. Toscano, Buenos Aires, AR;
Tommaso Coppola, Rome, IT;
Gabriel E. Carcagno, Campana, AR;
Giuseppe Della Pina, Treviolo, IT;
Rita G. Toscano, Buenos Aires, AR;
Tommaso Coppola, Rome, IT;
Tenaris Connections B.V., Amsterdam, NL;
Abstract
Threaded joint for pipes consisting of a male member () and a female member (), which are provided on the outer and inner surfaces respectively with two threading portions presenting a lead-in flank β such that 10°≦β≦25°, an abutment surface () being present at the end of said male member for abutment to a corresponding annular abutment surface () of the female member. The lead-in flanks of the male () and the female () members, upon make-up and with unloaded joint leave a gap (in the direction parallel to the axis () of the joint) varying from 0.01 to 0.12 mm. The internal and external diameters Dand D(of the pipe portion not involved in the coupling with the female member) of said male member, the inner and outer diameters Dand Dof the abutment surface of the female member are linked by the relationship: (D−D)/(D−D)≧0.5.