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:
Dec. 20, 1988
Filed:
Aug. 27, 1987
Applicant:
Inventors:
Didier Grare, Aulnoye-Aymeries, FR;
Herv/e/ Salkin, Aulnoye-Aymeries, FR;
Assignee:
Vallourec, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
73761 ; 73855 ; 7386221 ;
Abstract
A device for determining when a threaded joint for steel tubes having a male element (1) with external threads (3) with a screw limiting stop (5), and a female element (2) with corresponding internal threads (4) and a corresponding screw limiting stop (6) is properly made up is provided. The device comprises a strain gauge (12) and means (10, 11) for applying said gauge on the external surface of the female element (2) such that the gauge can measure superficial deformations of the female element (2) in the longitudinal direction along one of the generatrix of the female element.