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:
Jun. 23, 1987
Filed:
Mar. 18, 1985
Applicant:
Inventor:
Raymond Baillet, Gueugnon, FR;
Assignee:
Ugine Gueugnon S.A., Gueugnon, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
138148 ; 138151 ; 2945 / ;
Abstract
The double-wall welded tube has two portions of the tube, in the region of which the weld (10) is located, which are each defined by the outer surface of a fold (6, 7) formed by the material constituting, in this region, the double wall of the tube. In this way, the regin in which the weld is effected is perfectly homogeneous and the weld can therefore be of very high quality.