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:
Oct. 02, 1990
Filed:
Jun. 15, 1989
Applicant:
Inventors:
Gilbert Vigneron, Boulogne sur Seine, FR;
Jean Bezier, Croix, FR;
Thong Nguyen-Thanh, Cernay la Ville, FR;
Pierre Vidal, Montigny sur Loing, FR;
Guy Zacharie, Fontainebleau, FR;
Lucien Guillemin, Bagneaux sur Loing, FR;
Assignees:
Societe Anonyme, Villacoublay, FR;
Electricite De France, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ; F28F / ;
U.S. Cl.
CPC ...
428594 ; 29523 ; 29507 ; 2940216 ; 2940219 ; 138 97 ;
Abstract
To repair a corroded region of the end of a heat exchanger tube, a sleeve is inserted, then expanded into the tube both in the area of the tube sheet and beyond the corroded area, then local welds are made in each of the expanded regions. Thereafter, the end of the sleeve is expanded against the tube in a region inside the tube sheet and above the local weld.