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:
Jan. 16, 1979
Filed:
Jun. 21, 1977
Applicant:
Inventors:
Georges Le Huede, Champagne sur Seine, FR;
Guy Zacharie, Fontainebleau, FR;
Assignee:
Electricite de France, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72370 ; 291574 ;
Abstract
A tube which has been expanded in a support such as the tube-sheet of a heat exchanger is subjected to diametral deformation of controlled intensity and direction in the transition zone between the expanded portion of the tube and the portion which has a nominal diameter by means of an axially displaceable and radially expandable tool having a bullet-nosed shape or by means of a tube-expander of the type comprising a mandrel fitted with rollers or by means of a fluid under pressure.