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:
Aug. 18, 1987
Filed:
Apr. 02, 1986
Applicant:
Inventors:
Jacques Nicolas, Bondues, FR;
Gilbert Degrande, Hem, FR;
Assignee:
Stein Industrie, Velizy Villacoublay, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ; B21D / ;
U.S. Cl.
CPC ...
72 13 ; 72128 ; 72369 ;
Abstract
A method and apparatus for bending thick metal tubes is disclosed and is characterized in that thermal insulation is disposed inside the heated zone of the tube being bent, and that the thickness of said thermal insulation is great enough to considerably reduce the temperature gradient between the inside and outside surfaces of the tube in said heated zone.