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:
Nov. 09, 2004
Filed:
Jun. 10, 2003
Applicant:
Inventors:
Francis Briand, Paris, FR;
Karim Chouf, Epinay s/seine, FR;
Philippe Lefebvre, Saint Ouen I'Aumône, FR;
Eric Verna, Boissy I'Aillerie, FR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K 2/612 ; B23K 2/632 ;
U.S. Cl.
CPC ...
B23K 2/612 ; B23K 2/632 ;
Abstract
Method of welding tailored blanks consisting of a material mostly containing steel and a proportion greater than 0.015% aluminium by weight, using at least one laser beam, in which at least one weld joint of the full-penetration type is made using a gas mixture consisting of 30% to 80% nitrogen by volume, the rest being helium (up to 100%) in order to assist the said laser beam. The method of the invention is particularly recommended for welding motor vehicle elements, especially bodywork, doors, bonnets or the like.