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:
Sep. 06, 2005
Filed:
Apr. 25, 2002
Erwin Bayer, Dachau, DE;
Joerg Hoeschele, Meckenbeuren, DE;
Juergen Steinwandel, Uhldingen-Muehlhofen, DE;
Rainer Willneff, Markdorf, DE;
Erwin Bayer, Dachau, DE;
Joerg Hoeschele, Meckenbeuren, DE;
Juergen Steinwandel, Uhldingen-Muehlhofen, DE;
Rainer Willneff, Markdorf, DE;
MTU Aero Engines GmbH, Munich, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
In a process for laser-plasma hybrid welding, to weld work pieces, a laser beam and a plasma jet are brought together in the process region close to the work piece. A free microwave-induced plasma jet is generated by the following process. Microwaves are generated in a high-frequency microwave source, and the microwaves are guided in a hollow waveguide. A process gas is introduced into a microwave-transparent tube, which includes a gas inlet opening and a gas outlet opening, at a pressure p≧1 bar. The process gas is introduced into the microwave-transparent tube through the gas inlet opening in such a manner that it has a tangential flow component. A plasma is generated in the microwave-transparent tube by electrode-free ignition of the process gas, and a plasma jet is generated by introduction of the plasma into the working space through a metallic nozzle arranged at the gas outlet opening of the tube.