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. 03, 2006
Filed:
Mar. 06, 2002
Erwin Bayer, Dachau, DE;
Philip Betz, Maulbronn, DE;
Joerg Hoeschele, Meckenbeuren-Brochenzell, DE;
Friedrich Oeffinger, Stuttgart, DE;
Juergen Steinwandel, Uhldingen-Muehlhofen, DE;
Erwin Bayer, Dachau, DE;
Philip Betz, Maulbronn, DE;
Joerg Hoeschele, Meckenbeuren-Brochenzell, DE;
Friedrich Oeffinger, Stuttgart, DE;
Juergen Steinwandel, Uhldingen-Muehlhofen, DE;
MTU Aero Engines GmbH, Munich, DE;
Abstract
The invention relates to a method and an apparatus for plasma welding. A free microwave-induced plasma jet is generated by the following steps. Microwaves are generated in a high-frequency microwave source. The microwaves are guided in a wave guide. A process gas is introduced at a pressure of p≧1 bar into a microwave-transparent tube, which comprises a gas inlet opening and a gas outlet opening, the process gas being introduced through the gas inlet opening into the microwave-transparent tube in such a way that it has a tangential flow component. A plasma is generated in the microwave-transparent tube by electrodeless ignition of the process gas. The plasma jet is produced by the introduction of the plasma into a working space through a metallic expansion nozzle arranged at the gas outlet opening of the tube.