Patent · US Expired

Method and apparatus for plasma welding with low jet angle divergence

US6982395B2 · kind B2 · utility

2Cited by

9References

14Claims

0Family size

Assignee

MTU Aero Engines AG · DE

Inventors

Erwin Bayer · Dachau, DE
Philip Betz · Maulbronn, DE
Joerg Hoeschele · Stuttgart, DE
Friedrich Oeffinger · Stuttgart, DE
Juergen Steinwandel · Überlingen, DE

Key dates

Filing date	Mar 6, 2002
Grant date	Jan 3, 2006
Priority date	—
Expiry date	Apr 19, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH05H1/3484
WIPO fieldChemical engineering
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.