Plasma torches
US4611108A · kind A · utility
71Cited by
4References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1983 |
| Grant date | Sep 9, 1986 |
| Priority date | — |
| Expiry date | Sep 12, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/49157
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In an improved plasma torch, a metal tube delivers a plasma-generating gas to an end discharge outlet. The delivery tube is excited by microwave energy by means of a waveguide of rectangular cross-section. The tube traverses the waveguide through openings of larger diameter than the delivery tube. Metal sleeves are advantageously provided around the tube on each side of the waveguide. Two gases can be delivered to the plasma within concentric tubes. The plasma-formation zone can be moved further away from the waveguide by providing lateral impedance-matching devices along the sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.