Plasma torch and a method of producing a plasma
US4275287A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 21, 1979 |
| Grant date | Jun 23, 1981 |
| Priority date | — |
| Expiry date | Mar 21, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/3478
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A plasma torch includes an annular cathode having an annular peripheral edge from which an arc is discharged. A pair of annular nozzle elements are coaxially disposed on the opposite sides of the cathode. Each nozzle element has an annular edge hanging over the annular peripheral edge of the cathode, and the annular edges of the nozzle elements define therebetween an annular outlet opening for the torch. Gas is introduced between the cathode and the nozzle elements and emitted through the annular outlet opening in a plasma jet. A magnetic field is developed across the annular outlet opening to cause the plasma jet to rotate along the annular peripheral edge of the cathode for its uniform emission from the entire perimeter of the annular outlet opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.