Plasma torch with swirling gas flow in a shielding gas passage
US5726414A · kind A · utility
84Cited by
11References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1996 |
| Grant date | Mar 10, 1998 |
| Priority date | — |
| Expiry date | Apr 12, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/3478
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A plasma torch of swirling plasma gas flow type is disclosed in which there are provided an electrode body having a forward end thereof and a nozzle that is arranged to enclose said forward end portion of the electrode and that is spaced therefrom across a plasma gas flow passage, characterized in that at least a portion of the said electrode body at which a pilot arc can be ignited is composed of either of a material that is high in its melting point and a mixture of the said high melting point material with either of a substance that is low in its work function and an oxide of the said substance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.