Plasma torch initiated by short-circuit
US5210392A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1990 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Nov 7, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/3489
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A plasma torch includes two tubular coaxial electrodes, at least one of which is axially movable between an operating position in which the movable electrode is spaced from the other electrode and an initiating position in which the movable electrode is in contact with the other electrode, thus establishing an electric short circuit so as to generate an electric arc upon rupture of the electric short circuit hen the mobile electrode is brought back to its operating position. Each electrode is contained in a support provided with a cooling circuit, through which a cooling fluid circulates. The cooling circuit associated with the movable electrode is provided with a seal which permits the electrode to be moved without creating any leaks in the cooling circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.