Electrical plasma jet torch and electrode therefor
US4127760A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1976 |
| Grant date | Nov 28, 1978 |
| Priority date | — |
| Expiry date | Mar 15, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/42
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An electrical plasma jet torch has front and back electrodes mounted in a torch body and means for maintaining a high current electric arc between the electrodes. The front electrode is the anode and is formed with a passage that provides a nozzle through which high velocity, high temperature plasma is ejected. The anode includes an improved arrangement of concentric rows of coolant passages extending to the front of the anode. A single annulus formed in the anode provides communication with all passages of the outer row. Passages of both rows are arranged in mutually spaced groups to provide space for a number of powder bores which extend substantially radially through the anode. The powder bores are enlarged to receive a sleeve which is readily replaced when eroded by highly abrasive powders. An annular grooved boss of the front of the anode is received in a groove in a cover plate and sealed thereto by means of O-rings to provide a coolant flow reversing annulus at the front end of the anode. A modified three piece anode has a simple and replaceable arc chamber section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.