Plasma arc torch with secondary starting circuit and electrode
US9288887B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2012 |
| Grant date | Mar 15, 2016 |
| Priority date | — |
| Expiry date | Sep 17, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/3452
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A plasma arc torch includes an electrode, a tip, a third element, and a secondary power circuit. The electrode is disposed within the plasma arc torch and adapted for electrical connection to a cathodic side of a power supply. The tip is positioned distally from the electrode and adapted for electrical connection to an anodic side of the power supply during piloting. A plasma chamber is formed between the electrode and the tip. The third element is disposed near a proximal end of the plasma chamber. The secondary power circuit is disposed proximate the plasma arc torch and in electrical communication with the third element. The secondary power circuit is configured to generate a high voltage pulse on the third element using input to secondary power circuit to initiate a first arc to start the plasma arc torch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.