Plasma gas distributor with integral metering and flow passageways
US7126080B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2005 |
| Grant date | Oct 24, 2006 |
| Priority date | — |
| Expiry date | Jul 7, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/3468
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A gas distributor for use in a plasma arc torch is provided that has at least one plasma gas passageway formed conjointly with a metering passageway, and at least one helical gas passageway formed along an interior portion of the gas distributor, wherein the helical gas passageway is in fluid communication with the plasma gas passageway and the metering passageway. The combination of the metering passageway and the helical gas passageway provides for a metered flow rate and a controlled swirling flow of plasma gas within the plasma arc chamber, respectively, which functions to reduce the amount of molten emissive insert that is ejected from within an electrode at arc shut off, thereby resulting in an increased life of the consumable electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.