Plasma torch with electrode wear detection system
US8633415B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 2012 |
| Grant date | Jan 21, 2014 |
| Priority date | — |
| Expiry date | Jul 30, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/3494
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A plasma arc torch is provided that includes a wear stop designed to detect wear of an electrode and prevent the use of the electrode once the electrode has experienced a certain amount of wear. Either the electrode or the nozzle is movable with respect to the main torch body, and the movable component defines a projection. The wear stop is positioned a predetermined distance from a nozzle of the torch, such that prior to experiencing an excessive amount of wear, the electrode is able to contact the nozzle and initiate a pilot arc for starting a torch operation. Once the length of the electrode becomes shorter than a predetermined length due to wear, the projection of the electrode engages the wear stop, and the wear stop prevents the electrode from contacting the nozzle. In this way, an electrode that is excessively worn cannot be used in subsequent torch operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.