Water cooling plasma arc working apparatus
US4916283A · kind A · utility
6Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1989 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Apr 24, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/36
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A plasma arc working apparatus of water cooling type provides a circulation system for circulating cooling water through a circulation passage in order to cool a working plasma arc torch and an introduction device for introducing pressurized gas into the circulation passage in order to drain the cooling water remaining in the circulation passage forcibly therefrom when the power switch for supplying electric power to the working apparatus is switched off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.