Liquid cooled plasma arc torch system and method for replacing a torch in such system
US5635088A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1995 |
| Grant date | Jun 3, 1997 |
| Priority date | — |
| Expiry date | Jan 4, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/3457
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A liquid cooled plasma arc cutting torch system includes a plasma arc torch, a torch receptacle and a cooling system. The torch is removably mounted to the receptacle. The cooling system includes a liquid storage tank, supply and return lines providing fluid communication paths between the tank and the receptacle and a pump for pumping the cooling liquid from the tank through the supply line, the receptacle, the torch and the return line. A valve coupled to the return line includes a nozzle that directs liquid toward an inside top surface of the tank. A flow restriction member may be provided to equalize pressure in the supply with atmospheric pressure when the pump is not operating. A pressurized gas source may be utilized to substantially clear the receptacle, torch and return line of liquid when the pump is not operating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.