Underwater welding apparatus and underwater welding method
US10052717B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2012 |
| Grant date | Aug 21, 2018 |
| Priority date | — |
| Expiry date | Aug 19, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K26/1224
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An underwater welding apparatus includes: an underwater welding head provided underwater and having, at its leading end, a nozzle section from which laser light is emitted; a shied cover formed of an elastic member and provided around the nozzle section so as to form, at the leading end of the underwater welding head, a space where water is excluded by shield gas; and an expansion/contraction member having a discharge hole for discharging water and shield gas containing metal dust particles from an inside of the shield cover, the discharge hole being increased in diameter as pressure inside the shield cover rises, while being reduced in diameter as the pressure inside the shield cover falls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.