Laser barrier material
US5140127A · kind A · utility
29Cited by
9References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1991 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Jul 30, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K26/389
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In the laser drilling of a hole through a wall of a gas turbine blade into a cavity within the blade there is provided an injectable PTFE substitute for injection into the cavity before laser drilling. The PTFE substitute prevents strike-through of laser light to the opposite wall of the cavity. The PTFE substitute used is fluorinated ethylene propylene or a copolymer having a PTFE backbone and fully fluorinated alkoxy side groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.