Laser barrier material and method of laser drilling
US5049722A · kind A · utility
24Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1990 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Sep 14, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K26/389
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
PTFE-loaded wax is used in the laser drilling of holes in hollow turbine blades to prevent strike-through of the beam to an opposite wall of a cavity in the blade. The PTFE-loaded wax is poured or injected in molten form into the cavity prior to laser-drilling, and is subsequently removed by steaming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.