Abrasivejet nozzle assembly for small hole drilling and thin kerf cutting
US4951429A · kind A · utility
47Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Apr 7, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24C5/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An abrasivejet nozzle assembly is disclosed which is particularly suitable for drilling small diameter holes in a workpiece. Such assemblies include a mixing region wherein abrasive particles are entrained into a high velocity waterjet formed as high pressure water is forced through a jet-forming orifice. Among the unique features of the nozzle assembly are an inwardly tapered abrasive path just upstream of the mixing region, flushing conduits immediately upstream and downstream of the mixing region, and a venting passageway upstream of the mixing region which prevents the backflow of abrasive dust towards the jet-forming orifice.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.