Water jet mixing tubes used in water jet cutting devices and method of preparation thereof
US5363556A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1993 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Jul 30, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49822
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An improved two membered substantially crack-free water jet mixing tube of an abrasive water jet cutting device and a method of its preparation. The method comprises chemically vapor depositing diamond layer on a funnel shaped support member to form an inner member of the mixing tube, separating the inner member from the support member, depositing and then cooling an outer member on the outer side of the inner member to produce a compressive stress on the inner member that substantially prevents formation cracks on the inner member. The inner side of the inner member has a smooth bore having a microcrystalline structure and the outer member has a higher coefficient of thermal expansion than diamond. The invention is also directed to a water jet cutting device that incorporates the aforementioned improved substantially crack-free water jet mixing tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.