Method of treating surfaces of rotors of the screw type rotary machine
US5223052A · kind A · utility
13Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1991 |
| Grant date | Jun 29, 1993 |
| Priority date | — |
| Expiry date | Apr 3, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12944
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method treating a surface of rotors in a screw-type rotary fluid machine, with the method comprising the steps of: conducting a non-electrolytic Ni plating on the surface of each rotor so as to form a first layer of non-electrolytic Ni plating layer; heating the rotor having the first layer at a temperature not lower than 500.degree. C.; and forming, at least, a second layer of an organic resin so as to cover the first layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.