Slide member, refrigerant compressor incorporating slide member, refrigerator and air conditioner
US10704541B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2013 |
| Grant date | Jul 7, 2020 |
| Priority date | — |
| Expiry date | Mar 26, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49281
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A slide member of the present invention is used in a slide unit which is included in a refrigerant compressor for compressing a refrigerant and provided inside a sealed container which reserves lubricating oil therein. The slide member is provided with an oxide coating film on a surface of a base material. The oxide coating film is configured such that (1) when the base material comprises an iron based material, the oxide coating film has a three-layer structure including a first layer comprising Fe2O3, a second layer comprising Fe3O4, and a third layer comprising FeO in this order from an outermost surface, (2) the oxide coating film has a dense structure having minute concave/convex portions with a height difference which falls within a range of 0.01 μm to 0.1 μm, or (3) when the base material comprises the iron based material, the oxide coating film has a three-layer structure in which the three layers comprise the iron oxides and are different in hardness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.