Piston ring
US10689743B2 · kind B2 · utility
2Cited by
4References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 10, 2016 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | Mar 27, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J9/26
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A piston ring is provided with a thermal spray coating that contains tungsten carbide and chrome carbide as a hard phase, and contains nickel as a metallic binder phase, and is characterized in that the thermal spray coating is formed by the spraying of a thermal spray powder that has been produced by means of a granulation sintering method, and that contains hard particles in which the mean particle diameter of the tungsten carbide has been adjusted by means of a BET method to fall within a range of not less than 0.15 μm and not more than 0.45 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.