Apex seals for rotary piston engines
US4125399A · kind A · utility
3Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1977 |
| Grant date | Nov 14, 1978 |
| Priority date | — |
| Expiry date | Aug 26, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C37/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Apex seal for rotary piston engines made of an iron-based material containing in weight 2.5 to 4.0% of C, 0.5 to 2.8% of Si, less than 1.0% of Mn, 0.25 to 2.0% of Ni, 0.25 to 2.0% of Mo, 0.25 to 2.0% of Cu, 0.15 to 0.4% of B, 0.15 to 1.5% of Cr, 0.1 - 0.4% of V and the balance of substantially iron. The material is of a chilled structure which is produced when the material is casted without any specific cooling. The apex seal provides remarkably improved wear and impact resistant properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.