Two-stroke direct fuel injected marine engine having anodized piston ring grooves
US6425364B1 · kind B1 · utility
3Cited by
19References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2000 |
| Grant date | Jul 30, 2002 |
| Priority date | — |
| Expiry date | Nov 28, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05C2201/021
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A piston for a two-stroke direct fuel injection internal combustion engine coupled to drive a marine propulsion unit is provided. The piston has a generally cylindrical body with one or more grooves formed therein. Each groove defines an opening to receive a respective piston ring. A thermal-protection coating is applied by anodizing the interior of the grooves. The respective region of the piston cylindrical body surrounding the respective groove openings is free of the coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.