Piston assembly with cooling lubricant reservoir defining member with a deep narrow reservoir and a shallow wide reservoir
US4505233A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1984 |
| Grant date | Mar 19, 1985 |
| Priority date | — |
| Expiry date | Jun 25, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05C2201/0448
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A piston assembly for an internal combustion engine is made up from a piston main body and a lubricant reservoir defining member. The piston main body has a cup shaped structure including a crown portion and a hollow cylindrical wall portion joining thereto. The lubricant reservoir defining member includes a shelf plate main body portion formed with first and second depressions which define first and second lubricant reservoirs, and is securely mounted within the cup shaped piston structure with the shelf plate portion generally to and opposing the piston crown. The ratio of the surface area of the first lubricant reservoir to the surface area of the second lubricant reservoir is less than the ratio of the volume of the first lubricant reservoir to the volume of the second lubricant reservoir. Lubricant is supplied more towards the first lubricant reservoir and is drained more from the second reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.