Piston for an internal combustion engine
US7152567B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2003 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | Nov 27, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J1/16
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to a piston for an internal combustion engine comprising piston-pin bores, into which lubrication grooves that run around the nadir and equator zones of said bores are machined. The aim of the invention, is to simplify the production of the piston-pin bores provided with said lubrication grooves. To achieve this, each of the lubrication grooves has a central region, whose groove base has a depth of less than 100 μm. Said central region is flanked by groove areas facing towards the interior and exterior of the piston. The bases of said grooves are inclined towards the longitudinal axis, each forming an acute angle with the longitudinal axis of the piston-pin bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.