Oil drain passage structure of cylinder block and core structure thereof
US7225786B2 · kind B2 · utility
9Cited by
7References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 8, 2005 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Dec 8, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02F7/0007
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides an apparatus for achieving precise manufacturing of drain passages such as those used for oil return and blow-by gas discharge in a cylinder block. Grid-like oil drain passage and corresponding core structures are disclosed herein; the oil drain passage structure comprises a plurality of vertical passages that are arranged longitudinally with respect to the cylinder block, wherein the vertical passages are interconnected by a connecting passage that runs longitudinally through the central portions of the vertical passages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.