Lubrication of a planetary gearset
US7967712B2 · kind B2 · utility
8Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2007 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Mar 15, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19995
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a planetary gearset and an automatic transmission according to the invention, a pinion shaft on which a pinion gear is rotatably supported includes a bearing portion on which a bearing is attached and a polygonal portion having a polygonal outer periphery. An axial oil passage and radial oil passages that communicate with the axial oil passage are formed in the polygonal portion, and the inlet of each radial oil passage formed in the pinion gear faces the polygonal portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.