Shaft member for fluid lubrication bearing apparatuses and a method for producing the same
US8387246B2 · kind B2 · utility
1Cited by
30References
3Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 20, 2011 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Apr 20, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49348
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A low-cost shaft member for hydrodynamic bearing apparatuses restores the pressure balance in a thrust bearing gap formed on both axial sides of the flange portion in an early stage. A shaft material integrally having a shaft portion and a flange portion with a through-hole between both end faces of the flange portion is formed in a common forging step. As a result, the through-hole is formed to open to an inner diameter side of the bearing gaps avoiding the thrust bearing gaps formed on both end faces of the flange portion of the shaft member as a finished product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.