Bearing device for wheel
US8240922B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2006 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Feb 8, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49679
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A wheel support bearing assembly, which enables an increase in the strength and the fatigue strength of its wheel mounting flange or vehicle body fitting flange against high stress and repeated stress and the suppression of the increase of the number of processes, includes an inner member and an outer member rotatable relative to each other through rolling elements. The flange is formed on the inner member or the outer member. A component part having the flange is a hot-forged product of steel in which a matrix portion is formed as a standard structure and the non-standard structural portion is formed on the surface of the flange. The non-standard structure is formed of either of a fine ferrite/pearlite structure, an upper bainite structure, a lower bainite structure, and a tempered martensite structure, or mixture of two or more of these structures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.