Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takayasu Takubo0
Isao Hirai0
Kazuhiko Yoshida0
Date of Patent
August 17, 2010
0Patent Application Number
105921120
Date Filed
March 3, 2005
0Patent Primary Examiner
Patent abstract
A hub ring and/or an outer ring constituting a bearing device for a wheel, which is formed of a steel which contains 0.45 to 0.70 mass % of C and at least one of V, Nb and Ti in a total amount of 0.3 mass % or less, wherein a micro structure of a part being not surface-hardening-treated contains a ferrite in 15 to 30 area % and contains a particulate ferrite.
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