Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
February 23, 2010
Patent Application Number
10500191
Date Filed
December 26, 2002
Patent Citations Received
Patent Primary Examiner
Patent abstract
On a region of a ring-shaped continuous decorative portion 15 formed of tops and bottoms in cross-section, protruding portions 17 higher than the decorative portion 15 and having a predetermined surface area are provided. A joined portion of the decorative portion 15 and each protruding portion 17 or of the protruding portions is set higher than the bottoms of the decorative portion 15, and a rigidity difference between the protruding portions 17 and the decorative portion 15 is resolved, thus restricting an occurrence of a stress concentration.
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