Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
September 2, 2008
Patent Application Number
11261485
Date Filed
October 31, 2005
Patent Primary Examiner
Patent abstract
A ring gear is an annular gear having an annular base portion with a predetermined constant width, and the annular base portion is provided with a gear on an entire periphery thereof. The base portion includes a first wall thickness portion having a first wall thickness, and a second wall thickness portion having a second wall thickness thicker than the first wall thickness.
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