Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
April 17, 2007
Patent Application Number
11011922
Date Filed
December 14, 2004
Patent Primary Examiner
Patent abstract
In a rotary damper, an outer lid is attached to an outer side surface of a casing. A first oil passage and a second oil passage are in respective communication. A first oil chamber and a second oil chamber are provided in parallel between the outer side surface of the casing and the inner side surface of the outer lid. A first check valve is provided in the first oil passage, a second check valve is provided in the second oil passage, and an orifice plate is movably provided so as to face both the first oil passage and the second oil passage.
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