Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
August 4, 2015
0Patent Application Number
137888550
Date Filed
March 7, 2013
0Patent Citations Received
Patent Primary Examiner
Patent abstract
An outer circumferential groove filled with a seal material and an opposing surface portion are provided to a fit portion of a case. A tray portion opposing the opposing surface portion and an outer circumferential protruding portion entering the outer circumferential groove are provided to the fit portion of a cover. Master dimensions are set so that an outer clearance A0 between the outer circumferential groove and the outer circumferential protruding portion is always larger than an inner clearance C0 between the former and the latter when center positions of the cover and the case coincide with each other.
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