Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Miyuki Takahashi0
Ryou Abe0
Hidenori Egashira0
Date of Patent
November 25, 2008
0Patent Application Number
117271050
Date Filed
March 23, 2007
0Patent Primary Examiner
Patent abstract
A side face of a pump gear is formed into a stepped face such that an annular region extending radially from a diameter which is smaller than a dedendum circle diameter of the pump gear and larger than the outer diameter of a pump gear bearing to the addendum circle diameter of the pump gear is recessed by a certain depth to increase the side gap in the recessed annular region. Therefore, the side gap in the recessed annular region is larger than a side gap in a region between the diameter smaller than the dedendum circle diameter of the pump gear and larger than the outer diameter of the pump gear bearing to the outer diameter of the pump gear bearing.
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