Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 3, 2019
Patent Application Number
15762220
Date Filed
October 4, 2016
Patent Citations Received
Patent Primary Examiner
Patent abstract
The cross-sectional shape of a valve hole is an elongated shape having a long axis and a short axis, and has left and right hole side walls that are parallel to each other, a first hole end wall that connects one ends of the left and right hole side walls, and a second hole end wall that connects the other ends of the left and right hole side walls, and the cross-sectional shape of land portions of a spool is an elongated shape having a long axis and a short axis, and has left and right land side walls that are parallel to each other, a first land end wall that connects one ends of the left and right land side walls, and a second land end wall that connects the other ends of the left and right land side walls.
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