Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
April 12, 2011
Patent Application Number
11197522
Date Filed
August 5, 2005
Patent Primary Examiner
Patent abstract
A ball circulating member constructed in an external face of a nut is provided with ball scooping sections for scooping up balls rolling on between ball screw grooves of a screw shaft and the nut, along a line tangent to a center orbital circle of the balls. The path length of a ball scooping path section formed in the ball scooping sections is set to be ½ or greater of the diameter of the ball.
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