US Patent 7921743 Ball screw device
Patent 7921743 was granted and assigned to NSK Ltd. on April, 2011 by the United States Patent and Trademark Office.
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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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US Patent 07921743 Ball screw device US Patent 7921743 Ball screw device
Infobox
Patent Number
0792174300
Patent Number
792174300
Edits on 6 Apr, 2023
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
079217430
Date of Patent
April 12, 2011
0Patent Application Number
111975220
Date Filed
August 5, 2005
0Official Website
Patent Primary Examiner
Edits on 23 Sep, 2022
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
079217430
Date of Patent
April 12, 2011
0Patent Application Number
111975220
Date Filed
August 5, 2005
0Official Website
Patent Primary Examiner
Edits on 19 Jun, 2022
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US Patent 07921743 Ball screw device
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07921743
Date of patent
April 12, 2011
Patent application number
11197522
Date Filed
August 5, 2005
Patent primary examiner
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