The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 2009
Filed:
Feb. 25, 2005
Applicant:
Masato Kato, Gunma, JP;
Inventor:
Masato Kato, Gunma, JP;
Assignees:
NSK Ltd., Tokyo, JP;
NSK Precision Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H 1/24 (2006.01); F16H 55/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A ball screw includes a screw shaft, a nutscrewed to the screw shaftvia ballsrollably charged to a ball rolling pathin a spiral shape, a ball return pathfor circulating the ballby delivering the ballfrom an end point to a start point of the ball rolling path, and ball guide memberfor guiding the ballbetween the ball rolling pathand the ball return path. The ball guide memberis fitted to a recess portionprovided at an end face of the nut. An outer edge portionof a fixing memberis inserted into a groove portionformed at an inner face of the recess portion, so that the fixing memberfixes the ball guide memberto the nut