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:
Apr. 30, 2019
Filed:
Dec. 25, 2015
Applicant:
Thk Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
THK CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 25/22 (2006.01);
U.S. Cl.
CPC ...
F16H 25/2223 (2013.01);
Abstract
Provided is a ball screw capable of reducing unevenness of load distribution of balls and extending a service life of the ball screw. In the ball screw, one end partof a nuton a flange-side is closer to an endof a screw shafton a fixed side than the other end partof the nuton a side opposite the flange-is, two or more circulation pathstoare arranged in an axial direction of the nut, and a diameter of a ballin the circulation pathclosest to the flange-of the nutis smaller than a diameter of a ballin the circulation pathremotest from the flange-of the nut