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. 20, 2016
Filed:
Mar. 31, 2015
Applicant:
Jtekt Corporation, Osaka-shi, Osaka, JP;
Inventors:
Assignee:
JTEKT CORPORATION, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B62D 5/04 (2006.01); F16H 25/22 (2006.01); B23C 3/30 (2006.01); F16H 25/20 (2006.01); F16H 25/24 (2006.01);
U.S. Cl.
CPC ...
B62D 5/0448 (2013.01); B23C 3/30 (2013.01); B62D 5/0424 (2013.01); F16H 25/2204 (2013.01); F16H 25/2214 (2013.01); F16H 25/2223 (2013.01); F16H 2025/2081 (2013.01); F16H 2025/2096 (2013.01); F16H 2025/2481 (2013.01); Y10T 74/18576 (2015.01); Y10T 74/19772 (2015.01); Y10T 409/303752 (2015.01);
Abstract
A ball screw device is provided for which quality can be easily evaluated. The ball screw device includes a threaded shaft with a groove formed on an outer peripheral surface of the shaft, and a cylindrical nut whose screw-thread mates with the groove on the threaded shaft via a plurality of balls. The nut has a pair of mounting holes in each of which a deflector is installed and a communication groove that allows the mounting holes to communicate with each other and is open on the outer peripheral surface of the nut and through which the balls can roll. The width W of an opening of the communication groove is smaller than the diameter of the ball.