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. 21, 2021
Filed:
Dec. 21, 2017
Applicant:
Jtekt Corporation, Osaka, JP;
Inventors:
Gento Aramoto, Osaka, JP;
Naoko Sakaguchi, Toyota, JP;
Assignee:
JTEKT CORPORATION, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 25/24 (2006.01); F16H 25/22 (2006.01); F16D 65/18 (2006.01); F16D 121/24 (2012.01); F16D 125/48 (2012.01); F16D 125/40 (2012.01);
U.S. Cl.
CPC ...
F16H 25/2454 (2013.01); F16D 65/18 (2013.01); F16H 25/2204 (2013.01); F16H 25/2209 (2013.01); F16H 25/2233 (2013.01); F16H 25/2238 (2013.01); F16H 25/24 (2013.01); F16D 2121/24 (2013.01); F16D 2125/40 (2013.01); F16D 2125/48 (2013.01); F16H 2025/2463 (2013.01);
Abstract
In a ball screw apparatus, a ball train including a plurality of main balls is housed in a raceway between a ball track of a ball nut and a ball track of a ball screw shaft. A coil spring housed in the raceway includes a first end that engages with an end of the ball train and a second end supported by a stopper (a first recessed portion, a protruding portion, or the like) of the ball nut. A stopper ball having a diameter larger than the diameter of the main ball is interposed between the stopper and the second end of the coil spring.