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:
Mar. 27, 2012
Filed:
Oct. 31, 2008
Hajime Watanabe, Kashiwara, JP;
Tomoyuki Aida, Kashihara, JP;
Hajime Watanabe, Kashiwara, JP;
Tomoyuki Aida, Kashihara, JP;
JTEKT Corporation, Osaka-Shi, Osaka, JP;
Abstract
First shoulder portions are formed on the outer periphery of the shaft such that the first spline grooves are interposed between the first shoulder portions adjacent to each other in a circumferential direction of the shaft. Second shoulder portions are formed on the inner periphery of the outer tube such that the second spline grooves are interposed between the second shoulder portions adjacent to each other in a circumferential direction of the outer tube. Main passages of spline-purpose ball circulation passages are formed with the first and second shoulder portions. Clearance are formed respectively between the first and second shoulder portions and the spline-purpose balls in a rotational direction of the screw shaft and the spline-purpose outer tube. The spline-purpose balls disposed in the main passages bear a clockwise torque and a counterclockwise torque transmitted between the screw shaft and the spline-purpose outer tube.