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:
May. 31, 2016
Filed:
Oct. 31, 2012
Tatsuya Yamasaki, Shizuoka, JP;
Yui Masuda, Shizuoka, JP;
Makoto Muramatsu, Shizuoka, JP;
Masaaki Eguchi, Shizuoka, JP;
Yuki Saoyama, Shizuoka, JP;
Tatsuya Yamasaki, Shizuoka, JP;
Yui Masuda, Shizuoka, JP;
Makoto Muramatsu, Shizuoka, JP;
Masaaki Eguchi, Shizuoka, JP;
Yuki Saoyama, Shizuoka, JP;
NTN CORPORATION, Osaka, JP;
Abstract
An electric linear motion actuator includes: a rotary shaft to be driven by an electric motor; a plurality of planetary rollers kept in rolling contact with a cylindrical surface formed on an outer periphery of the rotary shaft; a carrier which retains the planetary rollers such that the planetary rollers are rotatable about axes thereof while revolving around the rotary shaft, and of which axial movement is restricted; and an outer ring member surrounding the planetary rollers and supported so as to be slidable in an axial direction. Helical ribs are formed on an inner periphery of the outer ring member; and circumferential grooves are formed on an outer periphery of each of the planetary rollers so as to be engaged with the helical ribs. A rotation of the rotary shaft is thus converted to a linear motion of the outer ring member.