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:
Dec. 03, 2013
Filed:
Feb. 17, 2009
Tatsuya Yamasaki, Iwata, JP;
Masaaki Eguchi, Iwata, JP;
Katsuhisa Yamaguchi, Iwata, JP;
Tomoaki Makino, Iwata, JP;
Tatsuya Yamasaki, Iwata, JP;
Masaaki Eguchi, Iwata, JP;
Katsuhisa Yamaguchi, Iwata, JP;
Tomoaki Makino, Iwata, JP;
NTN Corporation, Osaka, JP;
Abstract
In an electric linear motion actuator, planetary rollersrotatably supported on their radially inner surfaces by respective support pinsare radially inwardly biased by radially compressible ring springsenveloping the support pins, thereby biasing and pressing the respective planetary rollersagainst the radially outer surface of a rotary shaft. Thus, it is possible to stably transmit torque of the rotary shaftto the respective planetary rollerswithout applying a preload to the planetary rollerswith a negative gap between the radially outer surface of the rotary shaftand the radially inner surface of the outer ring member