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:
Feb. 18, 2014
Filed:
May. 23, 2012
Toru Takahashi, Iwata, JP;
Yoshinori Ikeda, Iwata, JP;
Tatsunori Shimizu, Iwata, JP;
NTN Corporation, Osaka-shi, JP;
Abstract
An electric actuator has a housing (), an electric motor (), a speed reduction mechanism (), a ball screw mechanism () and a rotation sensor (). The ball screw mechanism () has a screw thread shaft () that moves axially but cannot rotate relative to the housing (). A nut () is inserted over the screw thread shaft () and can rotate relative to the housing (), via a rolling bearing (), mounted on the housing (), but cannot move axially. A swing link () is arranged to perform the pendulum motion interlocked with the linear motion of the driving shaft (). A magnet () is mounted on the end of a pivotal shaft () to form the reference point of the pendulum motion. The position of the driving shaft () is detected by the rotation sensor () arranged opposite to the magnet () via a predetermined air gap.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile