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:
Aug. 14, 2012
Filed:
Feb. 14, 2006
Morihisa Yoshioka, Iwata, JP;
Keisuke Kazuno, Iwata, JP;
Morihisa Yoshioka, Iwata, JP;
Keisuke Kazuno, Iwata, JP;
NTN Corporation, , JP;
Abstract
An electrically driven linear actuator with a smooth motion of a ball screw provides an even load distribution as well as a stable motion of the balls and has an electric motor () mounted on a housing (). A nut (or), adapted to mate with the screw shaft (), has a pair of supporting portions () at an axially central position on the outer circumferential surface of the nut (or) to engage one end of a link (). The nut () is formed with a screw groove (). Oval bridge windows () are formed in the nut (or) through a wall with a portion of the screw groove () cut out over a distance of at least two pitches of the screw grooves (). A bridge member (), forming the circulating member, is fitted in each of the bridge windows ().