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. 12, 2017
Filed:
Nov. 28, 2015
Ntn Corporation, Osaka-shi, JP;
Kensuke Funada, Iwata, JP;
NTN Corporation, Osaka-shi, JP;
Abstract
An electric linear actuator has an electric motor, a speed reduction mechanism, and a ball screw mechanism to convert rotational motion of the electric motor to an axial linear motion of a drive shaft. The ball screw mechanism nut and screw shaft both include helical screw grooves with a large number of balls between them. The housing has a first housing portion and a second housing portion. The electric motor is mounted on the first housing portion. The second housing portion abuts an end face of the first housing portion. The first housing portion has a cylindrical gear containing portion to contain the speed reduction mechanism. An end part of the gear containing portion extends radially inward to form a bottom portion to cover the speed reduction mechanism. The bottom portion of the first housing portion and the second housing portion are formed, respectively, with abutment surfaces.