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:
Apr. 15, 2008
Filed:
May. 28, 2003
Takuhiro Kondo, Tokyo, JP;
Hideki Yamagata, Tokyo, JP;
Yoshihiro Suda, Tokyo, JP;
Kayaba Industry Co., Ltd., Tokyo, JP;
The Foundation for the Promotion of Industrial Science, Tokyo, JP;
Abstract
An electromagnetic shock absorber according to the present invention has a shock absorber bodywhich makes telescopic motion in response to an input from outside. The shock absorber bodycomprises a ball screw mechanism, which converts the telescopic motion into rotary motion and is composed of a ball nutand a screw shaft, and power transmitting sectionsandhaving elastic bodies which transmit the rotary motion of the ball screw mechanismto a rotary shaftof a motorwhile shifting a transmission phase when transmission torque of the rotary motion is changed. The motorgenerates electromagnetic resistance to oppose against rotations which input into the rotary shaft. Thus, vibration or the like which inputs into the shock absorber bodyfrom outside is damped by the electromagnetic resistance of the motor. Due to the power transmitting sectionsandwhich delay a rotary phase, moment of inertia of a rotor of the motoris eased when a shocking load inputs into the shock absorber body. Therefore, it is possible to make a vehicle more comfortable to drive when the electromagnetic shock absorber is applied as a shock absorber of the vehicle.