An electromagnetic shock absorber according to the present invention has a shock absorber body 1 which makes telescopic motion in response to an input from outside. The shock absorber body 1 comprises a ball screw mechanism 15, which converts the telescopic motion into rotary motion and is composed of...http://www.google.es/patents/US7357229?utm_source=gb-gplus-sharePatente US7357229 - Electromagnetic shock absorber
