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:
Jul. 27, 2021
Filed:
Dec. 26, 2017
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
Yasuhiro Aoki, Yokohama, JP;
Umi Tanabe, Kawasaki, JP;
HITACHI ASTEMO, LTD., Ibaraki, JP;
Abstract
Electrorheological fluid is loaded in a shock absorber () as hydraulic fluid (). The shock absorber () controls a generated damping force by causing a potential difference to be generated in an electrode passage () and controlling a viscosity of the electrorheological fluid passing through this electrode passage (). A plurality of partition walls () is provided between an inner cylinder () and an electrode cylinder (). By being configured in this manner, the shock absorber () forms a plurality of helical flow passages () between the inner cylinder () and the electrode cylinder (). In this case, an inclination angle of each of the partition walls () is not constant, and each of the partition walls () includes a sharply inclined portion (A) inclined at a large angle on at least an entrance side of an extension-side flow passage ().