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:
Oct. 12, 2021
Filed:
Mar. 13, 2018
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
Yasuhiro Aoki, Yokohama, JP;
HITACHI ASTEMO, LTD., Ibaraki, JP;
Abstract
Electrorheological fluid is loaded in a shock absorberas hydraulic fluid. The shock absorbercontrols a generated damping force by producing a potential difference in an electrode passageto thus change viscosity of electrorheological fluid flowing in the electrode passage. A plurality of partition wallsis provided in the electrode passageformed between an inner tubeand an electrode tube. Due to this configuration, a plurality of helical flow passagesis formed in the electrode passage. In this case, the flow passagesare each provided with a flow passage cross-sectional area change portion that allows the flow passageto have a larger cross-sectional area on one side spaced apart from an entranceAside (an intermediate region F) at least compared to the entranceAside of the extension-side flow passage(an inflow region E).