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. 03, 2017
Filed:
Oct. 29, 2014
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
Kazuyuki Mizuno, Susono, JP;
Ryousuke Kamae, Yokohama, JP;
Hideki Hata, Yokohama, JP;
Sadatomo Matsumura, Yokohama, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Ibaraki, JP;
Abstract
A shock absorber including a piston () slidably fitted in a cylinder having hydraulic oil sealed therein. A flow of hydraulic oil, induced in a passage () and a sub-passage () by sliding movement of the piston in the cylinder in response to the stroke of a piston rod, is controlled by an extension main valve () and a compression sub-valve () incorporated in the extension main valve, thereby generating a damping force. The amount of deflection of a sub-disk () constituting the compression sub-valve when the sub-disk is opened is limited by restricting portions (). The sub-disk is provided with communicating holes () to reduce a differential pressure acting on the sub-disk when opened and also to relax the concentration of stress in the sub-disk, thereby improving the durability of the sub-disk.