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:
Sep. 22, 2015
Filed:
Nov. 28, 2012
Hitachi Automotove Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Mikio Yamashita, Yokohama, JP;
Fumiyuki Yamaoka, Sagamihara, JP;
Masaru Kouyama, Ayase, JP;
Kunio Takiguchi, Yokohama, JP;
Atsufumi Ishimoto, Yokohama, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Ibaraki, JP;
Abstract
A shock absorber includes a first passage () or () and a second passage (), () or () in communication with each other and configured to allow a working fluid to flow between two chambers () and () based on movement of a piston (), and a passage area adjustment mechanism () or () configured to adjust a passage area of the second passage () or () depending on a position of a piston rod () is installed to have at least one of a maximum length-side property in which an extension-side damping force becomes soft and a compression-side damping force becomes hard in a range in which the piston rod () extends to an outside of a cylinder () farther than a maximum length-side predetermined position, and a minimum length-side property in which the extension-side damping force becomes hard and the compression-side damping force becomes soft in a range in which the piston rod () enters an inside of the cylinder () further than a minimum length side predetermined position.