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:
Apr. 21, 2026
Filed:
Jul. 14, 2021
Hitachi Astemo, Ltd., Ibaraki, JP;
Takamasa Kotani, Hitachinaka, JP;
HITACHI ASTEMO, LTD., Ibaraki, JP;
Abstract
A shock absorber includes a first passage () through which a working fluid flows out from a chamber that is an upstream side to a chamber () that is a downstream side due to movement of a piston (), a first damping force generating mechanism () provided in the first passage () to generate a damping force, a second passage () provided separately from the first passage (), a second damping force generating mechanism () provided in the second passage () and opened to generate a damping force when a piston speed is lower than that of the first damping force generating mechanism (), a third passage () provided separately from the second passage (), a volume variable mechanism () provided in the third passage (), a fourth passage () provided separately from the third passage (), and a relief mechanism () provided in the fourth passage () and opened after the second damping force generating mechanism () is opened.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile