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:
Mar. 17, 2026
Filed:
Sep. 13, 2021
Hitachi Astemo, Ltd., Hitachinaka, JP;
Hirohito Ishii, Hitachinaka, JP;
Takao Nakadate, Hitachinaka, JP;
Osamu Yuno, Hitachinaka, JP;
Yuta Yamaguchi, Hitachinaka, JP;
HITACHI ASTEMO, LTD., Ibaraki, JP;
Abstract
A shock absorber is configured in such a manner that a flow passage area of each of first orificesandis smallest throughout a communication passage that establishes communication between a chamberA orB on an upstream side and a chamberB orA on a downstream side, and therefore prevents a pressure in a back-pressure chamberorfrom excessively increasing. As a result, the shock absorber can prevent overshoot of a damping force due to a delay of valve opening of a main valveordue to a remaining pressure in the back-pressure chamberorwhen a movement of a pistonis switched from one direction to an opposite direction.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile