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. 14, 2025
Filed:
Apr. 22, 2022
Hitachi Astemo, Ltd., Hitachinaka, JP;
Masato Tokuhara, Hitachinaka, JP;
Akira Nishimoto, Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
A damping force variable shock absorber includes a damping force variable mechanism including a damping force generator, a damping force variable actuator, and a damping force controller which controls an operation of the damping force variable actuator, and a vehicle height control mechanism including a self-pumping mechanism configured to, using a vibration caused by traveling of a vehicle as a driving force, pressurize a hydraulic oil and push a spring, a vehicle height variable actuator which switches a flow path of the hydraulic oil pressurize by self-pumping, and a vehicle height controller which controls an operation of the vehicle height variable actuator. The damping force controller performs a damping force variable control in which a damping force in a pushing process of the spring while a vehicle height is increasing is set to be weaker than a damping force during a period in which the vehicle height is not increasing.