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. 10, 2024
Filed:
Aug. 24, 2020
Zf Friedrichshafen Ag, Friedrichshafen, DE;
Jörg Rösseler, Ruppichteroth, DE;
Aleksandar Knezevic, Eitorf, DE;
ZF FRIEDRICHSHAFEN AG, Friedrichshafen, DE;
Abstract
A damping valve device for a vibration damper having a piston rod includes a first damping valve which, in a first operating range, moves into an operating position allowing throughflow as the flow velocity of a damping medium increases. A second operating range having a progressive damping force characteristic is influenced by a throttle point in conjunction with a valve body. The valve body is configured as a ring element which has a variable diameter and carries out a radial closing movement in the direction of a flow guiding surface at which a defined minimum throughflow cross-section is maintained, a pressure control valve being hydraulically parallel-connected to the throttle point.