Adjustable damping valve device

US10760637B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Thomas Manger · Hammelburg, DE
• Lukas RUHMANN · Gremsdorf, DE
• Stefan Schmitt · Goldbach, DE

Key dates

• Filing date: Dec 15, 2015
• Grant date: Sep 1, 2020
• Expiry date: May 27, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F2230/24
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An adjustable damping valve device for a vibration damper, includes a main stage valve which is controlled by a pre-stage valve with a pre-stage valve body, which pre-stage valve can be actuated by an electromagnetic actuator, wherein an emergency operation valve controls the main stage valve during emergency operation, wherein an emergency operation armature is preloaded on the pre-stage valve body of the pre-stage valve by an emergency operation spring so that the pre-stage valve forms the emergency operation valve.