Vibration damper

US8245823B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Bernd Zeissner · Volkach, DE
• Andreas Foerster · Coburg, DE
• Frank Gundermann · Marktsteinach, DE
• Steffen Heyn · Niederwerrn, DE
• Anton Krawczyk · Windeck, DE
• Uwe Boecker · Lohmar, DE
• Thomas Thein · Schweinfurt, DE
• Wolfgang Breun · Bitburg, DE
• Herbert Bies · Bad Neuenahr-Ahrweiler, DE
• Holger Beyer · Pfarrweisach, DE
• Ludwig Gampl · Schwanfeld, DE
• Heinz-Joachim Gilsdorf · Gerolzhofen, DE
• Klaus Sauer · Wiesloch, DE

Key dates

• Filing date: Aug 18, 2006
• Grant date: Aug 21, 2012
• Expiry date: Sep 24, 2028

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F9/49
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Disclosed is a vibration damper comprising a cylinder in which a piston rod is guided in an axially movable manner. A first piston is mounted stationarily on the piston rod while a second piston that is equipped with at least one valve disk biased by a spring assembly is mounted on the piston rod so as to be axially movable counter to a force of at least one support spring. The spring assembly is provided with at least one spring plate on which the spring assembly rests. The second piston is retained by a fixing sleeve which supports the at least one spring plate. The structural unit encompassing the fixing sleeve and the at least one spring plate is fitted with an axially effective separating joint for a locking connection inside the structural unit. The entire structural unit can be axially displaced towards the at least one support spring.