Vibration damper with amplitude-dependent damping force

US7172057B2 · kind B2 · utility

Assignee

• ZF Sachs AG · DE

Inventors

• Frank Gundermann · Marktsteinach, DE
• Joachim Kuhnel · Dittelbrunn, DE
• Christian Böhm · Neutraubling, DE
• Heinz-Joachim Gilsdorf · Gerolzhofen, DE

Key dates

• Filing date: Dec 17, 2003
• Grant date: Feb 6, 2007
• Expiry date: Dec 17, 2023

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F9/5126
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Vibration damper comprising a piston rod, which is guided with freedom of axial movement in a damping medium-filled cylinder and which carries a piston, which divides the cylinder into two working spaces. At least one of the two working spaces has a flow connection leading to a housing, in which a separating element separates at least one chamber from one of the two working spaces, where the volume of the minimum of one chamber in the housing has a size which is variable within defined limits. The separating element executes relative motion with respect to the housing, and is located in a permanent position with respect to the piston rod, whereas the housing is movable with respect to the piston rod.