Vibration damper with a hydraulic pressure stop

US6814193B2 · kind B2 · utility

Assignee

• ZF Sachs AG · DE

Inventor

• Manfred Grundei · Niederwerrn, DE

Key dates

• Filing date: May 23, 2003
• Grant date: Nov 9, 2004
• Expiry date: May 23, 2023

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F9/50
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A vibration damper with a hydraulic-mechanical pressure stop includes a cylinder filled with damping medium; a piston rod movable in and out of the cylinder, a first piston fixed to the piston rod with freedom of axial movement, a second piston spaced from the first piston, a transfer spring in the second working space for moving the second piston toward the third working space in response to movement of the first piston toward the second working space; and a disk valve which allows damping medium to flow from the third working space through the second piston to the second working space as the second piston moves toward the third working space. The first piston divides the cylinder into a first and a second working space where the piston rod extends through the first working space. The second piston separates the second working space from a third working space.