Patent ID: 7201260

Claim:
An arrangement for amplitude-dependent shock absorption for motor vehicles, comprising: a damping housing; a piston connected to an oscillating piston rod projecting into said housing, said piston being radially guided and axially spring-loaded with limited motion dividing said housing into two damping chambers; two springs for tensioning said piston between said springs; said piston rod terminating in an extension surrounded by said piston; a guidance bushing between said extension and said piston, said bushing having an outer cylindrical guiding surface, said piston sliding over said guiding surface with sliding motion relative to said bushing, said guiding surface guiding sliding motion of said piston relative to said bushing at least one axially extending groove on the outer circumference of said bushing and having a length greater than a height of a corresponding bore in said piston, said groove being a bypass between said two chambers.