Patent ID: 7097015

Claim:
A suspension system for motor vehicles, comprising: a piston-cylinder assembly of a suspension system for a motor vehicle having a working cylinder, a piston rod guidably inserted in a piston rod guide fitted to said working cylinder, a damping piston having damping valves, said damping piston being movably arranged in said working cylinder and connected to said piston rod, an enclosed envelope body provided in an equalization space, wherein a wall of said enclosed envelope is a gas-tight blocking layer having a changeable shape, a connecting element held in a bore defined in said piston rod guide, a longitudinal direction of said bore being approximately parallel to a longitudinal direction of said working cylinder, a bushing defining a side of a circumferential groove in said bore, and a resilient securing ring arranged in said groove, wherein said connecting element is connected to said enclosed envelope and non-detachably inserted into said bore in said piston rod guide for connecting said enclosed envelope to a flow connection, said connecting element having a shoulder which is engaged by said securing ring to prevent withdrawal of said connecting element from said bore.