Patent ID: 8991798
Filing Date: 2015-03-31
Classification: B60G,F16F

Abstract:
1. A pneumatic spring strut for a vehicle, having a working chamber which is at least partially enclosed by a pneumatic spring bellows composed of elastomeric material and having a telescopic damper which is arranged centrally and at least partially within the working chamber, said damper comprising a housing, which is formed as a damper cylinder and which has a damping piston situated at the inside, and comprising a piston rod which is connected to the damping piston, wherein the pneumatic spring bellows is fastened at one end thereof to the pneumatic spring cover and is fastened at the other end thereof, so as to form a roll fold, to a pneumatic spring piston connected to the damper cylinder and can roll on the outer side of said pneumatic spring piston, wherein i) the pneumatic spring piston is connected, at its top end and above the roll fold, to the damper cylinder by an elastic bearing, ii) the elastic bearing is composed of an elastomer body which is provided between a radially outwardly projecting collar, which is situated on the damper cylinder, and a radially inwardly projecting flange), which is arranged on the pneumatic spring piston, iii) the collar situated on the damper cylinder is arranged below the piston-rod-side end of the damper cylinder, and iv) an air gap is formed that extends from a side surface of the elastomer body toward a side surface of the damper cylinder.