Pneumatic spring for motor vehicles
AssigneeDaimler-Benz Aktiengesellschaft
InventorJosef Merkle
Life of this patent
Estimating the term…
Abstract
A pneumatic spring for motor vehicles which includes two supports as well as closed spring volumes and two spring surfaces of different sizes which surfaces are subjected to pressure in opposite directions and which are variable as a function of road clearance. The surfaces are supported coaxially against one another with the spring volume being formed by two roll bellows defining a common chamber. Effective spring surfaces of the bellows facing away from each other are supported upon spring pistons of different diameters which are connected together. The spring pistons and a casing associated with the roll bellows form the two supports.
Claims23
A pneumatic spring for motor vehicles which includes two supports, at least one closed spring volume, two spring surfaces of different sizes which are adapted to be subjected to pressure in opposite directions, the two spring surfaces each having an effective spring surface which is variable as a function of road clearance of the vehicle, and means for supporting the spring surfaces so as to be coaxial with respect to one another, characterized in that a casing is provided, two roll bellows are arranged in the casing and form the spring surfaces, the two roll bellows defining a common chamber forming at least a portion of the spring volume of the pneumatic spring, the supporting means includes a pair of spring piston means associated with the respective roll bellows, the spring piston means having different diameters and providing support for the respective bellows on sides of the effective spring surfaces which face away from each other, means are provided for connecting the spring piston means together, and in that the spring piston means and the casing of the pneumatic spring form a portion of the two supports.
Dependencies are inferred from the claim text.