Abstract: A double-jointed cardan shaft for vehicles includes a first yoke journal assembly disposed in a first fork joint, the first fork joint including a ball calotte, a second yoke journal assembly disposed in a second fork joint, and a connection element connecting the first and second fork joints. A centering ball is disposed in the ball calotte and has a bore. A first cavity is formed between the centering ball and the ball calotte. An elastic gasket disposed outside of the ball calotte forms a second cavity between the elastic gasket and the ball calotte. A centering pin is connected to the second fork joint and disposed in the bore, and a plurality of lubricant recesses for a lubricant are disposed at an interface between the centering pin and the bore. The centering ball includes at least one indentation extending along an outer circumferential surface of the centering ball such that no lubricant may pass from the first cavity to the second cavity.

Abstract: A double-jointed cardan shaft for vehicles includes a first yoke journal assembly disposed in a first fork joint, the first fork joint including a ball calotte, a second yoke journal assembly disposed in a second fork joint, and a connection element connecting the first and second fork joints. A centering ball is disposed in the ball calotte and has a bore. A first cavity is formed between the centering ball and the ball calotte. An elastic gasket disposed outside of the ball calotte forms a second cavity between the elastic gasket and the ball calotte. A centering pin is connected to the second fork joint and disposed in the bore, and a plurality of lubricant recesses for a lubricant are disposed at an interface between the centering pin and the bore. The centering ball includes at least one indentation extending along an outer circumferential surface of the centering ball such that no lubricant may pass from the first cavity to the second cavity.

Abstract: A seal for a universal joint cross trunnion is accommodated in a bearing bush for a universal joint shaft and has an outer and an inner, ring-shaped, sealing body which are insertable into the bearing bush and operatively connected, and which permit mutual adjustment. The two sealing bodies include meshing sealing elements having a positive-locking design. The inner sealing body includes an enveloping part which overlaps the other sealing body and/or the bearing bush at least partially.