Patent ID: 8042666

Claim:
A hydrodynamic clutch device comprising: a clutch housing which is rotatable about an axis of rotation and has a drive-side housing wall which extends radially inward at least essentially as far as said axis, the drive-side housing wall has an axial recess and radially inward extending teeth around said recess; a hydrodynamic circuit comprising a pump wheel and a turbine wheel in said clutch housing; a bridging clutch having a piston capable of shifting axially relative to said drive-side housing wall, the piston separating a pressure space adjacent to the drive-side housing wall from a supply space; a hub which is supported axially between the hydrodynamic circuit and the drive-side housing wall, the hub being connected for rotation in common to a take-off, the hub having at least one first flow passage connecting a first take-off side flow channel to the pressure space, at least one second flow passage connecting a second take-off side flow channel to the supply space, and a drive-side end with an axial bearing area; an axial contact surface provided between the drive-side housing wall and the axial bearing area the axial contact surface being provided in the axial recess; and an axial contact element received in said recess, the axial contact element having a higher hardness than the drive-side housing wall, the axial contact surface being provided on the axial contact element, wherein the drive-side end of the hub has radially extending grooves which form the first flow passages, wherein, said axial contact element has radially outward extending teeth which cooperate with said radially inward extending teeth to prevent rotation of said axial contact element with respect to said drive-side housing wall.