Abstract: A radiator shutter provided for the frontal arrangement at a motor vehicle shows two groups of lamellae, which are pivotally supported at opposite sides of a drive unit, each parallel in reference to a shutter frame. For a joint pivoting of the lamellae an entrainer tappet provided here at a distance from its bearing axis in the direction perpendicular in reference to the longitudinal direction of the lamellae, engages a common coupling element. For a simple production of the engagement of the bearing tappets of the lamellae in the shutter frame and its entrainer tappets in the coupling element they are latched in bearing recesses open perpendicular in reference to the bearing axis.

Abstract: A servo drive for the set ring of a louver for a motor vehicle has a self-locking gear motor, the output shaft of which is coupled with a control crank. The end of the control crank turned away from the output shaft is connected by way of a link in a toggle-like manner with a positioning rod that is longer by a multiple of its length, of which the end turned away from the control crank is coupled with the set ring. A housing that protects the crank drive extends along the circumference of the set ring and is fastened on the radiator frame together with a servo drive housing.

Abstract: The radiator shutter provided for the frontal arrangement at a motor vehicle shows two groups of lamellae (2-4, 5-7), which are pivotally supported at opposite sides of a drive unit (68), each parallel in reference to a shutter frame (9). For a joint pivoting of the lamellae (2-7) an entrainer tappet (99-104) provided here at a distance from its bearing axis (109) in the direction perpendicular in reference to the longitudinal direction of the lamellae, engages a common coupling element (98). For a simple production of the engagement of the bearing tappets of the lamellae in the shutter frame (9) and its entrainer tappets (99-104) in the coupling element (98) they are latched in bearing recesses (32-37) open perpendicular in reference to the bearing axis.

Abstract: The louver for a motor vehicle radiator has radially arranged fins (4) mounted in a circular channel (2) of a radiator frame (3) so they can be swiveled around their longitudinal axis, which are linked in the area of their radial outer ends with a set ring (5) surrounding the channel (2) for the execution of a swiveling motion between an open and closed position of the louver. A servo drive (6) for the set ring (5) has a self-locking gear motor, the output shaft (10) of which is coupled with a control crank (11). The end of the control crank (119 [sic: (11)] turned away from the output shaft (10) is connected by way of a link (12) in a toggle-like manner with a positioning rod (13) that is longer by a multiple of its length, of which the end turned away from the control crank (11) is coupled with the set ring (5). Such a housing (18) that protects the crank drive (11, 13) extends along the circumference of the set ring (5) and is fastened on the radiator frame (3) together with a servo drive housing (9).

Abstract: The jalousie for the control of the air flow through the engine cooler of a vehicle has rotatable fins (2), which are supported on one side in an outer housing ring (47) provided for the connection with the engine cooler of the vehicle and on the other side in an inner supporting ring (4). The swivelling of the fins (2) occurs with an adjusting ring (45), whose engaging portions (46) work together with counter-engaging portions (10) provided at the fin ends. The adjusting ring (45) with its engaging portions (46) and the counter-engaging portions (10) of the fins (2) are enclosed together on all sides in a hollow space (49) circumferentially extending around along the adjusting ring (13, 45) for the protection against contaminants and consequently for its safe function, which is limited by two profile rings (47, 50) interlocking with each other all around.