Abstract: In a motor vehicle and or a subassembly of a motor vehicle, e.g., a convertible or a roadster, with an opening roof, e.g., a soft top or a hardtop, which includes roof parts or roof elements which are mounted on a main bearing device so as to be able to pivot from a closed position into an open position, the main bearing device is fastened to a supporting structure of the motor vehicle, and with a roll bar which is fitted to the motor vehicle so as to be able to pivot from a storage position into a protective position. To reduce manufacturing costs, the main bearing device has an additional, secondary bearing device on which the roll bar is pivotally mounted.

Abstract: In a motor vehicle and or a subassembly of a motor vehicle, e.g., a convertible or a roadster, with an opening roof, e.g., a soft top or a hardtop, which includes roof parts or roof elements which are mounted on a main bearing device so as to be able to pivot from a closed position into an open position, the main bearing device is fastened to a supporting structure of the motor vehicle, and with a roll bar which is fitted to the motor vehicle so as to be able to pivot from a storage position into a protective position. To reduce manufacturing costs, the main bearing device has an additional, secondary bearing device on which the roll bar is pivotally mounted.

Abstract: A rollover protection system for motor vehicles, especially for convertibles, is described, with a head restraint assigned to a vehicle seat and a rollover member displaceable by an at least approximately translational movement from a lowered inoperative position upwards into a support position, the head restraint being intended to have a recess open at the bottom. The rollover member, at least in a position of non-use and in the event of overturning, is accommodated with its upper section in the recess of the head restraint.

Abstract: A driving device for a rollover bar for motor vehicles has a piston-cylinder unit that, in a crash situation, extends the rollover bar out of a rest position into a supporting position. A further or second piston-cylinder unit is provided as an additional drive for the purpose of adjusting the first piston-cylinder unit. The influence of the further piston-cylinder unit on the first piston-cylinder unit can be cancelled in the presence of a crash signal. The piston of the first piston-cylinder unit has detent toothing formed on it which acts counter to a retraction movement of the first piston-cylinder unit and with which a controllable detent element is brought into engagement by means of a hydraulic cylinder in any extended position. A piston of the further piston-cylinder unit is held releasably in its retracted position by a controllable locking device.