Abstract: An automatic safety helmet and cover protection can be worn on the back, mainly of people who play sport. The protection device is stored in a rucksack casing (3) and is attached to back straps (4-6). The casing accommodates essentially a guard (11-19), a drive member and a control mechanism. There is storage space in the center for various implements. By triggering a spring accumulator (40.1, 40.2), the protection device is rotated, in the event of a threatening fall, into an erect protective position in fractions of a second by way of a trigger cord or by automatic actuation due to a sensor (23). The protective position is held at the top by a toothed catch member (7.1, 7.2). Mating toothing on the catch member maintains the protective position even in the event of a change in direction.

Abstract: A piston-cylinder unit, which erects a swingable roll bar in a crash situation by an ejection spring, includes a controllable drive by which the movement and the direction of movement of the piston can be controlled and which can be disengaged in the event of a crash pulse, whereupon the piston extends rapidly by virtue of the ejection spring.

Abstract: A fastening arrangement of the inner roof covering of motor vehicles in which the edge area of the roof covering is constructed either U-shaped or L-shaped and is fixed by suspension at a mounting bar secured at the inner roof edge area of the vehicle; the mounting bar is provided with angularly bent flanges for receiving an elastic seal that serves simultaneously as positional retention means of the suspended area of the roof covering.