Abstract: An adjustable steering column for a motor vehicle includes a setting unit displaceable in at least one displacement direction for setting the position of the steering column, a holding unit nondisplaceable into this displacement direction, a securement device, in the opened state of which the setting unit (4) is displaceable with respect to the holding unit for setting the position of the steering column and in the closed state of which the setting unit (4) is secured in position by the securement device, and a crash blocking device, which is displaceable between a passive state and an active state. The blocking device raises an additional holding force against a displacement of the setting unit with respect to the holding unit into at least one displacement direction.

Abstract: An adjustable steering column for a motor vehicle includes a setting unit displaceable in at least one displacement direction for setting the position of the steering column, a holding unit nondisplaceable into this displacement direction, a securement device, in the opened state of which the setting unit (4) is displaceable with respect to the holding unit for setting the position of the steering column and in the closed state of which the setting unit (4) is secured in position by the securement device, and a crash blocking device, which is displaceable between a passive state and an active state. The blocking device raises an additional holding force against a displacement of the setting unit with respect to the holding unit into at least one displacement direction.

Abstract: In a pneumatic nail driver, compressed air drives a working piston in the driving direction within a working cylinder. An inlet valve controls the flow of compressed air into the working cylinder. A sensing element mounted on the front end of the driver moves opposite to the driving direction when it is pressed against the receiving material for the nail. The sensing element pivots a shift lever which in turn moves a safety valve for controlling in one position the flow of compressed air to the control space associated with the inlet valve and in another position to connect the control space to the ambient atmosphere.