Abstract: The invention relates to a belt tightening device for a seat belt having at least two pyrotechnically drivable drive units 10, 11 which can be moved in guides 14, 32 in a housing 1 and which, in a chronologically adapted succession, can be brought into a driving engagement with a winding shaft of a seat belt retractor and cause this shaft to carry out a rotating movement which tightens the belt. Furthermore a sun gear 2 is provided which can be rotationally coupled with the winding shaft, as well as a planet gear 7 which is guided on a circular-segment-shaped moving path around the sun gear 2, this planet gear 7 moving along a housing-fixed toothing 9 and simultaneously being in a rotation-transmitting engagement with an external toothing of the sun gear 2, and each drive unit 10, 11 for transmitting its driving movement onto the planet gear 7, being coupled with this planet gear 7 for a defined movement section of the planet gear 7.

Abstract: A drive mechanism has a guide pipe, a piston which is guided in the guide pipe and is driven by a propellant that is generated by a gas generator, and a traction mechanism which connects the piston to the component to be driven.

Abstract: A device for lifting and/or lowering a load, in particular a two-wheeled vehicle such as a bicycle, onto or off of a load carrier connected to a motor vehicle, has an extension arm with which the load can be comfortably lifted and lowered.

Abstract: A locking device for securing at least first and second members which are movable relative to each other in response to a force acting thereon, in a locked rest position, with a release mechanism for releasing the members from their locked position, includes a locking element providing at least first and second support locations at which respective ones of the first and second mutually relatively movable members bear against the locking element to hold them in a locked condition. The co-operation of the locking element and one of the mutually relatively movable members provides a pivot axis about which the locking element is pivotable under the effect of an unlocking moment, to provide a release action. The device further includes a stationary stop means against which, in the locked position, the locking element bears due to the unlocking moment applied thereto.