Patent ID: 6334366
Filing Date: 2002-01-01
Classification: B60R,Y10T

Abstract:
A driving device for a rollover bar for a motor vehicle comprising:a first piston-cylinder unit coupled to the rollover bar, the first piston-cylinder unit having a piston coupled to a cylinder; a second piston-cylinder unit coupled to the first piston-cylinder unit for adjusting the first piston-cylinder unit; an ejection spring coupled to the first piston-cylinder unit to extend the piston and cylinder of the first piston-cylinder unit to extend the rollover bar out of a lowered rest position to a raised supporting position in a crash situation; a crash coupling that couples the first and second piston-cylinder units and prevents extension of the piston and cylinder of the first cylinder unit by the ejection spring and in a crash situation decouples the first piston-cylinder unit from the second piston-cylinder unit to permit the piston and cylinder of the first piston-cylinder unit to be extended by the ejection spring independent of influence of the second piston-cylinder unit; an interlock coupled to the first piston-cylinder unit and movable from an engaged position where it prevents retraction of the piston and cylinder of the first piston-unit to a disengaged position where it permits the piston and cylinder of the first piston-unit to be retracted; a locking device coupled to a piston and cylinder of the second piston-cylinder unit and movable between an engaged position and a disengaged position, the locking device preventing the piston and cylinder of the second piston-cylinder unit from extending from a rest position when in the engaged position and permitting the piston and cylinder of the second piston-cylinder unit to extend from the rest position when in the disengaged position; and an actuator coupled to the interlock and locking device for simultaneously actuating the interlock and locking device to move between their engaged and disengaged positions.