WORKING PLATFORM

1 . A working platform, comprising a ground drive; a platform; telescoping support means having one end connected to said ground drive and another end connected to said platform; adjusting means for extending and retracting said telescoping support means for expanding and retracting said support means, said support means including support means segments which are at least partially nested inside each other, said adjusting means being assigned to a displaceable support means segment of said support means segments.

2 . A working platform as defined in claim 1 , wherein said support means include three support means segments which are at least partially nested inside each other, said adjusting means being assigned to a middle support means segments of said support means segments.

3 . A working platform as defined in claim 1 , wherein said adjusting means include a reciprocating cylinder system having at least one piston rod which is coupled with a chassis of said ground drive, and a piston rod coupled with said platform.

4 . A working platform as defined in claim 3 , wherein said reciprocating cylinder system includes a first reciprocating cylinder and a further reciprocating cylinder which are coupled with a same displaceable support means segment of said support means segments and with each other via a line system so that piston-rod side pressure chambers and piston-surface side pressure chambers of said reciprocating cylinders are interconnected.

5 . A working platform as defined in claim 4 , wherein said line system includes at least one non-return valve and one pressure reservoir unit.

6 . A working platform as defined in claim 4 , wherein said piston-rod side pressure chambers and said piston-surface side pressure chambers of said reciprocating cylinders assigned to corresponding ones of said support means are interconnected.

7 . A working platform as defined in claim 3 , wherein said piston rods of said adjusting means are configured as reciprocating cylinders in which a pressure reservoir medium is guided inside.

8 . A working platform as defined in claim 7 , and further comprising swivel joints which connect elements selected from the group consisting of said reciprocating cylinders, said support means segments, and both, connected with a chassis of said ground drive and said platform, to said chassis and said platform.

9 . A working platform as defined in claim 8 , wherein said swivel joints are configured as ball joints.

10 . A working platform as defined in claim 8 , wherein at least one of said swivel joints is configured as a compound slide joint.

11 . A working platform as defined in claim 1 , wherein said support means include at least three support means provided between said ground drive and said platform, which cross each other and connect said platform with said ground drive, at least two of said three support means being positioned in parallel with each other and at least one further support means of said three support means is located between said two parallel support means.

12 . A working platform as defined in claim 1 , further comprising a cable tension sensor assigned to each of said support means such that a guide cable detects a change in length of a respective one of said support means.

13 . A working platform as defined in claim 1 , further comprising a tilt sensor assigned to an element selected from the group consisting of said ground drive, said support means, said platform, and a combination thereof.

14 . A working platform as defined in claim 1 , further comprising a control and regulating unit which compares actual length signals, with which a change in length of a respective one of said support means is encoded, with target length signals, and the control and regulating unit generates stop signals if the actual length signals detected match the target length signals specified, to halt a motion of said support means segments.

15 . A working platform as defined in claim 1 , further comprising tilt sensors which generate tilt signals determining a tilt of said platform; a control and regulating unit which compares a change in a length of said support means encoded in actual length signals with target length signals taking into account the tilt of said platform, and the control and regulating unit generates stop signals if the actual length signals detected match the target length signal specified, to halt a motion of said support means signals.

16 . A working platform as defined in claim 1 , wherein said ground drive includes a plurality of land wheels, said land wheels including a wheel body formed by adjacent support elements, said support elements rotatably accommodating a plurality of rolling bodies between each other and on a peripheral circle, said rolling bodies extending at least partially beyond a circumference of said support elements and their axes of rotation are oriented diagonally to a land wheel axle of said wheel body.

17 . A working platform as defined in claim 16 , wherein at least one of said rolling bodies has an outer contour with an elliptical shape, wherein a geometry of an ellipse of said elliptical shape is adapted to a geometry of a cylindrical envelope described by said rolling bodies of said land wheel when it rotates around said wheel axle.

18 . A working platform as defined in claim 16 ; further comprising at least one hydromotor for actively driving a respective one of said land wheels and assigned to each of said land wheels of said ground drive; and an electrical control circuit providing a hydraulic oil medium.

19 . A working platform as defined in claim 1 , wherein said ground drive includes a plurality of land wheels arranged in pairs, and a wheel motor assigned to at least one of said land wheels in a respective one of said pairs.

20 . A working platform as defined in claim 19 , wherein said wheel motor is assigned to each of said paired land wheels, and a drive of at least one of the wheel motors of said pairs wheels is limited to overcoming a rolling friction between a particular one of said land wheels and a ground.

21 . A working platform as defined in claim 18 , further comprising an electrical control circuit which operates using a battery; and a battery regulator assigned to said battery and providing only so much electrical energy that a pump capacity of a hydraulic oil medium exactly matches a power output of driven land wheels.

22 . A working platform as defined in claim 1 , wherein said support means segments that are at least partially nested inside of each other in a telescoping manner have a prismatic cross-section.