FIELD: machine engineering.
SUBSTANCE: device (1) comprises a base element (2), an upper element (3), and at least one intermediate element (4). Each element has a screw thread which interacts with the corresponding screw thread of the adjacent element. A drive means is provided to move the mentioned elements to thereby raise or lower the upper surface (6) of the lifting device (1). The intermediate element (4) can rotate during operation of the drive means, wherein the rotational movement of the upper and lower surfaces is preferably prevented. It is possible to simultaneously control several lifting devices (1) for lifting or lowering a load or another object.
EFFECT: increased safety of operation.
10 cl, 8 dwg
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