| 摘要 |
The present invention concerns a vertical movement device consisting of a number of link arms 7, 10 which, together with hydraulics and gravity, give a lever arm effect. The weight of the object 14 to be moved provides a clamping force against a tree, an electricity pylon or telephone mast 3. A motor drives a wheel 2 against the pole or tree 3, and the object 14 is easily moved from the bottom of the pole or tree to the top. <IMAGE> |
