| 摘要 |
1,020,691. Concrete levelling apparatus. G. BESSE. June 25, 1964 [June 26, 1963], No. 26250/64 Heading E1G. Concrete levelling apparatus comprises a frame 1a moved by a tow-bar 3 and bearing a rocking adjustably loaded levelling blade 5, a set of perforated smoothing cylinders 15, 16 and a rocking adjustably loaded smoothing blade 11, one or more vibrators 20 being mounted above the cylinders. The blades 5 and 11 are loaded by weights 6, 12 adjustable along rods 7, 13 and may be hooked, as at 14, out of contact with the concrete surface. The apparatus may travel with the cylinders 15, 16 rolling on side shuttering and the blade 5 may be U-shaped to clear excess concrete to the sides. |
