Abstract: A system for levelling the column of a bucket truck, including a hydraulic cylinder, fulcrums for the cylinder located on a substructure, and a pedestal, and a pivot point for the pedestal allowing the column of the crane and a turntable to be positioned at 0° in relation to the horizontal plane, thereby increasing the working slope range both in the forward and backward direction up to 20° in relation to the chassis of the carrying vehicle.

Abstract: The present invention relates to an opening and closing latch for a compactor truck hopper that can be used with refuse compactor trucks. The latch for a compactor truck hopper comprises: two identical upper supports attached to the upper left and upper right parts of the container of the truck; to hook-shaped lower plates located in the lower left and lower right parts of the container of the truck, each plate being accompanied by a stud, a spring and securing elements. The hopper latch of the present invention facilitates refuse unloading, since when the hopper comes into contact with the lower part of the latch, the lower part of the latch automatically closes and when the hopper ceases to be in contact with the lower part pf the latch, the lower part of the latch automatically remains free to be opened. Furthermore, the hopper latch, according to the present invention, provides complete and correct closure of the hopper to prevent undesired spillage of leachates during refuse compaction.