Abstract: A machine for debranching living trees can move up and down the tree autonomously via a drive mechanism and has an upper cutting unit including three blades and below it a lower cutting unit including two blades. The in total five blades are arranged so that they cover the full girth of the tree. The two blades in the lower cutting unit are horizontally offset so that their end portions can overlap. To move the machine along the tree trunk there are two belt drives which press against the tree and are both driven by a single hydraulic motor. The upper cutting unit with its three blades can move horizontally as a whole, so that when the machine is moved and encounters thicker or slightly bent parts of the tree trunk it can give way in order to prevent the bark from being damaged by the blades.

Abstract: The invention relates to a traveling device, which can be preferably mounted on a vehicle, provided for completely removing and reducing the size of trees, particularly fruit trees, which are growing in a row, including their roots. The device comprises a cutting tool for reducing the size of the trees fed thereto, an ejector, which is mounted on the cutting tool and provided for ejecting the trees cut in the cutting tool, and a feed device that, in a direction of travel, is located in front of the cutting tool and provided for feeding the trees to be cut into the cutting tool. The feed device comprises two driven, vertical draw-in rollers, which are located close to the ground and form a gap. When operating the device, these rollers seize trees that are pushed down in the direction of travel, squeeze them inside the gap and push them toward the cutting tool. The feed device also comprises at least one driven clearing roller placed in the ground whereby being situated transversal to the direction of travel.

Abstract: The invention relates to a traveling device (12), which can be preferably mounted on a vehicle (10), provided for completely removing and reducing the size of trees (14), particularly fruit trees, which are growing in a row, including their roots. The device (12) comprises a cutting tool for reducing the size of the trees (14) fed thereto, an ejector (16), which is mounted on the cutting tool and provided for ejecting the trees (14) cut in the cutting tool, and a feed device (18) that, in a direction of travel (50), is located in front of the cutting tool and provided for feeding the trees (14) to be cut into the cutting tool. The feed device (18) comprises two driven, vertical draw-in rollers (22, 24; 60, 62), which are located close to the ground and form a gap (20). When operating the device (12), these rollers seize trees (14) that are pushed down in the direction of travel (50), squeeze them inside the gap (20) and push them toward the cutting tool.

Abstract: The invention relates to a pruning device for removing branches from living trees, comprising a cradle with drive means and pressure means for moving the pruning device along a tree trunk and with a sawing unit which has at least one branch saw which is arranged on the cradle in a fixed or displaceable manner. According to the invention, the branch saw is embodied in the form of a circular saw, on the periphery of which are arranged exclusively non-crossed saw teeth.