Abstract: The invention relates to a method of cleaning stumps from adherent impurities such as soil, stones, litter or the like and a device for carrying the method into effect. The object of the invention is to realize a more efficient and economical cleaning of stumps by grasping and retaining the stump by a gripping means, lifting up and bringing the stump to swing to and fro in order to strike against an out-of-phase pendulating or driven device whereby impurities are shaken off.For carrying out the method a device is proposed including a gripping means which is articulated in or adjacent impact means, such as a frame or the like, and driving means adapted to set the frame swinging such that the stump grasped by the gripping means shaken by repeated impacts with the frame throughout the driving operation, whereby the impurities are shaken off.

Abstract: A standing tree is gripped by a gripping device, lifted and separated from its root system by a cutting device acting in parallel with the longitudinal direction of the tree, the roots being separated from its trunk accelerating the cutting device vigorously relative to the gripping device in the direction away from it, while storing a substantial amount of kinetic energy in the considerable mass cutting parts which in conjunction with the mass of inertia of the tree is used for the cutting of the roots of the tree.