There is provided maintaining, at a network service operatively connected to a logging machine, master forest resource information, wherein the master forest resource information comprises prediction cells for product yield over a work area or a set of work areas, receiving, at the network service from the logging machine, logging machine measurements associated with the work area or the set of work areas, associating, at the network service, the received logging machine measurements to at least one prediction cell of the master forest resource information, determining, at the network service, based on the received logging machine measurements, a logging machine product yield for the work area or the set of work areas, modeling, at the network service, a difference between the logging machine product yield and a product yield of the at least one prediction cell, and compensating, at the network service, product yields of prediction cells based on the modeled difference.

A device is mounted to the end of a log so that a skid steer may use the log to engage a tree targeted for felling. The device includes implements configured for engaging the target tree to be felled to give the operator of the device control over the target tree. The device is structured to push the target tree over such that the root ball of the target tree rises up out of the ground as the target tree is felled and/or to allow the operator to make cuts to the target tree before the device is use to push the tree in the desired direction of fell.

A device is mounted to the end of a log so that a skid steer may use the log to engage a tree targeted for felling. The device includes implements configured for engaging the target tree to be felled to give the operator of the device control over the target tree. The device is structured to push the target tree over such that the root ball of the target tree rises up out of the ground as the target tree is felled and/or to allow the operator to make cuts to the target tree before the device is use to push the tree in the desired direction of fell.

A sprocket arrangement (5) for a handheld power tool such as a saw, comprising a drive unit configured to rotate a drive shaft and cutting tool configured to be driven by the drive shaft (21) via the sprocket arrangement. The sprocket arrangement (5) comprises a gear (1) and at least one flexible element (6a, 6b) arranged such that the drive shaft (21) in the handheld power tool is resiliently connected to the cutting tool in the handheld power tool. A handheld power tool comprising a drive unit, a drive shaft, driving means, and a sprocket arrangement is also provided.

A sprocket arrangement (5) for a handheld power tool such as a saw, comprising a drive unit configured to rotate a drive shaft and cutting tool configured to be driven by the drive shaft (21) via the sprocket arrangement. The sprocket arrangement (5) comprises a gear (1) and at least one flexible element (6a, 6b) arranged such that the drive shaft (21) in the handheld power tool is resiliently connected to the cutting tool in the handheld power tool. A handheld power tool comprising a drive unit, a drive shaft, driving means, and a sprocket arrangement is also provided.

A cutting tooth system for a disk of a disk-saw felling head. The disk defines a receiving portion and an axis of rotation. The cutting tooth system comprises at least one cutting tooth. The cutting tooth comprises a first portion defining a first protrusion and a second protrusion. The first portion is configured to be received in the receiving portion for rotation with the disk. A second portion defines a chip removal path and a cutting edge adjacent the chip removal path. A first retaining device is configured to couple to the disk to secure the first protrusion in the receiving portion. A second retaining device is configured to couple to the disk to secure the second protrusion in the receiving portion.

A method for handling logs, wherein the method comprises the following steps: retrieving or generating a unique code at a first moment; establishing, by means of a position determining device, position information as to the geographical position of a portable, hand-held log marking tool (1) at said first moment; applying the code as a corresponding code marking on a log by means of the log marking tool at a second moment and automatically establishing a time value representing the time elapsed between said first moment and said second moment; comparing said time value with a predetermined time threshold value; andstoring the code as an authenticated code in a database associated to the position information when said time value is smaller than the time threshold value. The invention also relates to a log marking tool (1) for use in such a method.

A work vehicle includes a pin connected to a stick boom at a location remote from a hoist boom. The pin has an envelope throughout which the pin is moveable by the hoist boom and the stick boom. A controller can receive a first signal from a hoist boom sensor, receive a second signal from a stick boom sensor, and receive input from a user interface. The controller can inhibit movement of the pin to at least one portion of the envelope, thereby permitting movement throughout a movement envelope, the movement envelope being smaller than the envelope. The controller can operate in a first operation mode when the pin is spaced from a perimeter of the movement envelope and can operate in a second operation mode when the pin is proximate the perimeter of the movement envelope.

A remote-controlled robotic equipment for tree pruning near energized power lines, which, provides a remote-controlled robotic equipment in its own, specific electromechanical structure coupled to a truck and based on a robotic arm with a stand, a positioner, a handler and an end effector-pruning tool, a collection bin and a tree branch shredder, which are all integrated, for robotized tree pruning near energized power lines, which can conveniently, safely and precisely streamline the procedures adopted in the maintenance of aerial electric power distribution networks, more specifically, tree pruning near urban electric power distribution networks, combined with full ergonomics and no exposure of operators.

A remote-controlled robotic equipment for tree pruning near energized power lines, which, provides a remote-controlled robotic equipment in its own, specific electromechanical structure coupled to a truck and based on a robotic arm with a stand, a positioner, a handler and an end effector-pruning tool, a collection bin and a tree branch shredder, which are all integrated, for robotized tree pruning near energized power lines, which can conveniently, safely and precisely streamline the procedures adopted in the maintenance of aerial electric power distribution networks, more specifically, tree pruning near urban electric power distribution networks, combined with full ergonomics and no exposure of operators.