The present invention concerns a method for the lateral levelling equipment of a timber working head at a forestry machine with a hydraulic system for the driving and regulation of the functions of the forestry machine, which forestry machine comprises a chassis with a driver's cabin and an arm to which a timber working head is fixed jointed and in a manner that allows rotation, the working head comprising levelling equipment and a regulator for the control and regulation of the lateral angle of the working head relative to the vertical direction, an arrangement for the execution of the method, and a forestry machine for the use of the arrangement during the execution of the method.

An implement system for a machine. The implement system includes a boom, an implement, a roller assembly and a carriage. The boom has a telescopic structure and a first end. The implement is coupled to the first end of the boom. The roller assembly is configured to be coupled to the machine. The carriage is engaged with the roller assembly and is coupled to the boom. The carriage is configured to move linearly along a longitudinal axis of the machine between a first position and a second position.

A double cut control system and method are disclosed for a felling head having a saw disc. The felling head may be positioned by a knuckle boom, which includes a hoist boom and a stick boom coupled by a knuckle and positioned by hydraulic cylinders actuated by a hydraulic pump and hydraulic control valves. The control system has an operator input device for input of operator commands including a double cut control input command. Position sensors provide position values for the knuckle boom and the felling head. At least one controller receives the operator commands and position values. After receiving the double cut control input command, the controller generates a first cut control signal to direct flow of hydraulic fluid to the hydraulic cylinders to position the knuckle boom to advance the felling head in a single fore-aft direction a set distance corresponding to a partial depth cut.

A double cut control system and method are disclosed for a felling head having a saw disc. The felling head may be positioned by a knuckle boom, which includes a hoist boom and a stick boom coupled by a knuckle and positioned by hydraulic cylinders actuated by a hydraulic pump and hydraulic control valves. The control system has an operator input device for input of operator commands including a double cut control input command. Position sensors provide position values for the knuckle boom and the felling head. At least one controller receives the operator commands and position values. After receiving the double cut control input command, the controller generates a first cut control signal to direct flow of hydraulic fluid to the hydraulic cylinders to position the knuckle boom to advance the felling head in a single fore-aft direction a set distance corresponding to a partial depth cut.

The present disclosure relates to a chain saw of a wood handling device and to controlling the guide bar in it. The guide bar is attached to a turning frame rotatably arranged to a frame of the chain saw through a fastening arrangement. The fastening arrangement of the guide bar and the turning frame are joined by at least one guide for controlling the guide bar during movement along its longitudinal axis. The guide includes opposite slide guides with opposite sliding and mating surfaces that form a form-locking joint joining the fastening arrangement and turning frame together. This type of separate slide guide arranged in the chain saw is movable in at least one direction differing from the direction of travel allowed by the guide, which makes it possible to modify clearance between the sliding surface and mating surface.

The present disclosure relates to a chain saw of a wood handling device and to controlling the guide bar in it. The guide bar is attached to a turning frame rotatably arranged to a frame of the chain saw through a fastening arrangement. The fastening arrangement of the guide bar and the turning frame are joined by at least one guide for controlling the guide bar during movement along its longitudinal axis. The guide includes opposite slide guides with opposite sliding and mating surfaces that form a form-locking joint joining the fastening arrangement and turning frame together. This type of separate slide guide arranged in the chain saw is movable in at least one direction differing from the direction of travel allowed by the guide, which makes it possible to modify clearance between the sliding surface and mating surface.

The present disclosure relates to an arrangement for transferring fluid to a guide bar in a chain saw. A channel can extend from a chain saw body to the fastening arrangement of the guide bar. The channel can include a cavity through the entire channel, a first end of the cavity being connected to a feed channel provided in the chain saw body and a second end thereof to a counter channel provided in the fastening arrangement. The counter channel, in turn, is arranged to extend to the guide bar. The channel is thus arranged to guide fluid flowing in the feed channel provided in the chain saw body through the channel and further through the counter channel provided in the fastening arrangement to the guide bar.

The present disclosure relates to an arrangement for transferring fluid to a guide bar in a chain saw. A channel can extend from a chain saw body to the fastening arrangement of the guide bar. The channel can include a cavity through the entire channel, a first end of the cavity being connected to a feed channel provided in the chain saw body and a second end thereof to a counter channel provided in the fastening arrangement. The counter channel, in turn, is arranged to extend to the guide bar. The channel is thus arranged to guide fluid flowing in the feed channel provided in the chain saw body through the channel and further through the counter channel provided in the fastening arrangement to the guide bar.

An aerial vegetation trimming system. The aerial vegetation trimming system may include a saw assembly, wherein the saw assembly may include a plurality of saw blades disposed along a length of a beam. The aerial vegetation trimming system may further include an electric motor operatively connected to the saw assembly, wherein the electric motor is configured to drive the plurality of saw blades; and at least one boom disposed between the electric motor and a vehicle, wherein the at least one boom is configured to connect the saw assembly to the vehicle.

A machine operates in conjunction with an aircraft, such as a helicopter, for harvesting or removing trees. The device can be powered by the aircraft, by electrical or hydraulic connection with the aircraft, or it may have an independent, self-contained power source. The device includes jaws for grasping a tree, and a saw for cutting the tree. The weight of the device is borne by a strong and flexible cord suspended from the aircraft. Various motors enable the position of the device to be remotely controlled, so as to grasp and remove tree trunks. The invention is especially useful for removing trees from areas which are difficult to reach by land.