Abstract: A system includes: a detection means that detecting the weight of the load that is being manipulated is integrated into a load-sensitive guide pin that forms part of the axle bearing and that can output a signal that is proportional to the effect that is caused by the load, a power source to provide driving power for the load-sensitive guide pin, a sensor cable for the transfer of a driving voltage from the power source to the load-sensitive guide pin, a calculation means that is in signal-transfer connection with the load-sensitive guide pin in order to calculate the weight of the load that corresponds to the signal from the load-sensitive guide pin.

Abstract: The invention concerns an arrangement to capture passively a broken saw chain of a chain saw with a guide bar that is arranged such that it can pivot, comprising a stationary screen that forms part of a sawing box and that covers a rear part of the saw. In order to achieve a cheap and efficient protection there is arranged between an end surface of the screen and the guide bar an energy-absorbing brake member that is sufficiently elastic or flexible to receive the kinetic energy from a broken saw chain, to direct kinetic energy away from the chain and to regain its normal form after it has suffered an impact from and been deformed by the chain.

Abstract: The invention concerns a method for a sawchain and a sawchain. According to the method according to the invention, a sawchain intended to be used for a sawing arrangement for a forestry harvester in order to prevent the whip-like movement of a sawchain that breaks during sawing, is achieved through a method that comprises the steps: —that the sawchain (1) is provided with a means (20) of limiting pivoting that allows a forwardly located link (3, 4, 5, 2) of the sawchain to pivot in a first direction relative to the subsequent link (3, 4, 5, 2) while limiting the ability of the forwardly located link to pivot in an opposite second direction relative to the subsequent link, —that the sawchain (1) is driven around a guide bar (9) with the aid of a driving wheel that is located at one end of the guide bar, —that sawing of a tree trunk is carried out through the guide bar (9) being turned around an axis of rotation.

Abstract: The invention concerns to a method and arrangement for a suspension system that may be constituted by a harvesting trait of a forestry harvester and which suspension system is of the type that has a wheel supported and provided with an angle sensor in order to form a measurement wheel for the measurement of length, with an arm pivotably attached to a frame in such a manner that the wheel can be adjusted from positions in contact with and out of contact with a surface of the object whose length is to be measured while the object is fed in its longitudinal direction past the measurement wheel running against the circumference of the measurement wheel, whereby the said object may be constituted by a tree trunk taken up into a harvester unit.

Abstract: The invention concerns a method for a sawchain and a sawchain. According to the method according to the invention, a sawchain intended to be used for a sawing arrangement for a forestry harvester in order to prevent the whip-like movement of a sawchain that breaks during sawing, is achieved through a method that comprises the steps:—that the sawchain (1) is provided with a means (20) of limiting pivoting that allows a forwardly located link (3, 4, 5, 2) of the sawchain to pivot in a first direction relative to the subsequent link (3, 4, 5, 2) while limiting the ability of the forwardly located link to pivot in an opposite second direction relative to the subsequent link,—that the sawchain (1) is driven around a guide bar (9) with the aid of a driving wheel that is located at one end of the guide bar,—that sawing of a tree trunk is carried out through the guide bar (9) being turned around an axis of rotation.

Abstract: The invention concerns a method and an arrangement for a suspension system that may be, but does not necessarily need to be, constituted by a harvesting unit of a forestry harvester and which suspension system is of the type that has an arm (2) on which a wheel (4) is supported and provided with an angle sensor (4a) in order to form a measurement wheel for the measurement of length, and which arm is attached in a manner that allows it to pivot to a frame (3) in such a manner that the wheel can be adjusted from positions in contact with and out of contact with a surface (5) of the object whose length is to be measured while the object is fed in its longitudinal direction (5a) past the measurement wheel running against the circumference of the measurement wheel, whereby the said object may be, but does not necessarily need to be, constituted by a tree trunk taken up into a harvester unit.

Abstract: A drive of mounting a rotating implement to a crane arm or similar, comprises a rotator located between the crane arm and the unit that at one end is pivot-mounted to the implement for rotating the same relative to the crane arm and slewing around a first pivot axis and at the other end is mounted to the crane arm via a hinged link for slewing around a second pivot axis, a swivel coupling arranged on the rotator for supplying the working chambers of a drive for the rotator and any other consumers included in the unit with a hydraulic medium and that to one end of the swivel coupling is arranged connecting unions, to which hydraulic medium lines leading from the crane arm are attached.