Abstract: The invention concerns a suspension device for a tracked vehicle, comprising a track assembly (10) at the side of a centre beam (14), comprising a track support beam (20), two wheels (21, 22), several support wheels (23) and an endless track (11) that runs in a plane of rotation (A, A), a first suspension mounting with which the support wheels (23) are suspended at the track support beam (20) in a manner that allows pivoting, a second suspension mounting comprising a combination of a first spring strut (25A) and a first pendulum arm (26A) and a second spring strut (25B) and a second pendulum arm (26B) with which combinations the centre beam (14) of the chassis is spring-damped at a forward and rear end of the track support beam (20).

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 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: In a device and a method for a tree harvester head for trimming tree trunks, the device includes a frame (1) supporting feed rollers (2), one or more trimming knives (4) that pivot towards and away from the tree trunk, as well as a trimming knife (6) permanently fixed to the frame (1) and with a radius of curvature that is essentially equivalent to the radii of curvature of the pivoting trimming knives (4).

Abstract: The invention relates to a device and a method for a tree harvester head for trimming tree trunks. The device includes a frame (1) supporting feed rollers (2), one or more trimming knives (4) that pivot towards and away from the tree trunk, as well as a trimming knife (6) permanently fixed to the frame (1) and with a radius of curvature that is essentially equivalent to the radii of curvature of the pivoting trimming knives (4).