A chainsaw limb gripping attachment system comprising a chainsaw comprising a motor with a handle configured for holding by a user, and a blade configured to extend away from the motor, the blade comprising a guide bar and a plurality of cutting teeth positioned around a periphery of the guide bar and configured to rotate; and a gripper bar comprising a center section removably attached to the guide bar, an upper section extending upwardly from the center section, and a lower section extending downwardly from the center section. The gripper bar comprises a first gripping section on a proximal edge of the upper section, the first gripping section comprising a first plurality of teeth. The gripper bar further comprises a second gripping section disposed on a distal edge of the lower section, the second gripping section comprising a second plurality of teeth.

A method and apparatus for vertically felling of trees are provided by taking apart the trunk in a stepwise manner combining sagittal and horizontal cross-sections. A vertical frame is attachable to a tree trunk, the vertical frame having a movable portion and a fixed portion. A first cutting device is attachable to the vertical frame and configured to cut the tree sagittally substantially along a longitudinal axis of the tree. A second cutting device is attachable to the vertical frame and configured to cut the tree horizontally from an exterior of the tree to a sagittal cut made in the tree by the first cutting device. A locking mechanism releasably locks the movable portion of the frame to the fixed portion of the frame. The apparatus uses the weight of the upper trunk to maintain stability to steadily decrease the tree height until the entire tree is removed.

A method and apparatus are provided for vertically felling trees by taking apart the trunk in a stepwise manner combining sagittal and horizontal cross-sections. A vertical frame is attachable to a tree trunk, the vertical frame having a movable portion and a fixed portion. A first cutting device is attachable to the vertical frame and configured to cut the tree sagittally substantially along a longitudinal axis of the tree. A second cutting device is attachable to the vertical frame and configured to cut the tree horizontally from an exterior of the tree to a sagittal cut made in the tree by the first cutting device. A locking mechanism releasably locks the movable portion of the frame to the fixed portion of the frame. The apparatus uses the weight of the upper trunk to maintain stability to steadily decrease the tree height until the entire tree is removed.

A stop has an elongate form between a base and a tip, with the base configured to be attachable to a chainsaw bar closer to a free end of the bar then to a housing of the chainsaw to which the bar is mounted. The stop extends below a lower edge of the bar. Bolts or other fasteners pass through holes in the stop and through holes in the bar for attachment. Positioning of the stop separates a tip space from a main space where chain teeth can cut wooden material. Smaller branches can conveniently be cut in the tip space while larger wooden material can be cut in the main space. The stop is configured to include clearance for the chain to pass thereby, such as by including standoffs in the stop adjacent to holes at the base, or by providing a clearance groove or clearance bend.

A cutting tool that contains the cutting forces within its assembly. The cutting tool includes an outside housing that attaches multiple jaws, attachment points for jaw clamping, anchor point to secure clamping forces, a bearing surface to allow saw bar movement, handles for user movement, and protection for internal components used in its operation. The jaws include interlocking gears to synchronize rotation, cross bracing, jaw clamping attachments points, and tie-offs for hoisting rope. The saw bar and chain electric motor attach to a rotation tube that is rotated by a worm gear situated at opposite end. Electrical power contained within the main housing is transferred to electrical chain motor using an electric rotary joint. The electric batteries and electric motor controller, electrical power switch and electrical fuse is contained within the main housing. Electro-pneumatic valves are situated in a separate housing and used for chain motor activation.

A stop has an elongate form between a base and a tip, with the base configured to be attachable to a chainsaw bar closer to a free end of the bar than to a housing of the chainsaw. The stop extends below a lower edge of the bar. Fasteners pass through holes in the stop and through holes in the bar for attachment. Positioning of the stop separates a tip space from a main space where chain teeth can cut wooden material. Smaller branches can conveniently be cut in the tip space while larger wooden material can be cut in the main space. The stop is configured to include clearance for the chain to pass thereby, such as by including standoffs adjacent to holes at the base, or by providing a clearance groove or bend. The stop can include a hook to facilitate engagement with and moving of small objects.

A machine tool system comprises at least one portable machine tool and at least one separating device for a machine tool, which includes at least one cutting strand and at least one guide unit for guiding the cutting strand, said guide unit forming with the cutting strand a closed system. The machine tool system comprises at least one cutting edge guide unit.

A vegetation pruning device includes a pair of pivotably coupled handles and a motor having a rotary output drive for driving an endless flexible cutting chain. A guard is moved relative to the chain by pivoting of the handles relative to each other to grip vegetation between the guard and the chain. The motor is actuated by pressing each of a pair of elongate triggers at any position along the length of the triggers.

A machining tool, in particular to a rotating cutter machining tool, includes at least one cutting strand and at least one cutting strand-guiding unit. The machining tool also includes at least one cutting edge-guiding unit disposed on the cutting strand-guiding unit. The cutting edge-guiding unit has a maximum transverse extension that is equal to or greater than a maximum cutting width of the cutting strand.

An outdoor tool includes a powerhead, a tool unit powered by the powerhead, and a shaft assembly extending between the powerhead and the tool unit. The tool unit includes a transmission housing, a support plate, a guide bar adjustably supported by the support plate, a drive gear, and a chain circumscribing a portion of the drive gear and a portion of the guide bar, the drive gear operatively coupled to the powerhead. The tool unit further includes a tension adjustment mechanism for adjusting a position of the guide bar relative to the drive gear to increase and decrease a tension in the chain. The tension adjustment mechanism includes an adjustment screw, a threaded adjustment bolt, at least one adjustment gear, and a member coupled to the adjustment bolt and the guide bar. Rotation of the adjustment screw causes translation of the guide bar relative to the drive gear.