A portable sharpener for chains of chainsaws comprising sharpening means (2) and a coupling device (3).

The sharpening means (2) are configured to sharpen the teeth (102) of a chain (101) of a chainsaw.

The coupling device (3) supports the sharpening means (2) and is configured to be reversibly constrained to the chainsaw.

Furthermore, the coupling device (3) comprises a support structure (4) which has a first plate (4a) adapted to be arranged parallel to a main extension plane of a chain guide bar (100) of the chainsaw and a second plate (4b) configured to abut against the bar (100), in such a way as to be at least partly interposed between the bar and the chain (101).

The first and the second plate (4b) are arranged substantially in an L-configuration.

The coupling structure further comprises one or more attachment members (5) applied to the first plate (4a) and configured to constrain the support structure (4) to the bar (100) of the chainsaw.

The present general inventive concept is directed to a chainsaw sharpening device including a cutting tooth sharpener, a base coupled to the cutting tooth sharpener, a first side member coupled to the base and configured to face a first side of a chainsaw bar, a second side member coupled to the base and configured to face a second side of the chainsaw bar, and a guide member coupled to the base and configured to be slidable along a plurality of top plates of a respective plurality of cutting teeth of a saw chain mounted on the chainsaw bar, wherein the chainsaw sharpening device is configured to be moved to a desired cutting tooth of the mounted saw chain to perform a sharpening procedure without being fixed to the chainsaw bar.

A device for sharpening the cutting teeth of a chain saw includes a frame having an upper web and first and second side walls, and an open area defining a sharpening area. The device further includes at least one clamping member operable with at least one of the first and second sidewalls of the frame for securing the frame to the guide bar of the chain saw. The device still further includes a second clamping member movably supported about the frame, which operates to engage a chain saw tooth of a chain and to fix its position within the sharpening area. The second clamping member includes a tooth stop for adjusting the position of the chain saw tooth within the sharpening area. The tooth stop includes a pawl support block and a pawl having at least one working portion engageable with the chain at different positions along a lateral axis of the pawl support block to provide clearance for a sharpening tool within the sharpening area.

An operator operates a throttle lever and by maximizing the extent of said operation, the drive state is initiated, and the crank shaft rotation rate R increases and reaches the maximal value (RC) thereof. Subsequently, the operator operates the dressing operation lever so as to be in a second state at elapsed time (t0) while keeping the extent of the throttle lever operation maximized. Because a microswitch is turned off, the crank shaft rotation rate (R) is controlled in a range of R1<R<R2. By placing the saw chain in contact with a grindstone fixed to the dressing operation lever simultaneously with said action, dressing work is performed. After the microswitch is turned off at elapsed time (t0), the output of an ignition coil is controlled cyclically by a control unit at a cycle (T1+T2) so as to be on (ignition) during period (T1) and off (flame off) during period (T2).

Disclosed is a chainsaw workbench for safely controlling a chainsaw during sharpening of blades thereof. The chainsaw workbench includes a base placed on a fixed support; a first elevation platform attached to the base to rest the handle of the chainsaw; a second elevation platform attached to the base to rest the handle of the chainsaw; a first mount extending upwards from the base along the edge of the first elevation platform; and a second mount extending upwards from the base along the edge of the second elevation platform, wherein the distance between the first mount and the second mount is sufficient to receive the blade of the chainsaw; wherein the chainsaw blade rests on the first mount and the second mount. Further, the chainsaw workbench includes a tool box placed on the base to store tools. Furthermore, the chainsaw workbench includes a first screw to tight the first mount; and a second screw to tight the second mount.

A chain saw guide bar mounting device for facilitating maintenance of a cutting chain includes a first plate that is configured to mount to a support structure. A second plate that is coupled to the first plate extends longitudinally from proximate to a first end of the first plate. Each of a pair of couplers coupled to the second plate is configured to couple to a respective penetration that is positioned in a guide bar of a chain saw. A bracket, which is slidably coupled to the first plate, is positioned between the second plate and a second end of the first plate. A second rod is selectively couplable to the bracket. A hub is axially positioned on and rotationally coupled to the second rod. The hub is positioned to rotationally couple to a cutting chain that is positioned on the guide bar to position the cutting chain for maintenance.

A chainsaw cutting link (21) comprises: a base portion (29) provided with two rivets holes (20a, 20b) for pivotal inter-connection with adjacent links (13), and a cutting tooth (35) extending away from the base portion (29), wherein the cutting tooth (35) comprises a top plate (41) and a side plate (43) defining an angle to form an L-shaped cutting edge (45, 47, 49) facing in a cutting direction (B). The top plate (41) comprises a top plate cutting edge (45) which is sharper than at least a portion (53) of the side plate cutting edge (47).

A method is for determining a sharpness condition of a saw chain of a chain saw. The saw chain includes at least one cutting link having an upper cutting blade. An upper cutting blade image of the upper cutting blade of the cutting link is recorded using an imaging device. An evaluation of the upper cutting blade image is performed using an evaluation unit, which includes an artificial neural network. A sharp condition and a dull condition of the saw chain are defined in the evaluation unit. The saw chain is assigned on the basis of the upper cutting blade image using the artificial neural network to the sharp condition or the dull condition.

A method is for determining a sharpness condition of a saw chain of a chain saw. The saw chain includes at least one cutting link having an upper cutting blade. An upper cutting blade image of the upper cutting blade of the cutting link is recorded using an imaging device. An evaluation of the upper cutting blade image is performed using an evaluation unit, which includes an artificial neural network. A sharp condition and a dull condition of the saw chain are defined in the evaluation unit. The saw chain is assigned on the basis of the upper cutting blade image using the artificial neural network to the sharp condition or the dull condition.

Apparatus and associated methods relate to a chainsaw sharpening marker system configured to guide sharpening of each tooth using a series of aligned visual marks positioned on the teeth themselves. In an illustrative example, each cutting tooth on a chainsaw chain includes a sharpening marker including a set of marks etched at a predetermined angle that corresponds to the cutting angle of the tooth. The sharpening marker, for example, enables a user to visually align a sharpening tool during operation by referencing both the angle and position of the etched marks relative to the tooth's cutting edge. Various embodiments may advantageously ensure consistent angular sharpening and equal tooth length across alternating left- and right-facing teeth, improving straightness and precision in cutting performance.