Abstract: A hand-held electric chainsaw includes a housing, a chain guide, a saw chain, a motor, a hand guard, a protective cover, and a stop pin. The housing includes a grip section. The chain guide is connected to the housing. The saw chain is movable circumferentially along the periphery of the chain guide. The motor is drivingly connected with the saw chain. The hand guard is connected to the housing and disposed between the grip section and the saw chain. The protective cover covers and is located outside a part of the saw chain that moves from the housing in a direction away from the housing. The stop pin is disposed between the saw chain and the grip section, located outside a part of the saw chain that moves in a direction toward the housing, and oriented perpendicular to a circumferential movement direction of the saw chain.

Abstract: A chainsaw including a body including a bar stud extending therefrom; a guide bar including a bar stud slot that receives the bar stud, wherein the bar stud slot has a length, and wherein the guide bar is configured to receive a chain; a yoke having a groove defining a length extending in a direction angularly offset from the length of the bar stud slot of the guide bar, wherein the yoke is coupled to the guide bar; a ratchet gear including a one-way motion feature and a post extending into the groove of the yoke, wherein rotating the ratchet gear in a first direction moves the guide bar to tighten the chain, and wherein rotating the ratchet gear in a second direction moves the guide bar to loosen the chain; and a pawl selectively engaged with the one-way motion feature of the ratchet gear.

Abstract: A cutting device includes a housing formed with a handle portion and an accommodation portion, a cutting portion connected to the housing and at least partially disposed in the accommodation portion, a motor disposed in the accommodation portion and extending in a first linear direction, and a bottom plate extending in a plane of the bottom plate and formed with an opening through which at least part of the cutting portion passes. The cutting device further includes a worm gear and worm structure disposed in the accommodation portion. The cutting portion includes a chain and a guide plate connected to the housing and used for supporting the chain. The motor includes an output shaft, the cutting portion is connected to a driving shaft, the output shaft transmits power to the driving shaft through a worm gear and a worm, and the driving shaft is capable of driving the chain.

Abstract: A chainsaw having a scraper used to clean or debark wood before a saw chain makes a cut is disclosed. The chainsaw includes a housing, a first casing and a second casing coupled to the housing. The first casing has a plurality of first spikes and the second casing has a plurality of second spikes. Further, the chainsaw includes a guide bar coupled to the housing. Additionally, the chainsaw includes a saw chain provided around the guide bar. The chainsaw further includes a scraper coupled to the first casing and the second casing. The scraper is aligned in axis with the saw chain. The scraper is used to clear dirt or debark on wood before the saw chain makes a cut on the wood. Thereby, protecting the teeth of the chain of the chainsaw as to extend its lifespan and require less sharpening of the teeth of the chain.

Abstract: A safety system for a power tool having a motor and a cutting tool driven by the motor includes a control device configured to detect a direct contact of a conductive material with the cutting tool, the direct contact of the conductive material with the cutting tool defining a contact event, and a braking device movable between a retracted position and an engaged position. The control device is configured to interrupt electrical power to the motor and control the braking device to the engaged position when the contact event is detected.

Abstract: A battery-powered portable cutting tool includes a housing, a cutting element, an electric motor to drive the cutting element to cut, a battery to supply electric current to the motor and a control circuit to control the supply of electric current to the motor from the battery. The control circuit may include a main switch and an auxiliary switch. The control circuit may have an active state in which the main switch allows electric current to flow to the motor and an inactive state in which the main switch does not allow electric current to flow to the motor. The operation of the auxiliary switch causes the control circuit to change between the active and inactive states. The auxiliary switch is arranged to determine whether the tool is in an inappropriate state to be used and, if so, cause the control circuit to change to the inactive state.

Abstract: The invention relates to a work device with a guide rail (4) on which a chain (5) is driven in a circulating manner. The work device has a clamping device (15) for the chain (5). The clamping device (15) has a clamping element (16) which acts on en the guide rail (4) in the direction (19) of the longitudinal central axis (18) of the guide rail (4). The clamping device (15) has a rotatably mounted adjusting element (17) which is connected to the clamping element (16) via a threaded connection (20). A rotation of the adjusting element (17) about its rotational axis (21) causes a movement of the clamping element (16) in the direction (19) of the longitudinal central axis (18) of the guide rail (4). The outer circumference of the adjusting element (17) has a threaded portion (22) with at least one turn (23), said threaded portion being provided for engaging with at least one threaded portion (24) of the clamping element (16).

Abstract: A drive assembly has a drive motor at least in part contained in a housing and having a rotor rotating an output shaft. A selector mechanism is movable into one of a plurality of orientations corresponding to one of a plurality of drive motor settings. A brake assembly is configured to couple to the rotor of the drive motor and is moveable between a braked position in which the brake assembly impedes rotation of the rotor and a released position in which the brake assembly allows rotation of the rotor. An actuator is arranged in the housing to engage the brake assembly at least when the brake assembly is in the braked position and to engage the selector mechanism at least when the brake assembly is in the released position.

Abstract: 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.

Abstract: A chain saw includes a wheel and a chain plate exposed to a saw casing, a chain trained over the wheel and the plate, and a driving device for driving the wheel. The plate is formed with an elongated slot. A chain tension adjustment mechanism includes a shielding cover disposed between the casing and the plate; a slide element disposed movably between the plate and the shielding cover, has a protrusion extending through the slot in the plate; and a biasing member biasing against the slide element and the shielding cover so as to push the slide element away from the wheel, wherein, movement of the plate toward the wheel against biasing action of the biasing member results in retraction of the biasing member from its initial shape and pressing the slide element toward the wheel, thereby releasing the chain from the plate and the wheel and vice versa.

Abstract: A power-tool system includes at least one power-tool parting device including at least one cutting strand and at least one guide unit configured to guide the at least one cutting strand. The power tool system further includes at least one portable power tool including (i) a housing, (ii) a drive unit supported by the housing, (iii) at least one coupling device configured to operatively connect the at least one power-tool parting device to the drive unit, and (iv) at least one power-tool stabilization device including at least one stabilization element that is integrally formed with the housing and defines at least one support face configured to stabilize the at least one power-tool parting device.

Abstract: A safety system in a portable tool (1) includes a pair of electrodes connected to a measurement and assessment unit, the measurement and assessment unit being an integrated circuit touch sensor device provided with a ground connector and with a sense electrode, wherein the ground connector is configured as internal floating ground connected to one electrode, the measurement and assessment unit configured for acquiring a reference capacity value measured between the two electrodes varies by a preset difference threshold with respect to the reference value, the safety signal being sent to a tool deactivation actuator.

Abstract: A chainsaw having improved cutting workability is provided. A chainsaw is used to cut an object to be worked by a saw chain. A chainsaw main body is provided with an electric motor and a sprocket, and a guide bar around which the saw chain is wound is provided on the chainsaw main body. The guide bar is attached to the chainsaw main body by a screw member serving as an attaching member. A load sensor detects whether or not the guide bar is attached to the chainsaw main body. Rotation of the saw chain is prohibited based upon a signal from the load sensor when the guide bar is not attached to the chainsaw main body.

Abstract: A chainsaw may include a guide bar, a cutting chain and a driving unit arranged to drive the cutting chain around the guide bar. The guide bar defines a first longitudinal axis extending along a center of the guide bar. The chainsaw further comprising a handle section for carrying and operating the chainsaw, wherein the handle section includes a control portion disposed on the upper side of the chainsaw. The control portion in turn includes a throttle lever for controlling the speed of the driving unit and the control portion has a left and a right side. The control portion defines a second longitudinal axis substantially extending along an upper side of at least a part of the control portion. An angle, A, between the first and the second longitudinal axes is between 14° and 45°.

Abstract: The invention relates to a chainsaw having a front hand guard (20) including a protective structure (21), projecting in front of the front handle (5), pivotally attached to the engine housing (2) by at least one lever (25, 26) for activating a brake to brake the movement of the saw chain when being pivoted. The protective structure (21) includes see through means (24) enabling at least partial visibility through the protective structure (21), and twig preventing means for limiting the risk of objects such as twigs to get stuck in the protective structure (21).

Abstract: A hand-operated implement has a guide bar on which is fitted a cutting chain for cutting mineral and metal materials. The cutting chain is driven around the guide bar by a chain sprocket. The chain sprocket is arranged in a chain sprocket chamber which is delimited by a chain sprocket cover. A cutting element has an outer side facing a sidewall of the chain sprocket cover which lies in a first notional plane. The distance between the sidewall and the first notional plane measured perpendicular to the first notional plane and centrally between the top of the cutting element and the peripheral wall is less than approximately 0.8 cm over at least 30% of the section between a second notional plane containing the central axis of a fixing bolt on the guide bar and the exit opening at which the cutting chain leaves the chain sprocket chamber.

Abstract: The present disclosure relates to a chainsaw having a front hand guard including a protective structure, projecting in front of the front handle, pivotally attached to the engine housing by at least one lever for activating a brake to brake the movement of the saw chain when being pivoted. The protective structure includes see through means enabling at least partial visibility through the protective structure, and twig preventing means for limiting the risk of objects such as twigs to get stuck in the protective structure.

Abstract: A portable working machine according to the present invention has a cover member detachably attached to a working machine body, includes a bolt member vertically provided to a working machine body, a detachable cover member having a through-hole and attached to the working machine body by inserting the bolt member through the through hole, a fixing member which is screwed with the bolt member and fixes the cover member to the working machine body, and a holding member which is attached to an outer surface of the cover member while having a predetermined gap space between the holding member and the outer surface of the cover member and holds the fixing member on an outer side of the cover member to prevent drop of the fixing member of which fastening to the bolt member is released.

Abstract: A chain saw hazard warning light and method for using same. A pair of oppositely-directed light sources emit light beams throughout a chain shot hazard warning zone through rectilinear, slotted openings at opposite ends of a housing. The light beams turn on, if and only if, the cutting chain is rotating about the chain guide bar; alternatively, initiation of rotation of the cutting chain is delayed to permit the light beams to turn on some time prior thereto. The zone is defined by first and second pairs of planes that diverge in opposite directions from the chain guide bar, said planes being disposed at equal, acute angles (most preferably 15°) to, and on opposite sides of, a plane that includes the chain guide bar.

Abstract: An electric power tool has an electric motor disposed in a main body and a power supply circuit electrically connected to the electric motor by wires to supply electric power to the electric motor. A switch is disposed in the power supply circuit so as to electrically open and close the power supply circuit. A movable member is supported by the main body, a detector is disposed in the main body to detect a movement of the movable member and the switch is configured to electrically open the power supply circuit when the detector detects the movement of the movable member. The wires connected to the electric motor are not connected to the detector so that the length of the wires is shortened.

Abstract: A battery-powered portable tool, such as a chainsaw, hedge trimmer or handheld drill, comprising: a housing (1), a driven element (2) supported by the housing (1), an electric motor (6) coupled to the driven element (2) so as to drive the driven element (2), a battery (5) electrically coupled to the motor (6) so as to supply electric current to the motor (6) and a control circuit (8) arranged to control the supply of electric current to the motor (6) from the battery (5), in which the control circuit (8) comprises a main switch (8) operable by a user and an auxiliary switch (10, 11) also operable by a user; in which the control circuit (8) has: an active state in which operation of the main switch (8) by the user allows electric current to flow to the motor (6) so as to cause the driven element (2) to be driven; and an inactive state in which operation of the main switch (8) does not allow electric current to flow to the motor (6) and so the motor (6) does not drive the driven element (2); in which operation

Abstract: A chain guard for a motor-driven chain saw has a narrow casing with a front end and a back end. The casing has two parallel side walls and an upper wall and a lower wall connecting the side walls to each other. The casing is closed at the front end thereof and defines an opening at the back end. A device is provided on the casing for attaching the chain guard to the clothing of the operator, a rope, a carabiner or the like.

Abstract: A brake assembly (1) for a hand-held power-driven cutting device (2) is provided comprising a movably arranged lever (14), at least being movable between a first- and a second position, a brake member (16), and a brake element (20) connected to or forming one unit with a rotatable part (22) of a transmission of the cutting device (2), wherein the brake member (16) is movable between a non-activated position and an activated position, and wherein the brake member (16) is arranged to engage with the brake element (20) in the activated position to prevent rotation of the rotatable part (22).

Abstract: The invention relates to a handheld work apparatus having a handle. A throttle trigger and a throttle trigger lock are arranged on the handle. An operating-mode selector having an off position, an operating position and a starting position is provided. The selector, trigger lock and the trigger are pivotally mounted. A first latching element is provided on the selector and a second latching element is provided on the trigger element, which coact in the starting position of the selector and the starting position of the trigger and hold the trigger in its starting position. To ensure that the starting position of the selector can only be engaged when the trigger is actuated, the second latching element lies outside of the pivot path of the first latching element in the non-actuated position of the trigger.

Abstract: A hand-guided power tool has a drive motor and a drive element connected to and driven by the drive motor. A working tool is connected to the drive element and driven by the drive element. A braking device is correlated with the drive element, wherein the braking device in a first state, in which the braking device is applied, blocks the drive element and in a second state, in which the braking device is released, releases the drive element so that the drive elements can rotate freely. The braking device has a brake lever and a sensor that detects the first and second states of the braking device. A control unit is provided, wherein an output signal of the sensor as a state signal of the first state or the second state is supplied to the control unit. The control unit, based on the state signal, controls devices of the power tool.

Abstract: An attachment for a chainsaw has a lock strip aligned with and near the bottom edge of the chain bar. A plurality of substantially C-shaped stop members engage non-circular indentations formed in the lock strip with one leg and the opposite side of the chain bar with the other leg. The substantially C-shaped stop members are large enough to go around the chain without touching the chain and to block brush and small limbs from being dragged by the chain into the housing. A tightening screw is associated with each of the plurality of substantially C-shaped stop members for holding the C-shaped stop member in a tight relationship with both the lock strip and the chain bar.

Abstract: The application relates to a chain guard for a chainsaw with interchangeable cutting attachments of different lengths, said cutting attachments having cutting chains, wherein the chain guard comprises an insertion opening for inserting a cutting attachment, at least two side walls for covering lateral surfaces of the cutting attachment, a front end opposite the insertion opening, a first latching depression formed in at least one side wall, and a second latching depression formed in at least one side wall at a distance closer toward the insertion opening with respect to the first latching depression, wherein the first latching depression and the second latching depression each comprise an arcuate latching surface for latching in a form-fitting manner with a cutting chain of the cutting attachment, said latching being active in the direction of a longitudinal axis of the chain guard, and also to a chainsaw system having such a chain guard.

Abstract: A safety apparatus for a portable tool having an internal combustion engine has at least one accelerometer providing a measurement of an acceleration of the portable tool in at least one plane or axis. An electronic controller is connected to an output of the accelerometer so as to receive analog or digital information. A generator is driven by the internal combustion engine so as to supply power to the accelerometer. A management card processes the analog or digital information so as to activate the system acting on an ignition exciter box so as to nearly instantaneously stop the internal combustion engine when the acceleration of the portable tool exceeds a predetermined level.

Abstract: In a chain saw, the tension of a saw chain attached around the outer edge of a guiding bar can be adjusted appropriately by adjusting the force transmitted to a connecting unit during operation of a hand guard. Thus, the saw chain 6 can be easily strained at great tension without use of a strong coil spring.

Abstract: A manually guided implement having an engine housing and a handle housing that are interconnected by anti-vibration elements. The handle housing is provided with a longitudinal support having, relative to a conventional operating position of the implement, a front end face that is disposed transverse to a longitudinal axis of the longitudinal support. A securement end of a front tubular handle rests against and is secured to the front end face of the longitudinal support.

Abstract: A saw box for preventing chain shot from a broken sawchain of a chainsaw, the saw box including a stationary shield that covers a rear section of the saw. The shield has an end surface that extends between an outer surface and an inner surface of the shield and has such hardness and is designed with a convex curvature of such a radius that one part of the broken sawchain that comes to an external location during operation of the saw can slide around the end surface in an essentially unhindered manner in a direction towards the inner surface.

Abstract: A chain saw includes: a motor driven by electric power; a housing configured to accommodate the motor; a guide bar attached to the housing; a chain blade wound around the guide bar; a sprocket engaged with the chain blade to drive the chain blade, wherein the chain saw is configured to transmit a driving force of the motor to the sprocket via a clutch mechanism, wherein the chain saw comprises a shut-off switch for detecting an actuation of the clutch mechanism and is configured such that the power supply to the motor is stopped when the actuation of the clutch mechanism is detected by the shut-off switch so as to brake electrically. The electrical brake is provided together with a mechanical brake that is configured to work when a hand guard is rotated.

Abstract: A handheld work apparatus such as a stone cutter (1) having a housing (2) in which a drive motor (5) is arranged. The work apparatus has a tool driven by the drive motor (5) for cutting mineral or metallic materials. The housing (2) has a housing front end (16) facing the workpiece to be cut and arranged adjacent to the workpiece. The tool projects beyond the housing front end (16). In order to avoid damage on the housing front end (16), it is provided that an elastic guard (17, 47), which extends over at least 50% of the width (b) of the housing front end (16), is arranged on the housing front end (16).

Abstract: A double chain saw arrangement which has diametrically oppositely extending chain saws powered by a single motor driving two sprockets on said hub, each engaged with an associated chain saw chains on each chain saw bar mounted to the hub. A series of hooked capture pieces project from one side of the chain saw bars in a plane parallel to the chain saw bars, which pieces act to cause brush and limbs to be captured and forced into contact with the saw chains to be cut thereby.

Abstract: According to a chain saw braking system, engagement between a front end portion of a belt and a main body by an engagement member is released at the time of application of an impact. When a front end portion is pulled by the spring force of a compression coil spring, an elongate hole for protrusion is engaged with a protrusion to restrict a rear end portion from being moved in the same direction as the front end portion. Thus, it is possible to strongly tighten a drum by the belt to thereby reliably stop the movement of a chain. With this arrangement, the chain can be prevented from being damaged when a chain saw is accidentally dropped onto the ground due to an impact applied thereto.

Abstract: The present invention discloses a vegetation pruning device comprising a main body; a cutting element; a guide bar for supporting the cutting element; a motor for driving the cutting element; a first handle assembly; a second handle assembly; a locking mechanism for detachably securing the second handle assembly to the first handle assembly; a connecting mechanism being positioned between the first handle assembly and the guide bar; the first handle assembly or the second handle assembly being operable to move linearly toward to or away from the guide bar, the connecting mechanism is provided to change the linearly movement of the first or the second handle assembly to the pivoting of the guide bar. Both of the first handle assembly and the second handle assembly are moving linearly, which makes the operator feel comfortable in any working instance.

Abstract: A chainsaw, comprising: a guide bar, a cutting chain and a driving unit arranged to drive the cutting chain around the guide bar. The guide bar defines a first longitudinal axis extending along a centre of the guide bar. The chainsaw further comprising a handle section for carrying and operating the chainsaw, wherein the handle section includes a control portion disposed on the upper side of the chainsaw. The control portion in turn includes a throttle lever for controlling the speed of the driving unit and the control portion has a left and a right side. The control portion defines a second longitudinal axis substantially extending along an upper side of at least a part of the control portion. An angle, A, between the first and the second longitudinal axes is between 14° and 45.

Abstract: A hedgetrimmer having a housing, a motor located within the housing for driving a reciprocating blade for cutting vegetation. A front handle located at a front end of the housing and a rear handle located at a rear end of the housing. The rear handle having a trigger to actuate the motor, the rear handle being rotatable around a longitudinal axis of the housing. The rear handle is lockable at one of several positions so that a user can grip the two handles in the most comfortable position for the desired cutting operation.

Abstract: The invention provides a chain saw attachment for unobstructed cutting of smaller objects with diameters less than three inches and larger objects with diameters greater than three inches. The attachment includes a set of prongs that vertically extend at an acute angle from a cover above the cutting teeth of the chain saw blade to a specified distance below the blade. The prongs stabilize small objects from whipping and dragging when engaged by the cutting teeth and facilitate the cutting of brush with diameter equal to height of the blade. Moreover, the cover does not extend the full length of the blade to allow for fully unobstructed cuts using the uncovered section of the blade. The cover increase safe operation of the chain saw and distributes stress from a particular prong over the entire attachment.

Abstract: A work implement in the nature of a drive for a tool includes a starting and/or switching-off braking device for the tool. A brake button is provided which can be externally actuated by a user, with which a starting and/or switching-off brake can be released. A device is also provided which can change the rotational speed of the drive, the device having a throttle button capable of being actuated by the user from outside. The brake button and the throttle button are arranged on a handle so that they can be contacted simultaneously by the hand of a user, where the throttle button can be actuated when the starting and/or switching-off brake is applied.

Abstract: A vegetation pruning device (2) includes a pair (4,6) of pivotally coupled arms. A motor bracket (36) with a rotary output drive (34) provides drive to a cutting element (8) which is coupled to the rotary output drive (34). The cutting element (8) is arranged for cutting vegetation (44) presented thereto.

Abstract: A vegetation pruning device (102) includes a pair (114, 116) of pivotably coupled handles and a motor having a rotary output drive (130) for driving an endless flexible cutting chain (108). A guard (162) is moved relative to the chain (108) by pivoting the handles (114, 116) relative to each other to grip vegetation between the guard (162) and the chain (108). The guard is provided with a pair of curved upper surfaces (164) having teeth (166). The rotary output drive (130) of the motor is arranged generally coaxially with the axis of pivotal movement of the handles (114, 116).

Abstract: A throttle control device for a hand held tool, such as a chain saw, is provided. The tool is provided with a forwardly extending wire for transmitting a motion from a throttle control lever turnably arranged about a first axis to a throttle valve. One end of the wire is secured to a wire arm that is turnably arranged about a second axis. The wire arm is provided with one or several teeth cooperating with the throttle control lever and the second axis is arranged behind the first axis.

Abstract: The invention relates to a chainsaw having a front hand guard (20) including a protective structure (21), projecting in front of the front handle (5), pivotally attached to the engine housing (2) by at least one lever (25, 26) for activating a brake to brake the movement of the saw chain when being pivoted. The protective structure (21) includes see through means (24) enabling at least partial visibility through the protective structure (21), and twig preventing means for limiting the risk of objects such as twigs to get stuck in the protective structure (21).

Abstract: A chain saw arrangement for cutting flat sides or kerfs on a round log or timber. The arrangement includes a chain saw housing at a first end of the chain saw. An elongated chain/blade supporting frame extends from the chain saw housing. A multi-tooth chain/blade is movably supported from the elongated frame. A support bracket is secured to one side of the elongated frame for providing restricted support of the chain/blade on a log or timber during cutting of a transverse kerf thereon.

Abstract: A chainsaw that increases the level of operator safety by reducing or eliminating cut through and kickback injuries without impeding cutting operations, and increases operator comfort through ergonomics, therefore extending stamina. This is accomplished by a dual stage multi-hinged bar device that physically inhibits kickback and cut through injuries. The device, which returns to it's original position after cutting, will open up a total of 88 degrees to allow for cutting of items that are larger than the length of the guide bar. Relocation of the handles leads users toward physically holding the saw in such a manner that creates an ergonomically advantageous body position, reducing fatigue and strains. The body of the saw and the bar device will rotate 45 and 90 degrees both right and left while the handles and operators grip remain in the same position. The chainsaw also incorporates an easy to use chain adjustment.

Abstract: A chainsaw that increases the level of operator safety by reducing or eliminating cut through and kickback injuries without impeding cutting operations, and increases operator comfort through ergonomics, therefore extending stamina. This is accomplished by a dual stage multi-hinged bar device that physically inhibits kickback and cut through injuries. The device, which returns to it's original position after cutting, will open up a total of 88 degrees to allow for cutting of items that are larger than the length of the guide bar. Relocation of the handles leads users toward physically holding the saw in such a manner that creates an ergonomically advantageous body position, reducing fatigue and strains. The body of the saw and the bar device will rotate 45 and 90 degrees both right and left while the operators grip on the saw remain in the same position. The chainsaw also incorporates an easy to use chain adjustment.

Abstract: The invention provides a chain saw attachment for unobstructed cutting of smaller objects with diameters less than three inches and larger objects with diameters greater than three inches. The attachment includes a set of prongs that vertically extend at an acute angle from a cover above the cutting teeth of the chain saw blade to a specified distance below the blade. The prongs stabilize small objects from whipping and dragging when engaged by the cutting teeth and facilitate the cutting of brush with diameter equal to height of the blade. Moreover, the cover does not extend the full length of the blade to allow for fully unobstructed cuts using the uncovered section of the blade. The cover increase safe operation of the chain saw and distributes stress from a particular prong over the entire attachment.

Abstract: A chainsaw and an attachment are disclosed. A lock strip is aligned with and near the bottom edge of the chain bar. A plurality of substantially C-shaped stop members engage non-circular indentations formed in the lock strip with one leg and the opposite side of the bar chain with the other leg. The substantially C-shaped stop members are large enough to go around the chain without touching the chain and to block brush and small limbs so as to be cut and from being dragged by the chain into the housing. A tightening screw is associated with each of the plurality of substantially C-shaped stop members for holding the C-shaped stop member in a tight relationship with both the lock strip and the chain bar. In one arrangement, each of the plurality of non-circular indentations is substantially square and the shape of the mating part of the leg of the substantially C-shaped stop member is also square to create a snug fit.

Abstract: A chain guard for a motor-driven chain saw has a narrow casing with a front end and a back end. The casing has two parallel side walls and an upper wall and a lower wall connecting the side walls to each other. The casing is closed at the front end thereof and defines an opening at the back end. A device is provided on the casing for attaching the chain guard to the clothing of the operator, a rope, a carabiner or the like.