Abstract: An operation member has a higher degree of design freedom in, for example, the position and the amount of displacement of an operation part, and the force used for operation. A portable cutting machine includes a base, an electric motor, a blade rotatable by the electric motor, a movable cover covering a lower part of the blade protruding downward from the base and rotatable to be open, an operation lever located frontward from a rotation center of the blade and rotatable, and a transmission lever rotatable to push and open the movable cover when pushed by the operation lever.

Abstract: The present disclosure relates to engine-driven tool (1) comprising a rotatable work tool (2) and an engine (4) for propelling a first driving pulley (28) via a clutch wheel (30) comprised in a power transferring unit (27) and having an outer edge. The first driving pulley (28) and the clutch wheel (30) arc arranged to rotate around a common driving axis (38). The power transferring unit (27) comprises an endless drive belt (9) that is arranged propel the rotatable work tool (2) when the first driving pulley (28) is propelled. A fan arrangement (13) is arranged to convey air front a dust channel (11) formed between a shielding cover (8) and the rotatable work tool (2), and comprises a fan turbine (26) that is connected to a fan pulley (29) connected to the drive belt (9) is arranged to propel the fan pulley (29).

Abstract: A working machine includes: an output shaft to which a tip tool is attachable; a housing rotatably supporting the output shaft; and a protection cover attached to the housing so as to cover an outer periphery of the tip tool which is attached to the output shaft. The protection cover is configured to be displaceable between a processing position to expose a part of the outer periphery of the tip tool to thereby allow cutting of a workpiece, and a protecting position to cover the outer periphery of the tip tool more than in the processing position, and is biased by a biasing member to be displaced from the processing position to the protecting position.

Abstract: The disclosure relates to a circular saw, in particular a hand-held circular saw, having a housing and a drive unit, at least some sections of which are arranged in the housing and with which a tool holder for an exchangeable saw blade is associated. The drive unit is designed to rotationally drive the exchangeable saw blade about an associated axis of rotation. In the circular saw, a blade guard is associated with the exchangeable saw blade. The blade guard is mounted in the housing for rotation about the associated axis of rotation and extends around a cutting point of the exchangeable saw blade at least during a sawing operation in such a way that contact with the cutting point can be at least substantially prevented.

Abstract: A table saw includes a table, a saw unit movably coupled underneath the table, a riving knife extending through the table, and a quick-release assembly selectively coupling the riving knife to the table. The quick-release assembly includes a mounting plate coupled to the table and a clamping plate movable relative to the mounting plate between a clamping position, in which the riving knife is clamped between the mounting plate and the clamping plate to secure the riving knife to the table, and a release position, in which the riving knife is releasable from the table. The quick-release assembly further includes a pin coupled for movement with the clamping plate and a handle pivotably coupled to the pin. The pin has a cam portion engageable with the saw unit. The clamping plate is movable between the clamping position and the release position in response to pivoting movement of the handle.

Abstract: A foot for use in supporting a hand-held oscillating power tool on a workpiece includes a plate defining a recess for supporting the body of the power tool at a desired angle relative to the workpiece. The foot includes a plurality of roller elements mounted to the plate and adapted for rolling engagement with the workpiece as the foot is navigated along the surface of the workpiece while performing a cut. An adjustable support may be provided to adjust the angle of the power tool relative to the workpiece.

Abstract: A power tool that drives rotary cutting element has a retractable guard for the cutting element, and a guard control apparatus allows a user to maintain the guard in a retracted position during operation of the power tool. The guard control apparatus includes an auxiliary handle fastened to the housing of the power tool, and latching elements linked to a spring-biased lever mounted in the auxiliary handle for selectively and temporarily retaining the retractable portion of the guard in a retracted position to enable plunge and other complex cutting operations. An alignment ring is selectively engaged by a user-manipulated alignment pin to rotationally lock the guard in one of a preset number of rotary orientations.

Abstract: A portable tile cutter includes a main unit having a base frame and a guard connected to the base frame, a cutter blade pivotally mounted at the guard, a driving unit connected to the guard and operable to rotate the cutter blade, a first handle connected to the driving unit, and a second handle connected to the guard and providing a grip. The component parts of the portable tile cutter are so arranged that moving one or both the driving unit and the second handle can achieve adjustment of the gap between the first handle and the grip of the second handle. Thus, the portable tile cutter can fit different users having different body sizes.

Abstract: A hand saw machine with environment control device includes a motor assembly, a cutting tool for cutting a work piece and driven to rotate by the motor assembly, and an environment control device connected to the motor assembly, wherein the environment control device includes an air intake hood sheltering the motor assembly from residual particles ejected by the work piece during cutting, wherein the hand saw machine further has an air passage formed by the environment control device and the motor assembly.

Abstract: Embodiments of a power saw are disclosed which comprise a base structure including a generally flat top having an upper work surface with the top having an opening through which a circular blade can extend, a relatively narrow box-like undercarriage pivotably mounted to the base around a pivot axis to provide an adjustable bevel angle of the blade relative to the top, and a motor saw assembly comprising an arbor shaft for mounting a circular blade thereon, a drive motor having an output shaft extending generally parallel to the plane of the blade, the output shaft being oriented 90 degrees relative to the arbor shaft, a speed reducing gear train interconnecting the output shaft and the arbor shaft, a gear housing enclosing the gear train, the motor saw assembly being adjustably mounted to the undercarriage to vary the portion of the blade that extends above the upper work surface.

Abstract: A chop saw includes a base assembly and a saw assembly pivotally attached to the base assembly. The base assembly has a workpiece-supporting plane. The saw assembly has a blade and a motor driving the blade. A hinged connection between the base assembly and a saw assembly allows a user to rotate the saw assembly from a position where the plane of the blade extends through the workpiece-supporting plane to a position where the plane of the blade does not extend through the workpiece-supporting plane. In such position, the plane of blade may be substantially parallel to the workpiece-supporting plane. A switch or sensor may detect when the saw assembly is in the pivoted position so that the motor cannot be activated in such position.

Abstract: An apparatus is configured for use with a ground-engaging wheel of a device configured to move in a travel direction. The apparatus includes a guard and bracket assembly, wherein the guard is configured to be movable over the wheel. The guard has forward portion, a back portion, and a width substantially covering a width of the wheel. The guard is configured to be movable over the wheel from a first position to a second position. In the first position, the forward portion of the guard is disposed proximate an upper portion of the wheel and the back portion of the guard is disposed proximate a rear portion of the wheel relative to the travel direction. In the second position, the forward portion of the guard is disposed proximate a front portion of the wheel and the back portion of the guard is disposed proximate an upper portion of the wheel.

Abstract: A wind shielding portion is provided in a front side of an exhaust port for cooling air from a motor such that it crosses over a lateral width with respect to a cutting direction. The cooling air which is blown to the wind shielding portion is effectively blown through a ventilation portion having a small ventilating resistance force and towards a marking line guide. Even when the cutting device main body is set at an incline, the cooling air is blown to the wind shielding portion, and is effectively blown through the ventilation portion to the marking line guide.

Abstract: A table saw in one embodiment includes a work-piece support surface, a shaping device support shaft automatically retractable along a retraction path to a location beneath the work-piece support surface in response to a sensed condition, a belt positioned across the retraction path, and a control system configured to cause the shaping device support shaft to retract along the retraction path in response to a sensed condition.

Abstract: A tile saw includes a base, a frame assembly disposed on the base, a first rail disposed on the frame assembly, the first rail having a longitudinal axis. A table is slidingly disposed on the first rail and a support assembly is disposed on the base. A saw assembly is supported by the support assembly and includes a motor within a motor housing, and a cutting wheel driven by the motor. The motor housing has an inlet for allowing air into the motor housing, a serpentine path within the motor housing, between the inlet and the motor, for directing air through the motor housing, and a filter within the motor housing.

Abstract: An improved design for a dust shroud providing an airflow conduit for collecting dust off a work piece and a saw blade is disclosed. The dust shroud is configured with either one or two extending and telescoping lower rigid jaws that are durable and can engage a work piece at different angles. A novel roller is additionally provided for moving along a work piece.

Abstract: A saw assembly includes a drive member, a motor, a housing, and a foot. The drive member is configured to be moved in a repeating pattern. The motor is configured to move the drive member in the repeating pattern. The housing defines an interior space in which the motor is positioned. The foot includes (i) a base having an upper surface and a lower work piece contact surface, and (ii) a conduit structure secured to the upper surface of the base. The housing is pivotably mounted to the conduit structure.

Abstract: A circular saw includes a housing assembly and a drive motor assembly coupled to the housing assembly. An output member is driven by the drive motor assembly. A shoe is adjustably mounted to the housing assembly. A circular saw blade has a diameter of about 7.3 inches. The shoe can be adjusted to provide a depth of cut that is greater than or equal to about 3.0 inches.

Abstract: A power tool is provided with a perforated material remover to remove perforated material from power tool cutting implements. The power tool also includes a rip guide which has a long guide edge and two attachment points to the shoe/base of the saw. The rip guide is attached to the base/shoe via a pair of L-shaped openings that accept L-shaped support arms of the rip guide. The rip guide can also be folded for compact storage. The power tool also includes dual bevel scales for quickly and easily setting the bevel angle on the power tool.

Abstract: A power tool includes a handle including a support portion movably supportable on a housing portion and extending substantially about the circumference of the housing portion. The support portion may include a second end movable relative to a first end such that the support portion selectively applies a force to the housing portion. The tool may include a bevel angle detent mechanism in which one of the detent member and the recess is angularly adjustable relative to the associated one of the detent support and the recess support to adjust the predetermined bevel angle position. A bevel angle detent mechanism may include an engagement operating assembly operable between a detent engagement-enabled condition, in which the detent member is engageable in the recess, and a detent engagement-prevention condition, in which the detent member is prevented from engaging the recess. The tool may include a spindle lock assembly.

Abstract: A power tool in one embodiment includes a motor supported by a frame, a foot defining a first plane, a first guide fixedly positioned with respect to the foot and defining a first arc in a second plane, a second guide fixedly positioned with respect to the foot and defining a second arc in a third plane, wherein the second plane and the third plane are orthogonal to the first plane and the first arc and the second arc are offset when projected onto a reference plane parallel to the second plane and the third plane, a first pin fixedly positioned with respect to the motor and guided by the first guide; and a second pin fixedly positioned with respect to the motor and guided by the second guide.

Abstract: A power tool for cutting a workpiece including a casing, an auxiliary handle assembly extending from the casing, a motor disposed at least partially in the casing, and a drive transmission operably coupled to the motor. The drive transmission outputs a driving force in response to an input from the motor. A spindle locking mechanism is provided that is selectively positionable between a retracted position spaced apart from the drive transmission and a locked position engaging the drive transmission. The spindle lock mechanism thereby prevents rotation of the drive transmission in response to actuation of a pad member. The pad member can be positioned adjacent to the auxiliary handle to permit single-handed holding of the power tool and actuation of the pad member.

Abstract: A safety guard assembly for use on a handheld power saw is disclosed. The assembly includes a safety guard, a locking mechanism, and a weight. The safety guard is swingably mounted on the hood of the saw. The locking mechanism allows the guard to be swung to an open position and locked in position. In a kick-back situation, the locking mechanism quickly releases. The weight forces the guard to swing rapidly down over the guard, thereby providing protection from the saw blade.

Abstract: A power tool is provided with a perforated material remover to remove perforated material from power tool cutting implements. The power tool also includes a rip guide which has a long guide edge and two attachment points to the shoe/base of the saw. The rip guide is attached to the base/shoe via a pair of L-shaped openings that accept L-shaped support arms of the rip guide. The rip guide can also be folded for compact storage. The power tool also includes dual bevel scales for quickly and easily setting the bevel angle on the power tool.

Abstract: A portable cutting apparatus. The apparatus includes a motor and a cutting blade driven by the motor. A protective housing encloses at least a portion of the cutting blade. A vacuum impeller is disposed in a vacuum housing to generate airflow to move dust and debris created by the cutting blade into a removable vacuum bag. At least one vacuum tube directs the airflow from the protective housing to the vacuum housing. The motor operates both the cutting blade and the vacuum impeller. A bellows interconnects the protective housing and a lower platform. The lower platform pivots relative to the cutting blade about a pivot axis that is outwardly spaced from and parallel to a cutting plane defined by the cutting blade.

Abstract: A power tool is disclosed, which includes a tip tool driven by an electric motor, a main body for supporting the tip tool and a dust nozzle which is provided to the main body and to which a dust bag or a dust hose is connectable. When the dust nozzle is aligned in a first direction, the dust nozzle is rotatable with respect to the main body around the first direction as a rotation center. When the dust nozzle is inclined with respect to the first direction from a first position to a second position, the dust nozzle is not rotatable around the first direction.

Abstract: A power tool, a saw and a circular saw. The power tool may include a handle including a support portion movably supportable on the housing portion and extending substantially about the circumference of the housing portion. The support portion may include a second end movable relative to a first end such that the support portion selectively applies a force to the housing portion. The saw may include a bevel angle detent mechanism in which one of the detent member and the recess is angularly adjustable relative to the associated one of the detent support and the recess support to adjust the predetermined bevel angle position. A bevel angle detent mechanism may include an engagement operating assembly operable between a detent engagement-enabled condition, in which the detent member is engageable in the recess, and a detent engagement-prevention condition, in which the detent member is prevented from engaging the recess. The circular saw may include a spindle lock assembly.

Abstract: In an electric saw includes a circular saw blade, a guard cover is arranged to surround an upper portion of the circular saw blade and a dust collecting case is arranged at the rear of the guard cover for collecting chips generated during a cutting operation performed by the circular saw blade. An openable lid unit is arranged in a position along a passage through which the chips pass. The guard cover is formed into a curved shape along the circular saw blade and the passage is defined by the guard cover to extend along a peripheral edge of the circular saw blade. The lid unit includes an opening portion formed in the passage and a lid member for closing the opening portion. The lid unit is opened toward the front of the guard cover as the lid member is rotated along a rotating plane of the circular saw blade.

Abstract: A powered vinyl groover includes a motor attached to a circular blade and a blade housing for covering the circular blade. The blade housing includes a duct to carry cuttings into a collection bag. Near an inlet hole of the duct is a fin, which may be a raised surface on any interior wall of the blade housing extending into the blade housing as close as possible to the blade. The fin causes airflow from the blade to be redirected towards the inlet hole of the duct so that more cuttings enter the duct and are carried by the duct through to an outlet hole to a collection bag mountable over the outlet hole of the duct. The fin may be integral with the blade housing or attached to it, and a fin may also be added to existing groovers.

Abstract: A technique is provided which is effective in preventing chips generated during cutting operation on a workpiece from being accumulated in a region ahead in a cutting direction. A representative cutting machine includes a motor, a blade, a body housing having a first region that houses the motor and a second region that covers the blade and projects forward of a front surface of the first region, a base, an angular plate, an outlet formed in the body housing, an opening and a blocking part. The blocking part prevents the air discharged from the outlet from flowing out laterally with respect to the moving direction of the base through a clearance between a front end of the second region and the one end of the angular plate and thereby helps the air discharged from the outlet flow into the opening.

Abstract: A power tool for cutting a workpiece including a casing, an auxiliary handle assembly extending from the casing, a motor disposed at least partially in the casing, and a drive transmission operably coupled to the motor. The drive transmission outputs a driving force to a circular cutting blade in response to an input from the motor. The power tool further includes a movable blade guard pivotally coupled about an axis relative to the casing. The movable blade guard includes an inboard surface, an outboard surface, and an edge surface defining a cavity for receiving the circular cutting blade. The outboard surface defines a cam having a camming tip and a camming portion. The camming portion extends substantially along a radial line from the axis.

Abstract: A circular saw including a motor housing having a first end portion and a second end portion, a motor assembly disposed within the housing, a rotary blade assembly having a predetermined weight mounted to the first end portion of the motor housing, and a battery pack having a predetermined weight disposed on the second end portion of the motor housing. The battery pack and the rotary blade assembly are configured and arranged to be in longitudinal alignment with one another, and the longitudinal alignment of the battery pack with the rotary blade assembly promotes counterbalancing between the predetermined weight of the rotary blade assembly and the predetermined weight of the motor housing.

Abstract: A safety guard assembly for use on a handheld power saw is disclosed. The assembly includes a safety guard, a locking mechanism, and a weight. The safety guard is swingably mounted on the hood of the saw. The locking mechanism allows the guard to be swung to an open position and locked in position. In a kick-back situation, the locking mechanism quickly releases. The weight forces the guard to swing rapidly down over the guard, thereby providing protection from the saw blade.

Abstract: A quick-release structure for outer cover of a handheld circular saw, including a main body, an outer cover, a circular saw blade disposed between the main body and the outer cover, a motor disposed in the main body for driving the circular saw blade and a first, a second, a third and a fourth connection sections. The first and second connection sections are respectively disposed at a first end and a second end of the main body. The third connection section is disposed at a first end of the outer cover corresponding to the first connection section for connecting therewith. The fourth connection section is disposed at a second end of the outer cover corresponding to the second connection section for connecting therewith. The third connection section is angularly and linearly displaceable relative to the outer cover and the first connection section without detaching from the outer cover.

Abstract: A portable cutting tool includes a saw blade for cutting a workpiece, a cutting tool main body having a motor for driving to rotate the saw blade, and a base for guiding the cutting tool main body along a surface of the workpiece. A cut depth of the saw blade projected from a lower face of the base is made to be able to be adjusted by pivoting the cutting tool main body centering on a support shaft connected to the base. The portable cutting tool is provided with a mechanism for fixing the cut depth at a preset position when the cut depth of the saw blade is gradually increased from a minimum cut depth.

Abstract: A portable electric cutting apparatus includes a housing for housing an electric motor rotating a saw blade, a saw cover attached to the housing, the saw cover having a shape to cover an upper half of an outer periphery, the saw cover including a saw blade housing portion at least partially housing the saw blade and a cylindrical portion having a substantially cylindrical shape, the cylindrical portion connecting to the housing at an end face of the cylindrical portion a base being joined to at least one of the saw cover and the housing, the base having an opening to allow the saw blade to project downwardly from a bottom face which is slidable on a cut material and a fan being driven by the electric motor, wherein a discharge passage forming member is provided with the saw cover so as to form a discharge passage by cooperating with a wall face of the saw cover.

Abstract: Provided is an apparatus for lifting a retractable lower safety-guard on a circular saw. In one representative implementation, an actuator is attached to the circular saw and an elongated arm is coupled to the actuator such that operating the actuator causes the elongated arm to lift. In addition, an engagement element is attached to the retractable lower safety-guard of the circular saw. When lifted, the elongated arm engages the engagement element, thereby retracting the retractable lower safety-guard of the circular saw. Preferably, the actuator is configured, and is located sufficiently close to a power switch for the circular saw, so that the actuator can be operated simultaneously with the power switch using a single hand. Also provided are retrofitting techniques for attaching such a device to an existing circular saw.

Abstract: Disclosed is a method and apparatus finishing the surface of a wood piece to appear rough hewn. The apparatus comprises a hand planer having a longitudinal direction, a rotatable cutter head having at least one planning blade and a bottom surface. The bottom surface has a convex curved profile longitudinally along the hand planer. The cutter head extends below the curved profile of the bottom surface. The method comprises simultaneously translating and rocking the hand planer on the bottom surface so as to intermittently engage the cutter head against a surface so as to form a plurality of spaced apart divots therein.

Abstract: A powered vinyl groover includes a motor attached to a circular blade and a blade housing for covering the circular blade. The blade housing includes a duct to carry cuttings into a collection bag. Near an inlet hole of the duct is a fin, which may be a raised surface on any interior wall of the blade housing extending into the blade housing as close as possible to the blade. The fin causes airflow from the blade to be redirected towards the inlet hole of the duct so that more cuttings enter the duct and are carried by the duct through to an outlet hole to a collection bag mountable over the outlet hole of the duct. The fin may be integral with the blade housing or attached to it, and a fin may also be added to existing groovers.

Abstract: A portable cutter has a base member, a main body, a cutting blade, a protection member, a dust collection member, and a guide member. The base member moves on a workpiece, the base member having a shaft provided in proximity to one end thereof. The main body is coupled to the base member. A posture of the main body with respect to the base member is changeable. The cutting blade is attached to the main body and driven to cut the workpiece. The cutting blade has an outer periphery. The protection member covers a part of the outer periphery of the cutting blade. The dust collection member has an inlet provided in proximity to the outer periphery of the cutting blade for drawing and collecting dust. The guide member is pivotably supported to the shaft of the base member for guiding the dust to the opening of the dust collection member.

Abstract: In an electric saw includes a circular saw blade, a guard cover is arranged to surround an upper portion of the circular saw blade and a dust collecting case is arranged at the rear of the guard cover for collecting chips generated during a cutting operation performed by the circular saw blade. An openable lid unit is arranged in a position along a passage through which the chips pass. The guard cover is formed into a curved shape along the circular saw blade and the passage is defined by the guard cover to extend along a peripheral edge of the circular saw blade. The lid unit includes an opening portion formed in the passage and a lid member for closing the opening portion. The lid unit is opened toward the front of the guard cover as the lid member is rotated along a rotating plane of the circular saw blade.

Abstract: A power saw including a body housing enclosing a motor, a saw blade operatively coupled to the motor, and a cutting head at least partially covering the saw blade, wherein the cutting head is rotatable relative to the body housing and is configured to be set relative to the body housing in at least two different fixed positions.

Abstract: It is an object of the invention to provide a dust collecting circular saw in which cooling air to cool the motor can be further effectively utilized. According to the present invention, a representative dust collecting circular saw may comprise a blade, a motor, a cooling fan, a dust case, a dust case cover and an air space between the dust case cover and the dust case. The cooling air to cool the motor is designed to be introduced into the air space. Therefore, according to the invention, heat of the dust case caused by hot chips collected within the dust case can be prevented from being transferred from the dust case to the dust case cover by the air space into which the cooling air is introduced. Thus, the user of the circular saw can securely be escaped from contacting any circular saw members heated by the hot chips within the dust case.

Abstract: Embodiments of an accessory attachment for a rotary power hand tool are disclosed wherein the hand tool is of the type which has a tool housing with a preferably cylindrical nose portion, a motor having a motor drive shaft with a mounting coupling extending forwardly from the nose portion for receiving a drive shaft, the attachment including a housing having a first end portion configured to be mounted to the tool housing nose portion and an input shaft for coupling to the motor drive shaft, and having an enlarged second end portion oriented at a right angle relative to the first end portion and also having an output shaft coupled to the input shaft at a preferably right angle relative thereto, a rotary cutting wheel mounted to the output shaft and substantially disposed within the enlarged second end portion, excepting an exposed portion of the rotary cutting wheel for engaging a work surface, and a removable cover configured to engage said enlarged second end portion to at least partially enclose said rotar

Abstract: A power tool for cutting a workpiece including a casing, an auxiliary handle assembly extending from the casing, a motor disposed at least partially in the casing, and a drive transmission operably coupled to the motor. The drive transmission outputs a driving force in response to an input from the motor. A spindle locking mechanism is provided that is selectively positionable between a retracted position spaced apart from the drive transmission and a locked position engaging the drive transmission. The spindle lock mechanism thereby prevents rotation of the drive transmission in response to actuation of a pad member. The pad member can be positioned adjacent to the auxiliary handle to permit single-handed holding of the power tool and actuation of the pad member.

Abstract: It is, accordingly, an object of the present invention to provide a technique which is effective in preventing chips generated during cutting operation on a workpiece from being accumulated in a region ahead in a cutting direction. A representative cutting machine includes a motor, a blade, a body housing having a first region that houses the motor and a second region that covers the blade and projects forward of a front surface of the first region, a base, an angular plate, an outlet formed in the body housing, an opening and a blocking part. The blocking part prevents the air discharged from the outlet from flowing out laterally with respect to the moving direction of the base through a clearance between a front end of the second region and the one end of the angular plate and thereby helps the air discharged from the outlet flow into the opening.

Abstract: A power tool for cutting a workpiece including a casing, an auxiliary handle assembly extending from the casing, a motor disposed at least partially in the casing, and a drive transmission operably coupled to the motor. The drive transmission outputs a driving force to a circular cutting blade in response to an input from the motor. The power tool further includes a movable blade guard pivotally coupled about an axis relative to the casing. The movable blade guard includes an inboard surface, an outboard surface, and an edge surface defining a cavity for receiving the circular cutting blade. The outboard surface defines a cam having a camming tip and a camming portion. The camming portion extends substantially along a radial line from the axis.

Abstract: A circular saw including a motor housing having a first end portion and a second end portion, a motor assembly disposed within the housing, a rotary blade assembly having a predetermined weight mounted to the first end portion of the motor housing, and a battery pack having a predetermined weight disposed on the second end portion of the motor housing. The battery pack and the rotary blade assembly are configured and arranged to be in longitudinal alignment with one another, and the longitudinal alignment of the battery pack with the rotary blade assembly promotes counterbalancing between the predetermined weight of the rotary blade assembly and the predetermined weight of the motor housing.

Abstract: A self-contained vacuum circular saw is presented. The vacuum saw has a casing around the saw blade that includes an accordion type lower section attached to the lower platform of the saw. A number of vacuum tubes, preferably four, are attached to the side of the circular saw opposite the blade. The armature of the circular saw that turns the blade also turns the vacuum impeller on the side opposite the blade. An impeller vacuum chamber pulls in the dust and debris created by the saw blade and discharges the dust and debris into a disposable and removable vacuum bag. An important aspect of this device is that the motor that turns the saw blade also turns the impeller, thus making the self-contained vacuum saw moveable from site to site.

Abstract: An improved cutting device including a mechanism for selectively guarding the edge of a cutting blade. According to various embodiments, a sliding mechanism is operatively connected to a blade guard, wherein the translational movement of the sliding mechanism causes a corresponding rotational movement of the blade guard. When the blade guard is in an extended position, the edge of the cutting blade is not exposed, thereby preventing a user from accidentally cut by the blade. Various embodiments also provide for an improved blade replacement system. According to various embodiments, a locking member is capable of lifting the cutting blade without the user having to touch the blade itself.