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 chain bar unit for a wall saw is presented herein. The chain bar unit can include a bar configured to receive a circulating chain or wire around a perimeter of the bar. The chain bar unit also can include a driving gear for driving the chain or wire around the bar, the driving gear configured to be coupled to an output shaft of the wall saw. The chain bar unit further includes the bar being tapered from an end proximate to the driving gear to a distal end having a distal end radius, wherein a width of the bar at the proximate end, is at least two times the distal end radius of the distal end.

Abstract: A protective hood rotation prevention device for a power tool, in particular an angle grinder, includes a clamping unit that is configured to clamp a protective hood unit. The clamping unit includes at least one clamping element with a rotation prevention unit that has a rotation prevention element. The device further includes a movement coupling unit that is configured to move the rotation prevention element in at least one operating state depending on a movement of the clamping element. The device also includes a securing unit that is configured, in at least one operating state, to secure the rotation prevention element, in the event of a movement of the clamping element in a loosening direction of the clamping element, at least as far as possible counter to a movement in an uncoupling direction of the rotation prevention element out of a rotation prevention position of the rotation prevention element.

Abstract: A portable working machine is provided with a wheel guard partially covering a wheel rotated by a drive source such as an engine, and the wheel guard is retained by a retaining portion of an arm via rubber dampers serving as elastic members. Concave-convex portions are formed on the rubber dampers, a convex-concave portion corresponding to the concave-convex portions is formed in the wheel guard side, and the wheel guard is retained by the arm so that the concave-convex portions are engaged with the convex-concave portion.

Abstract: A handheld engine-driven cutter is provided with a disk blade and a main body that drives the disk blade by an engine. A guard surface for repelling chips of a workpiece that scatter from the disk blade to below the main body is formed on the main body. The guard surface has an asymmetric shape with respect to a boundary that is a rotating plane of the disk blade.

Abstract: A power tool includes a housing accommodating a motor therein, a bearing base having a lower surface and an upper end that is connected to the housing, an output shaft that is mounted in the bearing base and protrudes out of the lower surface of the bearing base, a shield that is movably connected with the bearing base, and a locking mechanism for locking the shield relative to the bearing base. The locking mechanism further includes a locking element arranged on the shield and a stop member and the bearing base is formed with a hollow chamber within which the stop member is arranged.

Abstract: The invention relates to a protective hood for a hand tool, in particular for an electrical hand tool which has a support area for the attachment of a flange of the hand tool, and with a clamping device for fastening the protective hood to the flange as well as an anti-twist device to secure the angle position of the protective hood relative to the hand tool. It is provided that the support area (9) has at least one anti-twist device element (18) working in conjunction with at least one anti-twist device mating element (47) of the flange (34).

Abstract: According to an aspect of the present invention, there is provided a power tool including: a wheel guard detachably attached to an attachment portion of the power tool; a fastening portion connected to the wheel guard; and a manipulation lever connected to the fastening portion at one end thereof so that the fastening portion is fastened to or released from the attachment portion by operating the manipulation lever, wherein the manipulation lever is moved to a first position in which the fastening portion is fixed to the attachment portion and to a second position in which the fastening portion is pivotable with respect to the attachment portion, and wherein, when the manipulation lever is positioned at the first position, the other end of the manipulation lever is positioned at an outer circumference of the wheel guard.

Abstract: A system for a hand-held power tool has a tool housing, a receiving unit fixed to the tool housing and a guard unit connected with the hand-held power tool. The guard unit includes a guard extending at least partially around a rotatable tool. A guard anti-rotation lock device includes a clamping band fixedly connected to the guard that establishes a frictional connection between the guard unit and the receiving unit. The receiving unit includes a receiving flange and a connecting element that are together surrounded by and clamped in a clamping region by the clamping band to effect the frictional connection. In a case where the rotatable tool bursts into pieces during operation, the connecting element counteracts rotational movement of the guard unit with respect to the receiving unit by changing a cross-sectional shape of the clamping region.

Abstract: A dust shroud for an angle grinder includes an access hatch which slides along the shroud body to selectively expose an edge of a grinding disc to allow grinding into a corner. The hatch remains attached to the shroud body in both the open and closed position, making the hatch easier to use and less likely to become lost, resulting in increased worker compliance in properly using the hatch.

Abstract: The invention is based on a guard hood torsion preventer for a handheld power tool, in particular for a right-angle power sander. The invention is for preventing torsion of a guard hood on the handheld power tool, in particular in the event of damage to a tool. The guard hood torsion preventer includes at least one torsion-prevention unit which has a longitudinal axis, about which the torsion-prevention unit is rotatably supported.

Abstract: A protective guard is provided for a hand-held power tool, in particular a hand-guided grinding machine. According to the invention, the tool is at least partially covered by the protective guard. The guard is supported in an elastically flexible fashion in the circumference direction of the bearing journal by means of a spring means that prestress locking elements of a locking mechanism in their engaged positions.

Abstract: The invention relates to a hand-held power tool, particularly an angle grinder having a housing that has a flange neck, having a protective device that can be accommodated on the flange neck and that can be pivoted in the circumferential direction, and having at least one device for blocking at least one pivoting direction of the protective device. The invention proposes that the device for locking includes at least one stop and at least one counter-stop interacting with the stop.

Abstract: The invention relates to a protective hood anti-rotation lock for a portable power tool (12a-e), especially an angle grinder. Said protective hood anti-rotation lock is characterized in that it comprises an anti-rotation unit (14a-e) that is adapted to take into consideration at least one operating parameter of the portable power tool (12a-e) during anti-rotational locking.

Abstract: In a configuration in which a fixing screw is tightened and fixed between opposite ends of an attaching section of a whetstone cover, the fixing screw can be prevented from being removed from the end of the attaching section by fitting a rubber ring to a threaded shank of the fixing screw between opposite ends of the attaching section .

Abstract: The invention relates to a protective hood securing device for a portable power tool (12), especially an angle grinder. Said protective hood securing device comprises a protective hood unit (14), having a protective hood (16), and a securing unit (18) having at least one securing element (20) which is provided together with the protective hood unit (14) for protection in the event of a tool (22) breakage. For this purpose, the securing element (20) is at least partially configured by a protective cover (24) that is provided in addition to the protective hood (16).

Abstract: A hand-held power tool system has a hand-held power tool, a guard unit, and a guard anti-rotation lock unit configured to prevent rotation between the guard unit and the hand-held power tool in a case where a tool of the hand-held power tool breaks during intended operation. The guard anti-rotation lock unit also is configured to prevent rotation between the guard unit and the hand-held power tool at a same time as the guard unit is attached to the hand-held power unit, when the guard unit is in a working position. Preferably, the guard anti-rotation lock unit is at least partially located on a closing unit which includes a clamping band and a pivotable lever. The anti-rotation lock unit preferably includes an anti-rotation lock element provided on the lever.

Abstract: The invention is based on a handheld power tool, in particular a right-angle sander (10), having a gearbox (12), a flange neck (14) with a guard device (20), which device is receivable on the flange neck (14) and forms a receptacle region for a tool (18) and is rotatable in the circumferential direction (22), and having at least one detent device (24) for locking a rotary position of the guard device (20). It is proposed that the detent device (24) is at least partially integrated with the flange neck (14) of the gearbox (12).

Abstract: The invention is based on a protective hood fastening device having a fastening element (12a-12n) for fastening a protective hood (14a-14n) which is intended for partly enclosing a rotating application tool on a body (16a-16n) of an electric tool (10a-10n). It is proposed that the fastening element (12a-12n) comprise at least one latching element (18a-18n) for locking the protective hood (14a-14n) against rotation relative to the body (16a-16n) of the electric tool (10a-10n).

Abstract: A hand-held power tool system has a hand-held power tool, a guard unit, and a guard anti-rotation lock unit preventing rotation between the guard unit and the hand-held power tool during breakdown of a tool of the hand-held power tool and configured to prevent rotation between the guard unit and the hand-held power tool at a same time as the guard unit is being attached to the hand-held power unit when the guard unit is in a working position, the guard anti-rotation lock unit is at least partially located on a closing unit which includes a clamping band and a pivotable lever, and the anti-rotation lock unit includes at least one anti-rotation lock element provided on the lever.

Abstract: A machine tool having a protective hood is disclosed. The machine tool has a protective cover which has a clamping joint that can be attached in a flange on the machine with a clamping device. The machine tool also includes a stop device which is configured to limit the relative rotary motion between the protective cover and the flange.

Abstract: The invention relates to a portable power tool system comprising a portable power tool (12a-n), especially an angle grinder, a protective hood unit (14a-n) and a protective hood anti-rotation lock (16a-n) for providing anti-rotational locking between the protective hood unit (14a-n) and the portable power tool (12a-n) in the event of a breakage of a tool (18a-n). According to the invention, the protective hood anti-rotation lock (16a-n) is adapted to provide anti-rotational locking between the protective hood unit (14a-n) and the portable power tool (12a-n) while at the same time securing the protective hood unit (14a-n) to the portable power tool (12a-n) in a working position of the protective hood unit (14a-n).

Abstract: A guard for a power tool with a rotatably driven insertion tool (14) is configured to cover at least portions of the insertion tool (14). At least one blocking means (32, 40) prevents the insertion tool (14) from turning around an axis of rotation (18).

Abstract: A cover device for a power tool with at least one disc-shaped working tool (6), includes first and second cover parts (12, 22) and a locking mechanism (41) for releasably pivotally positioning the second cover part (22) relative to the first cover part (12) and having a locking element (46) provided on one of the first and second cover parts (12, 22) and engageable with a counter-locking element (23) provided on another of the first and second cover parts (12, 22), and an actuation member (42) pivotally supported at a pivot point (45) on the one of the first and second cover parts (12, 22) and having an actuation section (43) and a locking section (44) extending at an angle from the actuation section (43), with the locking element (46) being provided at a free end of the locking section (44).

Abstract: The invention relates to a protective hood anti-rotation lock for a portable power tool (12a-k), especially for an angle grinder, for providing anti-rotational locking between the portable power tool (12a-k) and a protective hood unit (14a-k). According to the invention, the protective hood anti-rotation lock has a form-fit unit (16a-k) which is provided for anti-rotational locking of the protective hood unit (14a-k) in relation to the portable power tool (12a-k) in the event of a tool (18a-k) breakage.

Abstract: The invention relates to a portable power tool (44) for a rotating, preferably disk-shaped tool. Said portable power tool comprises a machine housing (43), having a machine neck (22) to which a protective hood (1) can be detachably secured to at least partially cover the tool. Said protective hood (1) comprises a protective hood neck (2) and a clamp (29) is provided for the detachable securing. In order to provide an anti-rotation lock (48) which is effective between the machine neck (22) and the protective hood (1), a respective profiled structure (15) is arranged/configured on the clamp (29) and on the protective hood neck (7) or on the protective hood neck (7) and on the machine neck (22) or on the protective neck (7) and on the clamp (29) and on the machine neck (22).

Abstract: A hand-held power tool for a rotating tool has a machine housing with a machine neck, a guard for at least partially covering the tool and detachably attached to the machine neck and including a guard neck, a clamping cuff for detachably attaching the guard to the machine neck, and an engagement structure including an engagement element provided on the clamping cuff and at least one recess for engagement of the engagement element provided on the guard neck, or on the guard neck and the machine neck, to form a rotational lock that acts between the machine neck and guard, and the clamping cuff is a separate component attached to the machine housing.

Abstract: A deflection device for a rope saw assembly, includes a deflection roller (12; 52; 92); a stationary protective cover (13; 53, 93) surrounding art least some regions of the deflection roller (12; 52; 92); and at least one cover member (23; 63; 102, 103) pivotally arranged on the protective cover (13; 53, 93) surrounding at least some regions of the deflection roller, and displaceable along a path radially spaced from the axle (15; 55; 95) of the deflection roller (12; 52; 92).

Abstract: A protective guard is provided for a hand-held power tool, in particular a hand-guided grinding machine. According to the invention, the tool is at least partially covered by the protective guard. The guard is supported in an elastically flexible fashion in the circumference direction of the bearing journal by means of a spring means that prestress locking elements of a locking mechanism in their engaged positions.

Abstract: In a configuration in which a fixing screw 25 is tightened and fixed between opposite ends 22a and 22b of an attaching section 22 of a whetstone cover, the fixing screw 25 can be prevented from being removed from the end 22b of the attaching section 22 by fitting a rubber ring 26 to a threaded shank 25a of the fixing screw 25 between opposite ends 22a and 22b of the attaching section 22.

Abstract: A guard for a power tool with a rotatably driven insertion tool (14) is configured to cover at least portions of the insertion tool (14). At least one blocking means (32, 40) prevents the insertion tool (14) from turning around an axis of rotation (18).

Abstract: According to an aspect of the present invention, there is provided a power tool including: a wheel guard detachably attached to an attachment portion of the power tool; a fastening portion connected to the wheel guard; and a manipulation lever connected to the fastening portion at one end thereof so that the fastening portion is fastened to or released from the attachment portion by operating the manipulation lever, wherein the manipulation lever is moved to a first position in which the fastening portion is fixed to the attachment portion and to a second position in which the fastening portion is pivotable with respect to the attachment portion, and wherein, when the manipulation lever is positioned at the first position, the other end of the manipulation lever is positioned at an outer circumference of the wheel guard.

Abstract: The invention is based on a guard hood torsion preventer for a handheld power tool, in particular for a right-angle power sander. The invention is for preventing torsion of a guard hood on the handheld power tool, in particular in the event of damage to a tool. The guard hood torsion preventer includes at least one torsion-prevention unit which has a longitudinal axis, about which the torsion-prevention unit is rotatably supported.

Abstract: The invention relates to a portable power tool (19) for a rotating, preferably disk-shaped tool. Said portable power tool comprises a machine housing (18), having a machine neck (15) to which a protective hood (1) can be detachably secured to at least partially cover the tool. Said protective hood (1) comprises a protective hood neck (7) and a clamp (23) is provided for the detachable securing. In order to provide an anti-rotation lock (43) which is effective between the machine neck (15) and the protective hood (1), an engagement element (28) is arranged/configured on the clamp (23) and at least one recess (14) for the engagement element (28) to engage with on the protective hood neck (7) or on the protective hood neck (7) and on the machine neck (15).

Abstract: A key duplication system employs a modular key duplication attachment in combination with a high-speed, rotary powered tool and a profiled abrasive cutter. The attachment comprises a base, a carriage assembly movable relative to the base, a profiled stylus secured to the base, a first clamping vise for retaining a specimen key at a fixed (i.e., stationary) position relative to the carriage assembly and a second clamping vise for retaining a key blank at a fixed position relative to the carriage assembly. When so-retained, a bottom flat surface of the specimen key and a bottom flat surface of the key blank rest in a common working plane and the tip of each key is separated by a first distance. The cutter and stylus are aligned and secured to the base such that movement of the carriage, relative to the base, simultaneously brings them both into contact with appropriate surfaces of the key blank and the specimen key, respectively.

Abstract: The invention relates to a protective hood securing device for a portable power tool (12), especially an angle grinder. Said protective hood securing device comprises a protective hood unit (14), having a protective hood (16), and a securing unit (18) having at least one securing element (20) which is provided together with the protective hood unit (14) for protection in the event of a tool (22) breakage. For this purpose, the securing element (20) is at least partially configured by a protective cover (24) that is provided in addition to the protective hood (16).

Abstract: A key duplication system employs a modular key duplication attachment in combination with a high-speed, rotary powered tool and a profiled abrasive cutter. The attachment comprises a base, a carriage assembly movable relative to the base, a profiled stylus secured to the carriage, a first clamping vise for retaining a specimen key at a fixed (i.e., stationary) position relative to the base and a second clamping vise for retaining a key blank at a fixed position relative to the base. When so-retained, a bottom flat surface of the specimen key and a bottom flat surface of the key blank rest in a common plane and the tip of each key is separated by a first distance. The cutter and stylus are aligned such that movement of the carriage, relative to the base, simultaneously brings them both into contact with appropriate surfaces of the key blank and the specimen key, respectively.

Abstract: A portable power grinder has a housing, a rotating output shaft with a grinding wheel mounting device, a grinding wheel safety guard adjustable between angular positions defined by apertures in the safety guard, and a manually operable safety guard arresting device engageable with an aperture. The arresting device has a lock slide movable on the housing and operable by an articulated lever connected at one end to the housing and at another end to the lock slide and being shifted by folding and unfolding, thereby moving the lock slide between a safety guard arresting position and a safety guard releasing position and locking the lock slide in the arresting position. The lock slide includes a spring exerting a force onto the safety guard in the arrested position. A lock spindle displaceably supported on the lock slide moves between a retracted safety guard locking position and an advanced position to lock the output shaft.

Abstract: A protective hood assembly (6) for a tool machine (2) is formed of a housing with a protective hood (10), to a securing assembly (8, 8?, 8?) relative to the housing (4) in different rotary positions, wherein at least one lock-in part (30, 30?) is provided, which can be brought along a direction of installation (M) into a receiving region (36) of a locking housing (16) of the securing assembly (8) and at which, by rotating, can be brought into a bayonet-like engagement and wherein locking means (32, 32?) are provided on the protective hood, the locking means being capable of being locked in different locking positions with counter locking means (26, 26?) of the securing assembly (8). The receiving region (36) is limited on a side facing the housing (4) at least in part by an abutting wall (34, 34?, 34ä, 34?b), which is mobile.

Abstract: An amlodipine maleate pharmaceutical composition is provided with good stability when formulated with a pH within the range of 5.5 to 7, when measured as a 20 wt % aqueous slurry. The stability can also be aided by making the pharmaceutical composition from amlodipine maleate particles having an average particle size of greater than 20 microns, preferably greater than 100 microns.

Abstract: A guard for a rotary cutting tool allows for automatic adjustment of the guard relative to the cutting disc and to a workpiece. Such an automatic adjustment allows a user to cut around substantially the entire circumference of a rounded workpiece, such as a pipe, without requiring alteration of the angle at which the tool is held, repositioning by the user, or repositioning or removal of the guard. The guard includes a bracket for mounting the guard to the rotary cutting tool, a hood mounted to the bracket and enclosing a portion of the cutting disc, and a spring for biasing one end of the hood into substantially continuous contact with the workpiece during operation of the rotary cutting tool.

Abstract: In a chip collecting apparatus for a tip dresser of the present invention, a chip pickup case mounted on a dresser main body is divided into an upper case and a lower case, and the lower end of an arm admission port formed in the upper case is opened downward. During teaching operation, the lower case is rotated to open the lower end of the upper case, through which the insertion of a first gun arm into a lower chamber can be visually checked, and thus an electrode tip provided at the end thereof and a dressing body for dressing the end of the electrode tip are guided such that the central axes thereof conform to each other.

Abstract: The flange cover covering the blade is divided into two. The second cover is turnably connected to the first cover through a shaft parallel with the spindle of the blade, and the second cover is opened and closed in connection with vertical movement of the spindle. When the spindle is moved upward for replacing the blade, the second cover is automatically turned to the opening position, and L-shaped coolant jetting nozzles are moved away from positions below the blade to positions beside the blade. Thus, the blade can be easily replaced, and an automatic blade replacing system can be applied.

Abstract: A guide ring removal device. The guide ring removal device includes a column press, a first disc, a second disc, and a plurality of fasteners. The first disc is disposed on the column press. The second disc is disposed on a point of the column press to exert force on a carrier. The plurality of fasteners is disposed on the first disc, the fasteners grasping the guide ring. As the second disc exerts the primary force on the carrier, the fasteners generate reciprocal force on the guide ring, thus separating the guide ring. Engagement of the column press alters the distance between the first disc and the second disc, and the primary force is exerted on the carrier.

Abstract: A protective hood (1) for a right-angle grinder having a tightening device, which has a tightening band (4) firmly connected to the protective hood (1) for a right-angle grinder, the two ends (5, 6) of the tightening band being embodied as a first and second eyelet (7, 8), so that they form a first and second abutment (9, 10) and can be connected to one another under tension by means of at least two tightening elements, the first tightening element being a tightening lever (2), which with its first end (15) can be supported in the first eyelet (7) pivotably about a first axis (9a) and which can be brought into a first position in which the tightening device is not tightened, and into a second position in which the tightening device is tightened, becomes capable of being produced at less expense with still high quality by providing that the second tightening element is a spring (3), which can be connected movably to the tightening lever (2), the spring (3) being pivotably supported about a second axis (11) in

Abstract: A dust protection cover for a rotary grinding tool and having a base (1, 11, 21) fixedly securable with the tool housing (10) a substantially circular cover body (2, 12, 22) connectable with the base (1, 11, 21) for completely circumferentially covering the grinding disc (4, 14, 24) securable at the free end of the output shaft of the tool drive motor, and displaceable between a operational position, in which the cover body completely covers the grinding disc, and a release position in which the cover body exposes a portion of a grinding disc circumference, and a connection element(s) projecting from a side of the base (1, 11, 21) adjacent to the tool housing for securing the cover body (2, 12, 22) to the base (1, 11, 21) in the release position of the cover body.

Abstract: A protective cover detachably installed on a cutting machine/engraving machine combination including a main body and a protective cover. The protective cover is disposed with a fixing ring which can be directly tightened on an outer thread section of the main body. The gap of the split of the fixing ring can be changed by means of a tightening member so as to tightly engage the inner thread section of the fixing ring with the outer thread section of the main body without loosening. Therefore, the protective cover can be quickly and conveniently installed and taken off from the main body.

Abstract: A canopy for a wet saw including a cover member adapted for extending between the motor portion and the water pan of the wet saw. The cover member has a main panel and a pair of opposed side panel. An upper edge of the main panel has a pair of tabs extending upwardly therefrom. Upper fastening means are coupled with the tabs of the upper edge of the main panel of the cover member and with the motor portion of the wet saw to facilitate securement of the cover member to the wet saw. Lower fastening means are coupled with the main panel of the cover member upwardly of the lower edge thereof and with the water pan of the wet saw to facilitate securement of the cover member to the wet saw.

Abstract: A grinding unit for producing standardized tools such as end milling or slot cutters, reamers, twist drills, screw taps, and the like. The grinding unit has a grinding spindle holder that is adapted to be mounted on a base. At least one grinding spindle that has a grinding wheel is secured to the grinding spindle holder. A carriage is movable on guides on the grinding spindle holder. A workpiece holder is movable on guides on the carriage transverse to the direction of movement of the carriage. A protective housing is secured to the carriage and extends closely around the workpiece holder and the grinding wheel.

Abstract: The invention provides a guard arrangement including a guard member having an annular base provided with axially spaced apart first and second sets of radially inwardly extending and circumferentially spaced apart projections. The first and second sets of projections are circumferentially aligned and are alignable with axially extending grooves on a tool housing so that the guard member can be slid or snapped on and off the tool housing. To lock the guard member against removal from the tool housing, the tool housing is provided with a pair of annular grooves for receiving the projections on the guard member when the guard member is angularly shifted from a mounting position. To lock the guard member in a desired angular position, the guard member is provided with a finger-operated locking member that is engageable with detents located on the tool housing.