Abstract: A source of heat energy and a source of material for performing a material additive process upon the thin wall member is disclosed. A fixture is located relative to the thin wall element. The source of heat energy used for forming a joining member between the workpiece and the fixture to fixedly secure the fixture to the workpiece preventing the thin wall member from deforming when subject to the source of heat energy. A direct material additive process is upon the thin wall member adding material to the thin wall member to improve physical characteristics of the thin wall member. The joining member is mechanically removed from the workpiece after the work piece cools. A portion of the material is mechanically removed from the thin wall member to achieve desired dimensional characteristics.

Abstract: Provided are a welded joint of extremely low-temperature steel and flux cored, submerged, and gas metal arc welding materials which can be used to prepare the welded joint, wherein the welded joint of extremely low-temperature steel has outstanding impact toughness in extremely low-temperature conditions and excellent yield strength at room temperature.

Abstract: A solder alloy is a tin-silver-copper solder alloy substantially consisting of tin, silver, copper, bismuth, nickel, cobalt, and indium. With respect to the total amount of the solder alloy, the content ratio of the silver is 2 mass % or more and 5 mass % or less; the content ratio of the copper is 0.1 mass % or more and 1 mass % or less; the content ratio of the bismuth is 0.5 mass % or more and 4.8 mass % or less; the content ratio of the nickel is 0.01 mass % or more and 0.15 mass % or less; the content ratio of the cobalt is 0.001 mass % or more and 0.008 mass % or less; the content ratio of the indium is above 6.2 mass % and 10 mass % or less; and the content ratio of the tin is the remaining ratio.

Abstract: A lead-free, silver-free solder alloy includes 0.001 to 0.800% by weight copper, 0.080 to 0.120% by weight bis muth, 0.030 to 0.050% by weight nickel, 0.008 to 0.012% by weight phosphorus, and balance tin, together with unavoidable impurities. The solder alloy can be in the form of one of a bar, a stick, a solid or flux cored wire, a foil or strip, or a powder or paste, or solder spheres for use in ball grid arrays or chip scale packages, or other pre-formed solder pieces. The solder alloy can be used to create a solder joint between an electronic component and a pad of an electronic substrate.

Abstract: A high strength welding joint having excellent toughness at low temperature obtained by welding a cryogenic high-strength high-Mn steel, comprising 0.1-0.61 wt % of C, 0.23-1.0 wt % of Si, 14-35 wt % of Mn, 6 wt % or less of Cr, 1.45-3.5 wt % of Mo, 0.02 wt % or less of S, 0.02 wt % or less of P, 0.001-0.01 wt % of B, 0.001-0.2 wt % of Ti, 0.001-0.3 wt % of N, and balance of Fe and inevitable impurities; and a flux-cored arc welding wire comprising 0.15-0.8 wt % of C, 0.2-1.2 wt % of Si, 15-34 wt % of Mn, 6 wt % or less of Cr, 1.5-4 wt % of Mo, 0.02 wt % or less of S, 0.02 wt % or less of P, 0.01 wt % or less of B, 0.1-0.5 wt % of Ti, 0.001-0.3 wt % of N, 4-15 wt % of TiO2, 0.01-9 wt % of at least one of SiO2, ZrO2 and Al2O3, 0.5-1.7 wt % of at least one of alkali elements including K, Na, and Li, 0.2-1.5 wt % of at least one of F and Ca, and balance of Fe and inevitable impurities.

Abstract: Provided is a welding joint having remarkable impact resistance and abrasion resistance. The welding joint having remarkable impact resistance and abrasion resistance comprises 0.02-0.75 wt % of C, 0.2-1.2 wt % of Si, 15-27 wt % of Mn, 2-7 wt % of Cr, 0.025 wt % or less of S, 0.025 wt % or less of P, 0.001-0.4 wt % of N, and the balance of Fe and other inevitable impurities, and having a stacking-fault energy of 15-40 mJ/m2 at 20° C. Further provided are a welding joint having remarkable low temperature impact toughness and abrasion resistance, and a welding joint very preferably applied to a slurry pipe and the like used in the oil sand industry field related to oil production.

Abstract: Orbital welding device including a body, a welding head carried by one end of the body, and a device for holding the body on a tubular element to be welded, including: cantilever portions of the end of the body, which project in an overhanging manner transversely to a rotation axis of the welding head and beyond the rotation axis; a plurality of through holes formed through the cantilever portions transversally to these portions and to the rotation axis, positioned axially to the side of the welding head; a plurality of pneumatic devices accommodated in the through holes so that each device can selectively extract and lock in an extracted position toward the rotation axis a respective pin adapted to interact with the element to be welded; a pair of manifolds fixed in a laterally removable manner on the outside of the cantilever portions and in hydraulic communication with the through holes and compressed air supply conduits connected to a control box provided with an electrovalve controlled by a manually oper

Abstract: A device for assembling cams on a camshaft pipe of a camshaft may include a first gripper and a second gripper each configured for gripping and holding a respective cam. The first gripper and the second gripper may receive the respective cam in a common direction and may be movable in a common direction into alignment with respect to the camshaft pipe. The second gripper may be configured to grip and hold the respective cam that is pivoted by 90° with respect to an orientation of the respective cam in the first gripper.

Abstract: Various embodiments include methods adapted to displace turbomachine components from a location within a turbomachine. In some embodiments, a method of displacing a turbine bucket from a turbomachine wheel slot using a displacement apparatus, includes: detachably engaging an engagement arm of the displacement apparatus to the turbine bucket, the engagement arm attached to a linear actuator coupled to a body of the displacement apparatus, and the engagement arm adapted to be actuated in a first axial direction by the linear actuator; contacting the turbomachine wheel with at least two contacting portions of the body of the displacement apparatus; and displacing the turbine bucket from a position within a slot of the turbomachine wheel in the first axial direction by linearly actuating the engagement arm with the linear actuator.

Abstract: In a method for manufacturing a forging die with improved wear resistance, hot-work tool steel is obtained in which Al is added as a de-oxidizing agent during manufacture of the hot-work tool steel in a sufficient quantity such that it is only partially consumed during the de-oxidizing process, leaving Al in a range of greater than 0.015 weight percent after the de-oxidizing process. The forging die is shaped from the hot-work tool steel. By a subsequent nitriding process, a hardened surface is created on the forging die by heating in a nitriding atmosphere by interaction with the Al to improve a hardened surface on the hot-work forging die resulting in an improvement in wear resistance.

Abstract: An apparatus and method are described for inserting angle plates in transverse duct flanges. The apparatus is especially useful in inserting angle plates into transverse duct flanges of duct fittings. Packages for holding angle plates are also described.

Abstract: A chain-type tool magazine for detachably holding a plurality of pots on a chain and circulating the pots, provided with: U-shaped link members having openings for detachably holding pots, the link members having first rollers protruding on the side of the openings and second rollers on the side opposite from the opening; link members which do not have a roller; a chain assembly in which the plurality of link members are alternately joined by pins in an endless manner; guides for guiding the first rollers and the second rollers so that the chain assembly bends in the forward and reverse directions and circulates in a meandering manner; and driving means for circularly driving the chain assembly.

Abstract: According to one implementation, a drilling machine includes a drilling structure and a travelling machine. The drilling structure drills an object to be drilled composed of at least one structural object on a platy part. The travelling machine positions the drilling structure in a travelling direction of the travelling machine by travelling in a longitudinal direction of the at least one structural object using the at least one structural object as a guide.

Abstract: The invention relates to a handheld or semistationary machine tool or work tool, having a housing in which there is arranged at least one mechanical actuating device which emits noise, for example in the form of structure-borne sound, during operation of the machine tool or work tool. In order to further simplify the operation of handheld or semistationary machine tools or work tools and/or to increase the service intervals or lifetime thereof, the machine tool or work tool comprises at least one device for sensing noise that occurs during operation of the machine tool or work tool.

Abstract: A polishing apparatus includes: a turntable for supporting a polishing pad; a turntable rotation mechanism configured to rotate the turntable; a dresser configured to dress the polishing pad; and a scanning mechanism configured to cause the dresser to scan between a first position and a second position on the polishing pad, wherein Ttt/Tds and Tds/Ttt are a non-integer where the Ttt is a rotation cycle of the turntable during dressing, and the Tds is a scanning cycle during which the dresser scans between the first position and the second position.

Abstract: A retaining ring and a chemical mechanical planarization system (CMP) are disclosed. In one embodiment, a retaining ring for a polishing system includes a ring-shaped body having a polished inner diameter. The body has a bottom surface having grooves formed therein, an outer diameter wall, and an inner diameter wall, wherein the inner diameter wall is polished to a roughness average (Ra) of less than about 30 microinches (?in).

Abstract: The present disclosure relates to a technical field of manufacturing a display device, and more particular to a method and a device for controlling a grinding of a flexible substrate. The method includes: grinding an etching side of the flexible substrate; irradiating the flexible substrate with infrared rays or near infrared rays, receiving waves reflected by a side opposite to the grinding side and waves reflected by the grinding side of the flexible substrate respectively, and calculating a distance between the two sides based on the reflected waves; comparing the distance with a predetermined thickness of the flexible substrate in real time, and controlling an extent of grinding by a grinding device based on a difference of the distance from the grinding side to the side opposite to the grinding side of the flexible substrate and the predetermined thickness of the flexible substrate.

Abstract: A roller assembly for a rotary dresser comprise a plurality of axial segments which may be in the form of discs, each disc provided with an abrasive, radially outer surface. The discs are secured in axial alignment, each in a preconfigured rotational orientation. The disc assembly has a centrally arranged aperture for receiving a rotor shaft. The abrasive surface of the assembly can be accurately presented as an array of uniformly shaped abrasive units in a predefined pattern.

Abstract: The present invention is a centrifugal projector (1) for projecting projection material (2) toward a processing target, comprising a side plate (11), a plurality of blades (3) attached to the side plate, a rotary shaft (14) for rotating the side plate and the blades, and an introducing part (32) for introducing the projection material between the blades; wherein the blades (3) includes a projection surface (3a) for projecting the projection material, and the projection surface (3a) has a first part (3b) being a radial inner part of the blade and a second part (3c) being a radial outer part of the blade; the first part (3b) is formed to be pitched so that a radial outer side (3e) of the first part is positioned to a rear in the rotational direction (R1) compared to a radial inner side (3f) of the first part, and the second part (3c) of the blade is formed to be positioned to a front in the rotational direction (R1) of an imaginary line (L1) which extends the first part (3b) of the blade toward a radial outer s

Abstract: The present invention is a side plate unit (10) used in a centrifugal projector (1) which projects projection material (2) toward a processing target by rotating a plurality of blades (3), and the side plate unit (10) being provided to attach the plurality of blades thereto, the side plate unit (10) comprising: a pair of side plates (11); and a joining member (12) for joining the pairs of side plates; wherein guide channel portions (13) are respectively formed on mutually opposing surfaces of the pair of side plates (11); and the side plate guide channel portions (13) are formed to be pitched so that the radial outer side thereof is positioned to a rear in the rotational direction (R1) compared to the radial inner side thereof.

Abstract: The invention relates to an apparatus for producing CO2 pellets from CO2 snow, in particular, for a cleaning device for spraying surfaces to be treated with a mixed stream of a pressurized gas and CO2 pellets, includes a compressor device for compressing CO2 snow to form CO2 pellets. The compressor device includes a gear compressor. The gear compressor includes at least one compressor wheel which is mounted rotatable about a first rotation axis and has a plurality of compressing elements, and includes at least one intake wheel which has a plurality of snow intakes for accepting CO2 snow. The snow intakes are configured corresponding to the compressing elements. The intake wheel is mounted rotatable about a second rotation axis and cooperates with the at least one compressor wheel. The intake wheel includes an intake wheel sleeve with an intake wheel sleeve wall.

Abstract: A sheet of sandpaper includes a backing layer having opposed first and second major surfaces, an adhesive make coat on the first major surface, abrasive particles at least partially embedded in the make coat, thereby defining an abrasive surface, and a non-slip coating layer on the second major surface. Methods of making and using such sandpaper are also provided.

Abstract: A superhard polycrystalline construction comprises a body of polycrystalline superhard material comprising a first superhard phase having a first average grain size; and a second superhard phase having a second average grain size. The second superhard phase is located in one or more channels or apertures in the first superhard phase, the first superhard phase forming a skeleton in the body of superhard material. The second superhard phase is bonded to the first superhard phase by a non-superhard phase and the first superhard phase differs from the second superhard phase in average grain size and/or composition. There is also dis closed a method of making such a superhard polycrystalline construction.

Abstract: A fluid pressure cylinder comprises a rod insertion hole formed in a piston member, an auxiliary rod provided to a head side wall member so as to be inserted into the rod insertion hole, an open/shut valve mechanism for detection, and a fluid passage that is opened and shut by the open/shut valve mechanism. The open/shut valve mechanism includes a valve body reception hole formed in the auxiliary rod, a valve body that is movably held in the valve body reception hole and that has a recessed engagement portion on its external peripheral portion, and a spherical body mounted on the auxiliary rod so as to engage with the recessed engagement portion; when the piston member has reached a set shifting position, the valve body is changed over to the closed position or to the opened position due to cooperation between the spherical body, the recessed engagement portion, and the inner peripheral wall portion of the rod insertion hole.

Abstract: An object of the present invention is to provide an innovative opening-closing tool with extremely high product value. A first half-body 1 having a first operating part 1a on the distal end and a first handle part 1b on the proximal end and a second half-body 2 having a second operating part 2a on the distal end and a second handle part 2b on the proximal end have a cross-over pivot, and a biasing body 3 that abuts the second half-body 2 and provides an open bias on the two handle parts 1b, 2b is provided on the first half-body 1.

Abstract: A wrench socket includes a first end having a polygonal hole and a second end. A driving portion includes an inner driving portion defined in the second end. The driving portion further includes an outer driving portion on an outer periphery of the second end. The outer driving portion includes six abutment faces arranged in a circumferential direction about a rotational axis. A first indicia is recessed in each of three of the six abutment faces not contiguous to each other. Each first indicia indicates a size of the polygonal hole. A wrench socket set including wrench sockets of different sizes is provided.

Abstract: A silent socket wrench contains: a body, a driving, a cavity, a peripheral rib, and a C-shaped groove. A ratchet member is fixed on the peripheral rib and includes a plurality of teeth, a square recess, four retaining notches, and a through orifice for inserting a limiting element. When the ratchet member is accommodated in the cavity, among a vertical rim of each tooth, a tilted rim of each tooth, and the inner wall of the cavity is defined an operating space for mounting an elastic piece and a rolling shaft, and the elastic piece is retained between the vertical rim and the rolling shaft. A stop ring and a C retainer are fixed on the ratchet member in the cavity, and the C retainer is retained in the C-shaped groove. A connector is inserted into the square recess and includes two locking balls and a slot.

Abstract: A ratchet wrench includes a wrench body, a ratchet gear, a pawl and a switch assembly. The pawl has a central tooth, multiple first sub teeth and multiple second sub teeth in a concave surface thereof. Each of the first sub teeth and the second sub teeth has an inner side face abutting against opposing tooth face of the ratchet gear and an outer side face spaced apart from opposing tooth face of the ratchet gear. The first sub teeth and the second sub teeth are located symmetrical relative to the central tooth. The center of the concave surface of the pawl and the center of the ratchet gear are located on a common line that passes through the center of the central tooth of the pawl. The switch assembly is movably disposed in the head of the ratchet wrench for driving the pawl to engage with the ratchet gear.

Abstract: A clench wrench includes a structure defining a first body defining a handle and a second body integrated with the first body and defining an engaging head respectively. The second body has two opposite sides with one side defining a front side and the other side defining a back side respectively and includes an engaging space. The engaging space extends through the front and back sides and an opening is defined on both the front and back sides. One of the front and back sides includes a clenching member of a clenching device connected thereto. The clenching member is selectively movable between a first position blocking the opening of the engaging space adjacent to one of the front and back sides and a second position in which the opening of the engaging space adjacent to one of the front and back sides is not blocked.

Abstract: A remover for a sparker plug contains: an outer pipe, a pressing tube, a push rod, and a rotating lever. The outer pipe includes a first operating segment, a second operating segment, and a hollow cavity. The pressing tube abuts against the first operating segment and includes a hollow chamber communicating with the hollow cavity. The push rod is inserted through the hollow cavity and the hollow chamber. The push rod includes a raised section extending out of the pressing tube and includes a threaded section extending out of the second operating segment, wherein a diameter of the raised section is larger than the hollow chamber, and the push rod further includes a tilted guiding face formed on one end thereof adjacent to the raised section. The rotating lever abuts against the second operating segment of the outer pipe and screwing with the threaded section of the push rod.

Abstract: A wrench includes a handle and two sub-wrenches. The handle includes a shank and two pairs of prongs. Each pair of prongs is formed at a corresponding end of the shank. The prongs of each pair are separated from each other by a gap. Each of the sub-wrenches includes a lever and two pairs of sockets. The lever of each of the sub-wrenches is placed between and pivotally connected to a corresponding pair of prongs. Each of the sockets is transversely formed at a corresponding end of the lever and made with a hexagonal cavity of a unique size. Thus, the wrench is adapted for rotating nuts or threaded bolts of eight different sizes.

Abstract: A hex key has a hexagonal L-shaped body that includes a longer leg and a shorter leg vertically extending from the longer leg. The diameter of the L-shaped body ranges between 2 mm and 10 mm. The length of the shorter leg is greater than or equal to 50 mm. The length of the longer leg is given by the formula 0.3L2?L1?0.5L2, where L1 represents the length of the shorter leg, and L2 represents the length of the longer leg.

Abstract: A wrench includes a first member and a second member pivotally connected to the first member. The first member includes an engaging device having a biasing member, a first ball, a second ball, and a control member. One end of the biasing member biases against a bottom of the bore, and the other end of the biasing member biases against the first ball capable of abutting against the second ball. The control member is configured to exit or enter the first member. The second member includes a plurality of notches formed around an outer periphery thereof. When the control member exits the first member, the first ball biases against the second ball to abut against the second member. When the control member enters the first member, the control member abuts against the second ball to engage into one of the notches.

Abstract: A bit holder includes a body having a shank at its rearward end and a socket formed at its forward end to allow a tool bit to be inserted therein, a sleeve slidably disposed on the body, a collar detachably coupled to the sleeve, and a first magnet member disposed at a forward side of the collar to magnetize a fastener and retain the fastener engaged to the tool bit. The collar defines a through-hole to allow the tool bit to pass through, a forward groove for receiving the first magnet member, and a rearward groove for coupling the sleeve. The through-hole is disposed between the forward groove and the rearward groove.

Abstract: A screw releasing device with a guiding function includes a first housing, a control mechanism, and a guiding hole, the first housing defines a first receiving groove, the control mechanism is received in the first receiving groove, and includes a first cam, a second cam, and a third cam, the third cam includes a serrated member, the guiding hole receives a number of screws, and defines a first opening, when the first cam is not driven, the serrated member extends to the guiding hole via the first opening, so that the serrated member is at a supporting location and supports a bottommost screw, when the first cam is driven, the first cam drives the third cam to be not limited by the second cam and rotate, thus the serrated member is rotated to release the bottommost screw.

Abstract: A vacuum adapter for a power tool, with a bit holder extending from a front end of the power tool, is arranged to house the bit holder and to suck screws into alignment with a bit arranged inside the bit holder. The vacuum adapter includes: a connection part for connecting the vacuum adapter to the front end of the power tool such that the vacuum adapter covers the bit holder; a vacuum connection for connecting the vacuum adapter to a negative pressure source; a quick coupling for rapid disconnection of at least a part of the vacuum adapter in order to access the bit holder for exchanging bits; and a cover part arranged to cover the bit holder and that is connected to the connection part via a quick coupling and that may be separately disconnected from the power tool, leaving the connection part attached to the power tool.

Abstract: An assembly of the spaced apart cam pins (or longitudinal arms) for a wrench is provided which is radially biased with respect to the workpiece opening and retained by metal spring elements formed in circumferential rings, spaced apart along the length of the arms, and acting upon adjacent arms. These spring rings are protected by intervening retention rings used to secure the assembly into the wrench housing. One or more of the spring rings can be secured to the end face of the arms, by a locking interface with notches in the end faces. A circumferential ring used intermediate the end faces of an arm can use a dimension reduction of the arm cross section in order to secure the arm. Alternatively, using spring rings at each end of the arms, with a shielding retention ring adjacent each spring ring, permits the camming functionality of the assembly to be readily utilized in more conventional wrenches.

Abstract: A screwdriver includes a handle having a longitudinal axis. At the one end of the handle, the screwdriver includes a bit holder extending in the direction of the longitudinal axis or a screwdriver blade extending in the direction of the longitudinal axis. The screwdriver is further includes a drive mechanism in the handle. The drive mechanism causes a bit holder in the handle or the screwdriver blade opposite the handle to rotate. The drive mechanism includes a motor and a freewheel through which the motor can be coupled to the bit holder or the screwdriver blade. The freewheel is designed to relieve the torque when manual torque is introduced into the bit holder or the screwdriver blade through the handle. The drive mechanism further includes a torque limiter for limiting the drive torque of the motor on the bit holder or the blade.

Abstract: A de-mating apparatus includes a first component, a second component and a pair of parallel linear bearings. The first component includes a first pair of arms, each of the first pair of arms including a first lift surface. The second component includes a second pair of arms, each of the second pair of arms including a second lift surface. The second lift surfaces are parallel to the first lift surfaces. The linear bearings connect the first component to the second component such that the first pair of arms may move perpendicularly to the first lift surfaces between at least a first position adjacent to the second pair of arms and a second position apart from the second pair of arms to de-mate an electrical connector assembly. A bearing plane defined by the pair of linear bearings does not intersect the first pair of arms.

Abstract: A pull-off device is for a radially expandable bushing on a pivot pin. An end plate is arranged to rest against a bushing end face. The end plate is arranged to be attached to a pin end face via at least one first screw which extends through a cut-out in the end plate and into a threaded bore with a first thread diameter in the pin end face. A coupling element forms a releasable, axial connection between the end plate and the bushing. The end plate is provided with at least one threaded screw hole with a second thread diameter arranged in the axial direction of the end plate and is arranged to receive a second screw which, by axial displacement towards the pin end face, subjects the end plate and the bushing to a force directed axially outwards. A locking device for a bolt is described as well.

Abstract: A tensioning device for a thread end portion of a bolt has a cylindrical housing and a piston, moveable in longitudinal direction therein and connectable to a hydraulic supply. An interchangeable sleeve extends centrally through the piston. At its end it has an internal thread with engagement length to be screwed onto the thread end portion. The sleeve has a radially expanded portion carried axially by a carrier face of the piston. In order to prevent the sleeve from prematurely contacting the threaded bolt when mounting the bolt tensioning cylinder and prevent damage to the threads, the sleeve is moveable longitudinally relative to the piston. The longitudinal sleeve travel is defined by the carrier face as first longitudinal stop and by a second longitudinal stop. The longitudinal sleeve travel is at least equal to, preferably greater, than the engagement length of the internal thread of the sleeve.

Abstract: A floor nailing gun applicable to a floor having a lateral side with a recess structure or a protrusion structure includes a floor nailing gun main body that has a base plate for matching an upper surface of the floor, a supporting seat for matching the ground, and a positioning block used for matching the recess structure or the protrusion structure of the lateral side of the floor. The base plate and the supporting seat are respectively disposed on upper and lower sides of the floor nailing gun main body by a fastener. The positioning block is fastened between an end portion of the floor nailing gun main body such that the positioning block is positioned between the base plate and the supporting seat. The positioning block comprises at least two positioning surfaces.

Abstract: A nail set includes an elongated body having a longitudinal axis and a pivot axis. The nail set also includes a tool member supported by the elongated body at the pivot axis. The tool member includes a first end portion having a first punch tool and a second end portion having a second punch tool that is different than the first punch tool. The tool member is selectively rotatable about the pivot axis. The nail set further includes a locking member supported by the elongated body and is movable between a first position, where the locking member engages the tool member to inhibit rotation of the tool member about the pivot axis, and a second position, where the tool member is rotatable relative to the elongated body about the pivot axis.

Abstract: A fixing structure for a cylinder is employed to a pneumatic tool, and the pneumatic tool contains: a body, a valve unit, a cylinder, a piston member, and at least one positioning element. The body includes a cylindrical portion and a grip, the cylindrical portion has a chamber with an opening, and the cylindrical portion has at least one orifice. The valve unit is mounted in the chamber, and the cylinder is secured in the chamber to contact with the valve unit and includes a room and at least one locking notch. The piston member is placed into the room to push high pressure air to flow along the room. The at least one positioning element is inserted into each orifice of the cylindrical portion, such that a part of each positioning element retains with each locking notch, thus fixing the cylinder with the cylindrical portion.

Abstract: A handheld machine tool is disclosed. The tool has a tool receiving area and a striking mechanism. The striking mechanism contains a striker, an exciter, and a pneumatic chamber. The striker strikes an intermediate striker at the strike point. The exciter is driven between a first dead center at a distance from the strike point and a second dead center in the vicinity of the strike point. A housing, which is encapsulated in an air-tight manner, has an interior which is closed by an exciter end face facing away from the striker. The interior is connected to the pneumatic chamber by a first valve which can be closed by the striker and by a second valve which can be closed by the exciter. The first valve is arranged in the vicinity of the strike point and the second valve is arranged in the vicinity of the first dead center.

Abstract: A shock absorption device for a pneumatic tool, wherein a pneumatic tool contains: a body, a cylinder, a valve unit, and a piston member. The body includes a grip and a fitting sleeve fitted with the grip, wherein the fitting sleeve has a chamber, a close face formed on a first end thereof, and an opening formed on a second end thereof. The cylinder slidably is fixed in the chamber and a part thereof extends out of the opening, the cylinder includes a room and an abutting portion adjacent to the close face. The valve unit is fixed between the room and the abutting portion of the cylinder. The piston member is accommodated in the room and slides forward and backward along a movement axis. Plural buffer springs are mounted in the chamber and abut against the close face of the fitting sleeve and the abutting portion of the cylinder.

Abstract: A linear reciprocating motion device using an electric motor-driven drill is provided, the device converting the rotation of the electric motor-driven drill to a linear reciprocating motion with a simple structure.

Abstract: A protective cover for a power tool includes an impact absorbing boot configured to fit the genus of the power tool. The boot is adapted to cover the damage prone regions of the power tool and has an opening for inserting the tool and a fixer traversing the opening.

Abstract: Embodiments of a pole-attached power tool system, and related methods, are disclosed herein. In some embodiments, a pole-attached power tool system may include a pole having a first end, a second end, and an interior region; a handle disposed proximate to the first end of the pole; an electric motor disposed proximate to the first end of the pole; and a drive member disposed within the interior region, the drive member mechanically coupled with the electric motor and the power tool to transfer power generated by the electric motor to a power tool.

Abstract: A height adjustment lock system is disclosed. The system allows one to easily adjust the length of a pole or a handle. Such adjustment is useful with cleaning and maintenance devices as well as with tools and other implements. The height adjustment lock system has a locking handle that is movably attached to a braking cylinder. A multi section pole or handle is engaged with the braking cylinder. Movement of the locking handle causes the braking cylinder to frictionally retain the sections in a selected position, and further movement of the locking handle in an opposing direction causes the braking cylinder to release the sections for further height or length adjustment.