Abstract: In a method for producing a power storage device, a welding process includes welding a first long-side part through scanning of a laser beam from a second short-side part side to a first short-side part side of the first long-side part; and welding a second long-side part through scanning of the laser beam from a first short-side part side to a second short-side part side of the second long-side part. In welding the first long-side part, a first gas stream is generated, passing above the first long-side part from the first short-side part side to the second short-side part side. In welding the second long-side part, a second gas stream is generated, passing above the second long-side part from the second short-side part side to the first short-side part side.

Abstract: The present disclosure relates to laser devices for laser metal deposition and methods for laser metal deposition. A laser device for laser metal deposition on a substrate is disclosed. The laser device comprises: a delivery opening for delivering a wire or powder metallic feedstock to the substrate; a laser beam source configured to fuse the metallic feedstock with the substrate, the laser beam source being configured to emit a laser beam of a first power; a plurality of cameras configured to record images of a region of interest; and one or more light sources configured to illuminate the region of interest. The one or more light sources are configured to illuminate with a power of a blackbody radiation emitted during laser metal deposition.

Abstract: The present disclosure relates to laser devices for laser metal deposition and methods for laser metal deposition. A laser device for laser metal deposition on a substrate is provided. The laser device comprises a delivery opening for delivering a metallic wire to the substrate, a laser beam source configured to emit a laser beam for fusing the metallic wire with the substrate, and a force sensor for measuring a parameter indicative of a force exerted on the laser device by the metallic wire. The laser device is configured to obtain a first indication related to a distance between the delivery opening and the substrate based on the parameter indicative of a force exerted on the laser device by the metallic wire. Methods for laser metal deposition are also provided.

Abstract: A method for manufacturing a guide roller for hot wire rolling includes the steps of providing a guide roller made of an Al alloy, the guide roller including a wire guiding surface, and applying a coating onto at least a part of the wire guiding surface by a metallic wire Direct Energy Deposition (DED) operation and/or a metallic powder DED operation.

Abstract: The arc spot welding method for joining dissimilar materials, in which a first sheet (10) made of an Al-based material or an Mg-based material and a second sheet (20) made of ultra-high tensile steel having a tensile strength of 1180 MPa or more are joined, includes a step of forming a hole in the first sheet (10), a step of overlapping the first sheet (10) and the second sheet (20), a step of inserting a joining auxiliary member (30) made of steel, in which a hollow portion is formed, into the hole of the first sheet (10), and a step of joining the first sheet (10) and the second sheet (20) via the joining auxiliary member (30) using a welding material containing 13 mass % or more of Ni.

Abstract: An engraving machine may have a housing, a receptacle, and a laser head located within the housing. The receptacle may receive an item to be engraved. The laser head may have a laser generator. The engraving machine may have a gripper head to retrieve the item from the receptacle and to position the item relative to the laser head. The engraving machine may have a controller. The controller may receive an inscription to be engraved on the item, determine a distance of the laser head from the item, and position the laser head at the determined distance. The controller may also cause the laser generator in the laser head to emit a laser beam for engraving the item. Further, the controller may cause the gripper head to dispense the item into a dispensing bin.

Abstract: A laser manufacturing system includes a laser patterning unit having an optically addressed light valve and an image relay able to direct a patterned laser beam from the laser patterning unit against a part. In some embodiments the patterned laser beam can ablatively remove material from the part or induce selected chemical reactions or transformation in part material.

Abstract: Provided is a practical method for processing a gallium oxide substrate that enables the gallium oxide substrate to be cut vertically and horizontally in a lattice shape. Mechanical scribing processing in which a cut groove is engraved on a main plane by a scribing tool along a planned cutting line parallel to an X direction, which is defined as a direction parallel to an intersection line between the main plane and a plane (100), is performed using a gallium oxide substrate of which the main plane is the plane (001), laser scribing processing to be altered by scanning with a laser beam along a planned cutting line parallel to the Y direction is performed, and cutting is performed by break along planned cutting lines in the X direction and the Y direction after the mechanical scribing processing and after the laser scribing processing.

Abstract: A method for machining a metal-ceramic substrate (1), in particular for producing a predetermined breaking point, comprising: providing a metal-ceramic substrate (1) and forming a predetermined breaking point (7) in the metal-ceramic substrate (1) wherein the predetermined breaking point (7) has along a direction (V) thereof at least a first portion (A1) having a first depth (T1) and at least a second portion (A2) having a second depth (T2), wherein a second depth (T2) is realized, which is different from the first depth (T1).

Abstract: A method of laser bonding glass ceramic to metal foil includes contacting a first surface of a first glass ceramic substrate with a first surface of a first metal foil to create a first contact location between at least a portion of the first surface of the first glass ceramic substrate and the first surface of the first metal foil; and conducting a first welding step by directing a laser beam on at least a portion of the first contact location to bond the first glass ceramic substrate to the first metal foil and form a first bond location and a package. The first glass ceramic substrate has a thickness greater than or equal to 20 ?m and less than or equal to 250 ?m. The laser beam comprises a pulsed laser comprising a wavelength greater than or equal to 250 nm and less than or equal to 2 ?m.

Abstract: A bonding sheet according to the present invention contains a matrix resin; solder particles; and a fluxing agent. The bonding sheet has a surface with a surface roughness Sa of 2.5 ?m or less.

Abstract: Provided is a horn fixing device of an ultrasonic welding device for a secondary battery tab, the horn fixing device including an amplifier for ultrasonic welding of the secondary battery tab, a fixing block member having an amplifier through hole formed therein and configured to allow the amplifier to be installed therethrough, the fixing block member having a pad insertion space part formed at an upper portion of the amplifier through hole, wherein the pas insertion space allows an amplifier compression member to be installed therein, and the amplifier compression member installed in the pad insertion space part so as to compress the amplifier placed in the amplifier through hole, and a setting block member installed on one surface of the fixing block member to adjust an angle of the amplifier. The horn fixing device has an effect of uniformly pressing the amplifier by a press pad unit.

Abstract: A clamping apparatus for use in a laser welding system to provide compressive force to a plurality of connection tabs of a busbar assembly and press each connection tab of the plurality of connection tabs onto a corresponding terminal of an electrical cell of a cell array comprises a support part having a clamping face, and a plurality of clamping elements supported on the support part and extending from the clamping face. Each of the plurality of clamping elements is arranged to provide a compressive force, wherein each of the plurality of clamping elements comprises a peripheral outer wall and a central space configured to allow the passage of laser light therethrough to perform the laser welding.

Abstract: A positioning device for clamping an opening component, including a bracket; a guide rod supported by the bracket; a connecting block connected to the guide rod through threads and being capable of translating between a first position and a second position along the guide rod when the guide rod rotates with respect to the bracket; a follower through which the guide rod extends, the follower being capable of translating with respect to the guide rod; a supporting component connected to an end of the follower and configured to support the opening component. The positioning device also includes a pair of pressing arms, wherein each arm includes a clamping part, a first connecting part connected to the connecting block via a hinge, and a second connecting part connected to the follower via a first rotating shaft.

Abstract: Provided are systems and methods for repairing defects in metal pipes using a composite wrap repair system with diode laser curing.

Abstract: The present disclosure provides a method of manufacturing a turbomachinery component for a gas turbine engine, comprising: receiving an ideal design of the turbomachinery component, the turbomachinery component comprising: an aerofoil portion comprising an aerofoil surface and having an ideal aerofoil wall thickness; and a platform portion comprising a platform surface coterminous with the aerofoil surface, the platform portion having an ideal radial platform thickness along a radial direction; determining an intermediate design of the turbomachinery component comprising an intermediate platform portion having an intermediate platform surface and an intermediate radial platform thickness which is greater than the ideal radial platform thickness; forming, by an investment casting process, an intermediate turbomachinery component based on the intermediate design, wherein the intermediate turbomachinery component comprises at least one detectable reference feature formed by an internal core element during the in

Abstract: A fastener gun may include a driver configured to drive a fastener of a fastener strip a plate coupled to the driver, wherein the plate is configured to receive the fastener strip a nose piece coupled to the plate, wherein the nose piece is configured to hold the fastener strip adjacent the plate, and a feeder mechanism coupled to the plate and configured to advance the fastener strip towards the driver.

Abstract: A safety gate monitoring module is configured to monitor a state of a safety gate. A base device includes an actuator receptacle configured to receive an actuator and generates the safety gate signal in response to the actuator being inserted into the actuator receptacle. The base device includes a first interface, an axis, and a first end face arranged transversely to the axis. A mounting bracket includes a second interface configured to be coupled to the first interface of the base device in a first position, a second position rotated clockwise by 90° with respect to the first position, and a third position rotated clockwise by 90° with respect to the second position. The first and second interfaces include a mechanical blocking device that prevents coupling of the first and second interfaces in a fourth position rotated clockwise by 90° with respect to the third position.

Abstract: A cutting fluid circulation device includes a tank reservoir, a drum filter, and a pump. The tank reservoir stores cutting fluid discharged from a machine tool. The drum filter is disposed in the tank reservoir. The drum filter performs as a primary filter that filters cutting fluid. The pump pumps up cutting fluid in the tank reservoir. An annular flow channel in which the cutting fluid filtered by the drum filter circulates is formed in the tank reservoir. A part of the cutting fluid pumped up by the pump is fed to the drum filter, used for cleaning the drum filter, and then returned to the annular flow channel, and a part of the remaining cutting fluid is fed to a secondary filter disposed outside the tank reservoir, filtered by the secondary filter, and then returned to the annular flow channel.

Abstract: A display control device includes a calculation unit for calculating a first rotating speed on the basis of a vibration level detected by a vibration detection unit when the vibration level has exceeded a predetermined value, a change receiving unit for receiving a change instruction for changing a second rotating speed that is a rotating speed when the vibration level has exceeded the predetermined value to the first rotating speed, and a display control unit for performing control to display, on an operation screen, the first rotating speed, the second rotating speed, and a ratio display unit indicating a change ratio to a third rotating speed specified by a machining program, and performing control to display the first rotating speed at a position in the ratio display unit corresponding to a change ratio of the first rotating speed to the third rotating speed.

Abstract: A method for evaluating tool health with the temperature rising signal, applied to a machine tool that utilizes a tool to perform a removal process upon a workpiece, comprises the steps of: setting a target machining instruction; utilizing a processor to divide the target machining instruction into a residual machining instruction and a micro machining instruction; performing the residual machining instruction; without any coolant or with little coolant, performing the micro machining instruction, and having at least one thermal image sensor to detect a thermal image of a contact area of the tool and the workpiece; having the processor to derive a temperature feature by evaluating the thermal image; and, having the processor to compare the temperature feature with at least one threshold for determining the tool health.

Abstract: A highly convenient machine tool system is provided. An NC lathe as an example of the machine tool system includes a first tool post to which a first tool for machining a workpiece is attached, a numerical control unit adapted to control a movement of the first tool post according to a numerical control program, and a scanner adapted to measure a position and a shape of the first tool attached to the first tool post brought to a predetermined position under control of the numerical control unit.

Abstract: A platen apparatus includes a housing having multiple vents; a turbine wheel rotatably attached to a rear section of the housing, the wheel having a circular body and a circumferential face without a coating thereon, the body includes vanes, each vane being a hole which extends through the body from one side to an opposing side of the wheel; a support belt engaged in tension about the circumferential face of the wheel; and the rear section of the housing is at least partially open so that a portion of the circumferential face of the wheel is exposed outside the housing. The vanes are arranged adjacent to the vents, and each provide a flow channel through which air is drawn in from a first side of the housing through the wheel body and released at a second, opposite side of the housing.

Abstract: A chemical mechanical polishing apparatus has a platen to support a polishing pad, a carrier head comprising a rigid housing and configured to hold a surface of a substrate against the polishing pad, a motor to generate relative motion between the platen and the carrier head so as to polish the substrate, an in-situ carrier head monitoring system including a sensor positioned to interact with the housing and to detect vibrational motion of the housing and generate signals based on the detected vibrational motion, and a controller. The controller is configured to generate a value for a carrier head status parameter based on received signals from the in-situ carrier head monitoring system, and change a polishing parameter or generate an alert based on the carrier head status parameter.

Abstract: The present disclosure provides a tray assembly having a dual-structure. The tray assembly comprises an upper tray and a lower tray. The lower tray is capable of being easily disengaged from the upper tray by use of a dovetail joint that allows the lower tray to slidably move relative to the upper tray. The tray assembly also utilizes magnets to reduce the use of mechanical joints. The combination of the magnets together with the dovetail joint provides a quick and efficient way of sliding the lower tray in and out from the upper tray. The lower tray having a collection region collects any external, foreign materials generated during a chemical mechanical polishing/planarizing process. After the cleaning process, the lower tray can be slid back into the upper tray for use.

Abstract: A method for processing a wafer including; surface-grinding front surface of the wafer and back surface opposite to the front surface with a grindstone having a size of 10000 or more and, double-side polishing both sides of the wafer that has been surface-ground so that removal on the back surface is ¼ or less than that on the front surface. This method can also process a wafer capable of selectively roughening the back surface of a wafer and suppressing warpage of the wafer due to stress, and a wafer having a sufficiently roughened back surface and having a small warpage.

Abstract: A polishing pad comprising a polishing layer that has a polishing surface for performing a polishing process on an item to be polished, wherein the polishing layer includes hollow microspheres that form hollow bodies within the polishing layer, a cross-section of the polishing layer has an average pore diameter of 10-14 ?m, and in a histogram of pore diameters in a cross-section of the polishing layer where the bin width is 1 ?m, the sum of pores that are 25 ?m or greater is 5% or less with respect to the total number of pores in the cross-section, and the sum of the areas of the pores in each bin that is 25 ?m or greater is 20% or less with respect to the total area of the pores in the cross-section.

Abstract: Provided is a cylindrical grinder that is capable of automatically moving and fixing a tailstock in accordance with variations in length of a workpiece and enables improvement in its productivity. An NC cylindrical grinder includes: a table as a base; a headstock and an NC tailstock both arranged on the table; a moving mechanism configured to move at least either one of the headstock and the tailstock in a Z-axis direction; and a protective cover provided to the table and configured to protect the moving mechanism. In an area between the headstock and the tailstock and at a height position above the protective cover, a tooling base for mounting a tooling instrument thereon is arranged in a freely movable manner in the Z-axis direction. Provided is a guide mechanism for guiding the tooling base in the Z-axis direction and fixing the tooling base to the table at a required position.

Abstract: A chemical mechanical polishing apparatus has a platen to support a polishing pad, the platen having a recess, a carrier head to hold a surface of a substrate against the polishing pad and comprising a retaining ring to retain the substrate below the carrier head, a motor to generate relative motion between the platen and the carrier head so as to polish the substrate, an in-situ acoustic monitoring system comprising an acoustic sensor arranged in the recess that receives acoustic energy from friction between the substrate and the polishing pad and from friction between the retaining ring and the polishing pad, and a controller configured to generate a value for a carrier head status parameter based on received acoustic signals from the in-situ acoustic monitoring system, and change or polishing parameter or generate an alert based on the carrier head status parameter.

Abstract: A controller of a chemical mechanical polishing system is configured to cause a carrier head to sweep across a polishing pad in accord with a sweep profile. The controller is also configured to select values for a plurality of control parameters to minimize a difference between a target removal profile and an expected removal profile. The plurality of control parameters include a plurality of dwell time parameters. A relationship between the plurality of control parameters and a removal rate is stored in a data structure representing a first matrix which includes a plurality of columns including a column for each dwell time parameter and a row for each position on the substrate represented in the expected removal profile, and the controller is configured to, as part of selection of the values, calculate the expected removal profile by multiplying the first matrix by a second matrix representing control parameter values.

Abstract: The present technology relates to an information processing apparatus capable of more easily determining a maintenance timing by using event data. The information processing apparatus includes a state estimation unit that estimates a state of a grindstone by using event data supplied from an event sensor that outputs, as event data, a temporal change of an electrical signal obtained by photoelectrically converting an optical signal, and outputs a result of the estimation. The present technology can be applied to, for example, an information processing system or the like that tells a maintenance timing of a grindstone of a machine tool.

Abstract: A device (21) for controlling a spindle of a grinding machine (1) is disclosed. The spindle includes a rotor (5) supported by two radial magnetic bearings, one axial bearing, and a grinding wheel (6). The device includes a storage means (22) for storing control coefficients of the magnetic bearings. The device includes a means for determining a type of the grinding wheel and a type of the rolling bearing ring. A selection means (23) selects control coefficients associated with the determined types of grinding wheel and of rolling bearing ring from among the control coefficients stored in the storage means. The device also includes a means (23) for controlling the radial and axial magnetic bearings. Said means controlling the radial and axial (12) magnetic bearings on the basis of the control coefficients of the determined types of grinding wheel and of rolling bearing ring.

Abstract: The substrate processing apparatus according to the disclosure is a substrate processing apparatus for processing a substrate. The substrate processing apparatus includes a swing module, which includes a base portion, an arm which is supported by the base portion and is rotatable about the base portion, and a cover which covers an upper surface of the arm. The cover has an elongated shape in plan view and has a protrusion formed on an outer peripheral portion of an upper surface of the cover to protrude upward. The protrusion is provided to be continuous to a distal end which is an end on the side farther from the base portion of the upper surface of the cover in a longitudinal direction and both ends of the upper surface of the cover in a transverse direction.

Abstract: Disclosed herein are components, systems, and methods of operating an abrasive fluid jet system that recycles and reuses abrasive particles. The systems and methods described enable accurate metering and consistent feeding of wet abrasive particles thereby reducing the time and cost of operations associated with drying the recycled abrasive particles prior to reuse. The system may adjust a ratio of wet abrasive to dry abrasive being provided to a cutting head to form an abrasive fluid jet. Components of the system may overcome challenges associated with clumping and other issues that result in difficulty metering wet abrasive.

Abstract: A polishing apparatus includes a shank including a rotation shaft extending in a first direction, a first cushion unit covering a side surface of the shank and having a first hardness, a first film unit adjacent to the first cushion unit in a second direction crossing the first direction and covering a side surface of the first cushion unit, a second cushion unit disposed below the shank, having a second hardness different from the first hardness, and including a first part and a second part. The first part has a cylindrical shape and the second part is disposed below the first part and has a conical shape protruding in a direction opposite to the first part, and a second film unit covering the second part.

Abstract: A log handling tool for gripping a log between a pair of engagement members while using a spacer to facilitate positioning of the log includes a front engagement member and a rear engagement member opposing the front engagement member. The rear engagement member is fixed relative to a main arm, and the front engagement member is pivotable about the main arm such that a log can be gripped between the front and rear engagement members. A spacer is also coupled to said main arm and extends therefrom to facilitate positioning a log between the front and rear engagement members.

Abstract: A substrate holding member includes: a base body including an outer peripheral region and an upper surface including an outer periphery, a vent hole close to the outer periphery, a concentric imaginary circle passing through the vent hole, the outer peripheral region on an outer side of the imaginary circle; and a plurality of pin-shaped convex portions protruding upward from the base body; wherein at least a part of the pin-shaped convex portions arranged in the outer peripheral region are first pin-shaped convex portions that each include a first convex element and a second convex element, the first convex element protruding upward from the base body, and the second convex element protruding upward from an upper end surface of the first convex element and having an upper end surface whose area is smaller than an area of the upper end surface of the first convex element.

Abstract: An insulated solar wrench includes an elongated body and a pair of prongs at a first end of the elongated body, wherein the prongs are configured to release a first solar connector from a second solar connector. The wrench includes an open-ended wrench at a second end of the elongated body opposite the first end, wherein the open-ended wrench is configured to engage a first portion of the first solar connector. The wrench includes a slot passing through the elongated body and configured to allow a portion of the first solar connector to pass therethrough and engage a second portion of the first solar connector. The elongated body, the pair of prongs, and the open-ended wrench are formed of a metal material, and at least a portion of the metal material of the elongated body, the pair of prongs, and the open-ended wrench is covered by a plastic material.

Abstract: An impact tool includes a brushless motor having a rotor extending in a front-rear direction and disposed in a motor housing constituted by left, right and rear motor housings. A battery pack is disposed below the motor housing in an up-down direction. A plurality of first screws extend in a left-right direction and fix the left motor housing to the right motor housing. A plurality of second screws extend in the front-rear direction and fix the rear motor housing to the left and right motor housings. A fan is disposed between the rotor and the rear motor housing, a grip housing is disposed downward of the motor housing, and a planetary gear mechanism is disposed frontward of the motor. A spindle is disposed frontward of the planetary gear mechanism, a hammer is disposed on an outer circumference of the spindle, and an anvil is disposed frontward of the hammer.

Abstract: A power tool including a hammer, an anvil, and a spring having a stiffness indicating a trip torque value. A mode selection mechanism is configured to select between an electronic clutch mode and an impact mode. The electronic clutch mode includes an electronic clutch threshold that is less than a trip torque value. A load sensor is connected to the motor. The load sensor is configured to detect a load of the motor. A controller is connected to the mode selection mechanism, the current sensor, and the motor. The controller is configured to receive a mode selection signal from the mode selection mechanism, drive the motor in response to the mode selection signal, receive a load signal from the load sensor related to the load of the motor, and activate the electronic clutch when the load of the motor is greater than the electronic clutch threshold.

Abstract: An operation-free connection structure includes a main bar, a detent lever, a steel ball, a spring, and an operating member. Within the main bar, an elongated chamber is formed, featuring an elongated first hole and a second hole communicating with the chamber. Within the chamber, the detent lever is positioned and is recessed with a first groove and a second groove, with the first groove having a smaller depth than the second groove. The steel ball is located in the first hole and a spring exerts pressure on both the detent lever and the steel ball. This arrangement allows a portion of the steel ball to be embedded in the first groove while another portion protrudes outwardly from the main bar, and the steel ball can then be compressed and rolled into the second groove, thereby freeing the operation of the operating member from connection to an operating tool.

Abstract: A fastener strip magazine may include a plate and a post attached to and perpendicular to the plate, wherein the post is configured to rotatably support a spool configured to support a fastener strip. The spool may include a strap configured to wind about the spool and a clip attached to the strap and configured to attach to a first end of the fastener strip. The magazine may further include a guide bar attached to the plate and configured to direct a second end of the fastener strip to a feeder as the fastener strip uncoils.

Abstract: A power tool including a motor and an impact mechanism. The impact mechanism is coupled to the motor and includes a hammer driven by the motor, and an anvil positioned at a nose of the power tool, and configured to receive an impact from the hammer. The power tool also includes a sensor assembly positioned at the nose of the power tool, and an electronic processor. The sensor assembly includes an output position sensor configured to generate an output signal indicative of a position of the hammer or the anvil. The electronic processor is coupled to the output position sensor and to the motor, and is configured to operate the motor based on the output signal from the output position sensor.

Abstract: A magnetic ball joint press apparatus has first and second receivers at opposite ends of a clamp of the apparatus that employ permanent magnets to hold respective first and second ball joint adapters to the opposite ends of the apparatus. The permanent magnets holding the ball joint adapters to the opposite ends of the clamp of the apparatus significantly facilitate use of the apparatus.

Abstract: A fastener extractor and dislodging tool apparatus includes a torque-tool body, a threaded opening, a plurality of engagement features, and a release bolt. The plurality of engagement features that grips the lateral surface of the stripped fastener is radially positioned around a rotation axis of the torque-tool body. The plurality of engagement features being perimetrically connected around a base of the torque-tool body thus delineating a socket body that removes the stripped fastener. The threaded opening traverses through the base so that the release bolt can be threadedly engaged with the threaded opening, opposite of the plurality of engagement features. When the stripped fastener is jammed within the plurality of engagement features, the release bolt can be threadedly moved into the space between the plurality of engagement features thus dislodging the stripped fastener from the torque-tool body.

Abstract: Provided is a working machine with improved durability. A nail driver (working machine) includes a hitting portion that is formed in a rod shape extending about an axis line, an injection portion that abuts on an outer peripheral surface of the hitting portion, thereby guiding a movement of the hitting portion toward one side in the axial direction, and a supply portion that energizes a fastener toward one side in a direction intersecting with the axial direction, thereby supplying the fastener to the injection portion. The hitting portion has a tip part, and a center part provided at a position different from that of the tip part in the axial direction. At least a part of an outer peripheral surface of the tip part (tip part outer peripheral surface) on an anti-feeder side with respect to the axis line protrudes from an outer peripheral surface of the center part (center par outer peripheral surface) on a supply portion side with respect to the axis line.

Abstract: A portable linear fastener driving tool is provided that drive staples, nails, or other linearly driven fasteners. The tool uses a gas spring principle, in which a cylinder filled with compressed gas is used to quickly force a piston through a driving stroke movement, while a driver also drives a fastener into a workpiece. The piston/driver is then moved back to its starting position by use of a rotary-to-linear lifter, and the piston again compresses the gas above the piston, thereby preparing the tool for another driving stroke. The driver has protrusions along its edges that contact the lifter, which lifts the driver during a return stroke. A pivotable latch is controlled to move into either an interfering position or a non-interfering position with respect to the driver protrusions, and acts as a safety device, by preventing the driver from making a full driving stroke at an improper time.

Abstract: An electric nail gun includes a main body unit, a hammer unit, and a motor unit. The hammer unit includes a hammer member that is adapted for striking a nail, and a resilient member that has two opposite ends respectively abutting against the hammer member and the main body unit. The resilient member of the hammer unit constantly provides a hammer restoring force for the hammer member to move in a striking direction for striking the nail. The motor unit is mounted to the main body unit, and includes a lifting wheel. The lifting wheel has at least one pushing portion that separably engages the hammer member, and that is operable to push the hammer member to move in an energy storage direction opposite to the striking direction such that the resilient member of the hammer unit is compressed and provides the hammer restoring force to the hammer member.

Abstract: A driving device, comprising a hand-held housing with a piston element arranged therein for transmission of energy to a fastening element to be driven in a driving direction, a propellant charge, and a combustion chamber, which is arranged between the propellant charge and the piston element and extends around a central axis, and an actuator, by which energy to be transmitted from the propellant charge to the piston element can be varied in such that the energy can be set, wherein the combustion chamber has an internal thread and a cylindrical guiding portion, wherein the actuator is arranged in the combustion chamber and has an external thread in engagement with the internal thread and a bearing for mounting the actuator in the guiding portion, wherein a thread gap spacing between the external and internal threads is greater than a bearing gap spacing between the bearing and the guiding portion.

Abstract: A powder actuated fastening tool including a charge advance apparatus for advancing a powder charge strip relative to a barrel of the tool, wherein the charge advance apparatus includes a rotatable ratchet having teeth for engaging receptacles formed in the powder charge strip, and a charge advance member coupled to a trigger of the tool, wherein the charge advance member acts on the rotatable ratchet to rotate the ratchet in response to actuation and/or release of the trigger, such that the rotation of the ratchet causes advance of the powder charge strip relative to the barrel.