Abstract: A fastener driving apparatus featuring at least one gas spring and a drive mechanism, comprising a plurality of lifters, for selectively engaging and disengaging said at least one gas spring to energize the gas spring. The lifters the gas spring to energize the gas spring and thereafter release the gas spring, wherein the gas spring releases a portion of its potential energy and accelerates an anvil to engage a fastener. The lifters may engage the gas spring at the same time for a portion of the operational cycle of the apparatus, and the operational cycle may include an intermediate stopping point, which after resumption of a lifter on the gas spring after the stopping point, a relatively small increase of energy in the gas spring thereafter is required to generate a sufficient energy in the gas spring to effectively drive a fastener.

Abstract: A treatment device includes a housing having a longitudinal axis extending between a proximal end and a distal end, a motor, a drive shaft operatively coupled to the motor, a compression spring at least partially disposed about the drive shaft, a helical cam disposed adjacent the compression spring, the helical cam having at least one discontinuity, a hammer coupled to the helical cam and moveable therewith, and a tip disposed adjacent the distal end.

Abstract: A fastener driving device includes a fastener and at least one gas spring. Additionally, the fastener driving device includes a drive mechanism, the drive mechanism being capable of selectively engaging and disengaging the at least one gas spring, the at least one gas spring capable of moving to an energized position upon being engaged by the drive mechanism. Additionally, the device includes an anvil, wherein the drive mechanism includes a first lifting mechanism and a second lifting mechanism, wherein the first lifting mechanism actuates the at least one gas spring for a portion of an operation cycle, and the second lifting mechanism thereafter actuates the at least one gas spring for a subsequent portion of the operation cycle before the drive mechanism ceases applying a force on the at least one gas spring and the at least one gas spring releases a portion of its potential energy and accelerates the anvil to drive a fastener.

Abstract: In a tool attachment for a handheld power tool, which includes a tool housing having a fastening interface, having an attachment housing, on which a locking unit, for locking the tool attachment on the fastening interface of the handheld power tool, and a tool receptacle for accommodating an insert tool are situated, a percussion mechanism is situated in the attachment housing, which is configured to apply percussions carried out in the axial direction in relation to the tool receptacle to an insert tool, which is situated in the tool receptacle, during percussion operation of the tool attachment, the tool receptacle being fixed in position in the attachment housing in a non-rotating way at least during percussion operation.

Abstract: An electric nail gun structure is disclosed. A gun head seat body is formed into a structure with inner and outer cover layers, allowing a rotating rod and a slide piece moving a pull nail linearly to be configured inside it; the gun head seat body is formed completely by having a steel sleeve with equidistantly spaced slide chutes on the inside thereof covered with a plastic contact layer, where the slide chutes allows projecting ribs configured on the steel slide piece to be in engagement therewith so that a stable and safe nail pull operation can be obtained. Furthermore, a length extensible and width adjustable auxiliary handle rod is configured on the outside of the gun head seat body allowing nail gun seat bodies for all kinds of electric, pneumatic drills to be operated conveniently and safely with one single hand.

Abstract: A valve top includes a head piece which is centrally penetrated by a spindle which is rotatably mounted in the head piece around its longitudinal axis and via which a control disk can be rotated relative to an inlet plate abutting the same, wherein a control sleeve having a control contour is arranged within the head piece on the spindle, and a guide sleeve having a guide contour is arranged opposite the control contour, which control sleeve and guide sleeve interact in such a way that after actuation of the control disk via the spindle into a defined direction, an autonomous return movement of the control disk into its starting position is effected.

Abstract: A force-limiting and damping device has a body, a tapping element, and an elastic element. The body has a connecting segment and a holding segment. The connecting segment is formed on an end of the body and has a mounting hole. The holding segment is formed on the body opposite the connecting segment. The tapping element is connected to the body to move relative to the connecting segment. The elastic element is mounted between the tapping element and the connecting segment to abut against the tapping element and to enable the tapping element to move relative to the connecting segment. The structural relationship between the connecting segment, the tapping element, and the elastic element may provide a delayed rebound and damping effect to the reaction force, and the applied force is continuously transferred to a tapping object. This may reduce noise and the loss of energy.

Abstract: A hand tool device has a hammer mechanism including a hammer, at least one curve guide which drives the hammer at least during the hammer drilling operation, and at least one hammer mechanism spring which (i) stores at least a part of an impact energy in at least one operating state, and (ii) holds the hammer in the peripheral direction in at least one operating state.

Abstract: A fastening tool is provided with a housing having a fastener outlet. A striker is mounted for translation in the housing to drive a fastener from the fastener outlet in an unloaded position. A biasing member cooperates with the striker to urge the striker towards the unloaded position. A motor is oriented in the housing. A cam is driven by the motor, and has a cam surface in cooperation with the striker such that rotation of the cam translates the striker to a loaded position and to a release position whereby the biasing member drives the striker to the unloaded position. The cam surface is profiled to require a constant torque from the rotary input during translation of the striker to the loaded position while loading the biasing member.

Abstract: A hand-held drive-in power tool for driving-in fastening elements includes a drive-in ram (13) displaceably arranged in a guide (12), a drive (30) for driving the drive-in ram (13) and having at least one driving spring member (31) for displacing the drive-in ram (13) and formed of a fiber-reinforced plastic material, and a device (70) for preloading the driving spring member (31).

Abstract: A plurality of weight hammers (7,8) are provided, and each of the plurality of weight hammers has a shape for substantially evenly applying a hammering force with respect to a surface to be hammered of an object to be hammered (11), about a center line of the object to be hammered. Rotors (9, 10) for driving the weight hammers (7,8) are provided to the same rotating shaft (22) in such a positional relation that an engagement claw (9a) of one rotor (9) engages and drives one weight hammer (7), and, when engagement of the weight hammer (7) is released, an engagement claw (10a) of another rotor (10) in driving engages another weight hammer (8). The rotors are driven by the same driving means (26).

Abstract: A power tool with a motor, a transmission and a rotary impact mechanism. The transmission receives rotary power from the motor and includes a transmission output member. The rotary impact mechanism has a first spindle, a second spindle, a hammer and an anvil. The second spindle is disposed coaxially with the first spindle and the hammer is drivingly coupled to the second spindle. The power tool also includes a device that selectively couples the first and second spindles with the anvil and the transmission output member. Coupling of the first spindle with the anvil and the transmission output member directly drives the anvil, whereas coupling of the second spindle with the anvil and the transmission output member drives the anvil through the hammer.

Abstract: An impact wrench 1, with a motor for transmitting a rotary movement to a spindle 2 located in a hammer cage 11 and with a cam drive 9, on the end face 12 of which a track 13 with an elevation 14 is located, is used to transmit frictional movement to the bolts to be tightened. In conjunction with the hammer cage 11, the cam drive 9 forms a channel 15 for the rotation of a ball 16 and engages in axially-displaceable pins 6, 7, which compress a spring 17 ensuring a return to the starting position by a displacement movement on a collar 3 surrounding the spindle 2 and triggering the hammer mechanism. A link 8 is provided between the pins 6, 7 and the collar 3 to transmit principally frictional movement between the pins 6, 7 and the spindle 2.

Abstract: It is an object of the invention to provide an effective technique for achieving a smooth driving operation with a driving power tool for driving a driving material into a workpiece. A representative driving power tool for driving a driving material into a workpiece is provided with a coil spring, an operating member. The power tool fixer includes a rotating element that rotates in a normal direction it the spring force of the coil spring as the drive member drives the coil spring, an outer edge of the rotating element, an engaging member and a lock avoiding mechanism. The outer edge includes a first outer edge portion and a second outer edge portion, a first vertical wall and a second vertical wall. The engaging member defines a working stroke of the driving operation.

Abstract: A transmission mechanism for an electric nailing gun includes a motor, a driving wheel connected to an output shaft of the motor and having an eccentric rod, and a wear-resistant ring rotatably mounted on the eccentric rod for enabling the eccentric rod to push a slide of a nail striking mechanism of the electric nailing gun without producing much friction during rotation of the driving wheel along with the output shaft of the motor.

Abstract: Percussion device, includes a housing and two movable bodies, an impact body for an impact pin protruding from the housing, and a balancing body for counterbalancing impact motions of the impact body. The housing includes springs, which constantly strive to bring the bodies towards each other and against the action of which the bodies may be separated axially. The balancing body is rotatable, via a drive spindle connected to a driving source the spindle being mounted in a bearing member, at least one of the bodies including an oblique surface, which, by contact against the other body, transforms the rotary motion of the balancing body into axial motions of the impact body. Rotation of the bearing member is prevented by a helical pressure spring attached to the bearing member and the housing. In this way, tangential vibrations cannot be transferred from the drive spindle to the housing.

Abstract: A battery-powered impact wire insertion tool that employs an electric motor to implement the impacting function. The electric motor is provided with suitable gearing that reduces its speed but increases its torque. An activator mechanism is employed to convert multiple revolutions of the motor shaft into a stored compressive force that after a predetermined number of shaft revolutions is triggered to release the compressive force to drive a hammer against an insertion blade mounted in the tool. The activator mechanism comprises axially-aligned cylindrical end cams with generally complementary surfaces that upon rotation of a driven cam axially extends a follower cam compressing a power compression spring, and upon encountering a cam lobe the driven and follower cams abruptly come together releasing the spring delivering the desired impact to the blade.

Abstract: An impact driver (1) includes a main housing (2) encasing a motor (5); an internal gear case (8) which is secured by screws to the main housing (2) and is provided with an externally threaded portion (12); and a hammer case (13) with an internally threaded portion (14) which is adapted for threadable engagement with the externally threaded portion (12) of the internal gear case (8) so as to couple the hammer case (13) to the internal gear case (8). The impact driver (1) additionally includes a rotation stop mechanism comprised of a rack (24) disposed within a forward extending portion (23) of the main housing (2) for meshing with dimples (27) formed in the outer surface of the hammer case (13). By fixing the rack (24) with a feed screw (26) disposed transversely in the forward extending portion (23), the hammer case (13) is prevented from rotation with respect to the internal gear case (8) after assembly of the impact driver (1).

Abstract: In order to avoid the recoil of the striker in a hammer device (tool machine) with a striker (18) that can be accelerated to strike velocity, and a tool carrier (14) receiving the impact of said striker, the invention proposes to arrange the striker (18) between the tool carrier (14) and a corresponding mass carrier (16) which moves together with the striker (18) until the striker (18) strikes the tool carrier (14), imparting its own momentum via the striker to the tool carrier, with a supplementary mass (56) on the mass carrier (16) providing the necessary striking energy.

Abstract: A cable-cutting apparatus includes a housing, a cutter rod with a fixed blade, an impact rod, a resilient unit for biasing the impact rod to press against the cutter rod, a rotating unit, and a driving unit. Normally, an engagement surface of the impact rod abuts against an engagement surface of the cutter rod. When the blade presses a cable against a planar surface, and when a switch of the driving unit is actuated to rotate the rotating unit, the engagement surface of the impact rod moves rearward away from the engagement surface of the cutter rod against the biasing action of the spring until the push rod reaches a rear limit position, after which the impact rod is biased by the spring to move forward to impact on the cutter rod, thereby cutting the cable with the blade.

Abstract: A cable-cutting apparatus includes a housing, a cutter rod with a fixed blade, an impact rod, a resilient unit for biasing the impact rod to press against the cutter rod, a rotating unit, and a driving unit. Normally, an engagement surface of the impact rod abuts against an engagement surface of the cutter rod. When the blade presses a cable against a planar surface, and when a switch of the driving unit is actuated to rotate the rotating unit, the engagement surface of the impact rod moves rearward away from the engagement surface of the cutter rod against the biasing action of the spring until the push rod reaches a rear limit position, after which the impact rod is biased by the spring to move forward to impact on the cutter rod, thereby cutting the cable with the blade.

Abstract: A self-contained impact driver includes an internal hammer, hammer spring and trigger. Pressing the driver against a fastener compresses the spring progressively until the end of the stroke, at which time the hammer is released by the trigger. The trigger both compresses the hammer spring, and releases it. Rotary impact force is applied to the fastener in a selected clockwise or counterclockwise direction.

Abstract: A module jack wire crimping/cutting tool is constructed to include a barrel supported on a spring in a tubular handle, two arched stop elements forced by springs to releasably close the rear end of the barrel and to stop a spring-supported bolt in the barrel, and a stem moved in and out of the front end of tubular casing to hold a crimping/cutting block, which is forced by the spring-supported bolt to crimp and cut electric wires at a module jack upon forward movement of the tubular casing relative to the barrel after attaching the crimping/cutting block to the module jack.

Abstract: The present invention provides an impact shaft for use in a pneumatic wire termination tool. The tool has a handle, a pneumatically driven piston and a head frame for engaging and terminating a plurality of wires to a corresponding connector at the same time. The impact shaft includes a plurality of coaxially arranged cylindrical sections positioned end to end, including a dowel pin positioned at a first end and a head frame locator having the dowel pin projecting from a first end and an extension portion projecting from a second end. The dowel pin and the head frame locator are sized to operatively engage the head frame. A spring register portion includes a first end from which the extension portion projects, and also includes a plurality of facets arranged for engagement with a biased portion of the tool so as to maintain the rotational orientation of the impact shaft relative to the handle.

Abstract: A portable apparatus for driving a post into the ground is provided in an embodiment. The apparatus has a base removably attachable to the post as well as a hammer module tethered to the base to permit vertically reciprocating motion of the module relative to the base and post. The apparatus may be motor driven with rotating, eccentrically mounted cams providing the mechanism for creating a hammering force through reciprocating motion. The hammer module has a face which imparts the hammering force to the top of the post. A method for using such an apparatus is provided in a further embodiment.

Abstract: A device for transmitting pulsed axial percussions to a drill (12) and including a housing (2) one end of which is releasably connectable with a housing (3) of a hand-held rotary drill, a rotation transmitting element (7, 9) rotatably supported within the housing (2) and operatively connected with a rotatable spindle (4), which projects from the rotary drill housing (3), for joint rotation therewith, a chuck (11) provided at an end of the device housing (2) opposite to the one end for receiving the drill (12), a reciprocating hammer member (15) movable into an abutting engagement with a trailing end of the drill (12), and a hammer mechanism (17-20; 21-24) arranged within the device housing (2) for imparting pulsed axial percussions to the hammer member (15) and connected with the rotation transmitting element (7, 9) for generating the pulsed axial percussions.

Abstract: A miniature impact tool in which a cam and cam follower assembly is utilized for moving a striker backward by converting rotary motion of a drive shaft to a linear motion. The striker is in contact with a spring/guide pin (plunger) assembly and is moved away from a surface to be struck during a portion of the rotation cycle of the cam. On further rotation the cam surface is cut away and spring action drives the striker forward, causing impact of a cutting tool (chisel) against a workpiece. A plurality of cam lobe surfaces provides predetermined and reproducible impact forces of the cutting tool on the workpiece, even during vibration of the tool. To minimize damage to the cam and cam follower when the tool is over speeded, an elastomeric cam or a cushioning coating or sleeve prevents adverse contact (such as metal-to-metal contact) between the cam and cam follower.

Abstract: Apparatus for applying additional momentum to the movement of a body adapted to reciprocate or flex through a substantially linear or arcuate path, notably of increasing the impact velocity of a linearly travelling weight upon an object. The apparatus includes an element for retracting the body from its rest position, notably for retracting a weight from the point of impact between the weight and an object located at the rest position of the weight and an element for biasing the body towards its rest position, notably for urging the weight towards the object so as to impart additional impact velocity to the weight as it travels toward the object. The apparatus is characterized in that: a) the element for biasing the body towards its rest position is an elastic polymeric material which is retained under tension or compression when the body is in its rest position; and b) the biasing element is one which undergoes strain crystallization. Also a method for breaking or penetrating a surface using the apparatus.

Abstract: An electric powered multiple impact fastener driving tool comprising a handle portion, a main body portion, a guide block, a magazine, and a guide and biasing assembly mounted in the guide block and affixed to the magazine enabling shifting of the magazine within the guide block between an extended fastener starting position and a retracted fastener driven position. The main body portion contains an impact assembly comprising a motor driven cam wheel with a single drop-off, a cam follower roller mounted on a reciprocable hammer, a compression spring surmounting and abutting the hammer, and a fastener driver. For each rotation of the cam wheel, the cam follower roll lifts the hammer, compressing the spring and storing energy therein. At the cam wheel drop-off, the cam follower wheel and hammer drop under the influence of the spring and the hammer impacts the driver which imparts a blow to the fastener. The cam follower wheel does not contact the cam wheel immediately after drop-off.

Abstract: A reversible rotary wrench includes an impact mechanism for applying intermittent torque impulses to a load. The mechanism includes a rotatable shaft having an axis and adapted to be coupled to a motive source, a rotatable anvil for coupling to the load and having a pair of anvil ears, a tubular hammer substantially coaxial with the shaft and having a pair of hammer ears engageable with the anvil ears and a rotatable tubular drive coupling member substantially coaxial with the shaft. The mechanism also includes a first helical cam structure coupling the drive coupling member to the shaft, a second helical cam structure coupling the drive coupling member to the hammer, and a spring biasing the hammer axially toward the anvil to engage the hammer ears with the anvil ears.

Abstract: A miniature impact tool in which a cam is utilized for moving a striker backward by converting rotary motion of a drive shaft to a linear motion. The striker is in contact with a spring/guide pin (plunger) assembly and is moved away from a surface to be struck during a portion of the rotation cycle of the cam. On further rotation the cam surface is cut away and spring action drives the striker forward, causing impact of a cutting tool (chisel) against a workpiece. An improved mechanism utilizing a plurality of cam lobe surfaces provides predetermined and reproducible impact forces on the cutting tool. This mechanism is not adversely affected by vibration of the tool.

Abstract: A pistol-configured, electrically operated impact tool for seating and cutting a wire includes a D.C. motor whose output shaft has transversely extending, cam surface-engaging elements that engage a cam-configured impact element. As the output shaft is rotated by the operation of the D.C. motor, the cam surface-engaging elements are rotated to an angle where they begin to engage cam portions of the impact element. As a result of this engagement, the impact element is linearly translated away from the cutting tool holder and toward the electric motor. During this linear translation of the impact element away from the cutting tool holder, a bias spring is compressed, so as to increase the force stored in the spring. Eventually, the output shaft will be rotated to an angle brings the cam surface-engaging elements into alignment with a prescribed feature of the cam portions of the impact element.

Abstract: This invention relates to a transmission mechanism for an electric stapling gun and in particular to one including a cam fixedly mounted on an output axle of a gearing of the electric stapling gun and having two lobes such that an angle between the lines joining the two lobes to the center is less than 180 degrees. The transmission mechanism also has a hammer movably mounted in a groove formed in front portion of the electric gun and having a U-shaped member with an open end towards the cam, whereby when the cam is rotated, one pin of the cam will urge the U-shaped member of the hammer to compress a spring and then the other pin of the cam will urge the hammer in succession to further compress the spring.

Abstract: A miniature impact tool in which a cam is utilized for moving a striker backward by converting rotary motion of a drive shaft to a linear motion. The striker is in contact with a spring/plunger assembly and is moved away from a surface to be struck during a portion of the rotation cycle of the cam. On further rotation the cam surface is cut away and spring action drives the striker forward, causing impact of a cutting tool (chisel) against a workpiece. Excessive wear of the drive shaft is eliminated using a specific design of a shelf upon which the striker moves, as well as a sleeve bearing around the drive shaft in the area of possible wear. The striker is provided with a guide structure (such as a recess) into which the nose of the plunger fits in order to provide controlled guidance of the striker in its longitudinal movement. The output shaft of the tool accepts removable collets of varying shapes in order to accommodate chisel tools having different shank geometries and sizes.

Abstract: In a method of operating a ram boring machine having a rotatory-thrust drill rod an impact force is applied to the rear end of the drill rod. The boring machine includes a thrust unit and a striking tool that are combined to form a thrust/percussion aggregate.