Abstract: A pneumatic motor with built-in striker mechanism mainly includes a cylinder, rotor set and output shaft lever. The rotor set has a rotary drum and flexible blades. The output shaft lever can be driven by the rotary drum. A chamber is formed into the rotary drum and a striking portion on the output shaft lever is located within the chamber. The built-in striker mechanism is placed in the chamber and has striking bulges protruded on the striking portion, movable hammers sleeved externally on the striking bulge and struts axially located on the rotary drum. This new pneumatic motor has the striker mechanism set into the rotary drum of the rotor set, thus reducing greatly the axial length and volume of the pneumatic motor and realizing ease-of-use.

Abstract: A hand tool device has a tool spindle and a hammer mechanism which includes a hammer and at least one curve guide driving the hammer at least during a hammer drilling operation. The tool spindle has at least one bearing surface on which the hammer is movably supported in at least one operating state.

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: Disclosed are methods and devices utilizing magnetized components to assist operation of an internal mechanism of a tool. Magnetic fields can assist a power tool comprising internal mechanisms that cycle very quickly. Magnetized components can assist in a load/reset action relative to internal components of the power tool. In one example, one or more hammers of a hammer drill/driver can be reset more efficiently when various magnetized elements are oriented in certain ways relative to one another. Additionally, friction between components can be reduced by repulsive magnetic fields between two or more components. Utilizing the magnetic fields can improve the overall function of internal components of the tool. In another example, a tool such as a nailer or stapler can utilize magnetism to assist its internal components. In a nailer or stapler the magnetism can assist, for example, acceleration and deceleration of components utilized to drive the nail/staple.

Abstract: An anchor setting tool includes a housing having a nozzle portion formed in an upper end thereof. A motor and a rotary-linear motion transmission mechanism are arranged in the housing and the rotary-linear transmission mechanism functions to couple an output shaft of the motor to a striking rod disposed in the nozzle portion to thereby move the striking rod in a reciprocating manner. A bias device exerts a force on the striking rod towards the outside of the housing along a longitudinal direction of the striking rod.

Abstract: A handheld tool apparatus having a tool guidance unit, which has a tool spindle and a tool chuck, and having an impact mechanism which has a striker that in at least one operating state percussively drives the tool guidance unit. It is provided that a mass of the striker be at maximum two thirds as great as a mass of the tool guidance unit.

Abstract: Illustrative embodiments of torque-limited impact tools are disclosed. An impact tool may include a shaft adapted to rotate about an axis, a hammer having a hammer jaw with an obtuse impact surface, and an anvil having an anvil jaw with an acute impact surface. The shaft may include a first helical groove, and the hammer may include a second helical groove. The impact tool may further include a ball received in the first and second helical grooves, wherein the ball rotationally couples the hammer to the shaft and permits axial travel of the hammer relative to the shaft. The obtuse impact surface of the hammer jaw may be adapted to impact the acute impact surface of the anvil jaw when the shaft rotates in a first direction.

Abstract: An impact mechanism for an electric tool, comprising a transmission mechanism arranged in a housing and driven by a motor (2), whip blocks (7) and a power output member, the whip blocks (7) being driven by the transmission mechanism, and being connected to and driving an output shaft (8), wherein the transmission mechanism comprises a transmission wheel (4), the motor (2) is connected to and drives the transmission shaft (42) of the transmission wheel (4), two grooves (411) are symmetrically arranged on the peripheral wall of the transmission wheel (4), tail portions of the two whip blocks (7) are mounted in the two grooves (422) through wrist pins, respectively; head portions of the two whip blocks (7) are connected to the power output member; and, a first axial hole (421) and a second axial hole (422) are arranged at an interval on the transmission shaft (42) corresponding to the head portions and the tail portions of the whip blocks (7), a spring (5) is received in the first axial hole (421), two ends of t

Abstract: An impact body adapted for being mounted to a transmission module is provided. The transmission module includes a rotation portion formed with a receiving space and an axle disposed in the receiving space. The impact body is pivotally mounted to the rotation portion and received in the receiving space. A protrusion integrally extends outwardly from the other side of the impact body to allow the impact body swings around the protrusion. Whereby, the transmission module is easy to produce and assemble, has a lighter weight or greater rotary output power, and can improve transmission efficiency and lifetime, thus resulting in great inventive effects for use.

Abstract: According to a first aspect of the invention we provide an apparatus for reaction—free and reaction—assisted tightening and loosening of an industrial fastener including: a motor (102) to generate a turning force to turn the fastener; a turning force multiplication mechanism (210) for a lower speed/higher torque mode including a plurality of turning force multiplication transmitters (211, 212, 213); a turning force impaction mechanism (250) for a higher speed/lower torque mode including a plurality of turning force impaction transmitters (251, 252); a housing (220) operatively connected with at least one multiplication transmitter; a reaction mechanism (401) to transfer a reaction force generated on the housing during the lower speed/higher torque mode to a stationary object; wherein during the lower speed/higher torque mode at least two multiplication transmitters rotate relative to the other; and wherein during the higher speed/lower torque mode at least two multiplication transmitters are unitary to achiev

Abstract: An impact tool (1) includes a motor (3); a hammer (42) having a rotational axis extending in a first direction, the hammer (42) being rotatable in a rotational direction including a forward direction and a reverse direction opposite to the forward direction by the motor (3) and being movable in the first direction and a second direction opposite to the first direction; an anvil (52) disposed at the first direction side of the hammer (42) and strikable by the hammer (42) in the forward direction, the hammer (42) that has been struck the anvil (52) being moved in the second direction to come free from the anvil (52); and a fixing member (45A, 46A) that selectively allows the hammer (42) to move in the second direction or prevents the hammer (42) from moving in the second direction.

Abstract: An impact tool including: a motor; a housing that accommodates the motor; a hammer rotated by the motor in a rotating direction; an anvil struck by the hammer in the rotating direction; an end tool holding portion connected to the anvil and protruding from a front part of the housing; and a load receiving portion that receives a load of the hammer in a rear direction.

Abstract: An impact tool includes a motor, a hammer casing with an opened rear end and a disk-shaped member coupled to the hammer casing to close the opened rear end and to rotatably support a spindle. A first engagement member is formed on an outer face of the disk-shaped member. A second engagement member is formed on an inner face of the recess and engaging with the first engagement member to restrict a movement of the hammer casing in a second direction parallel to a rotation axis of the spindle. A third engagement member is formed on an outer face of the hammer casing. A fourth engagement member is formed on an inner face of the housing body and engaging with the third engagement member so as to restrict a movement of the hammer casing in the first direction.

Abstract: An impact device includes a housing, a motor supported by the housing, a stationary shaft, and a rotating transmission member supported on the stationary shaft for rotation. The rotating transmission member includes a hub having a first cam surface. The impact device also includes a rotating impact member carried by the transmission member and rotatable relative to the transmission member. The rotating impact member includes a lug protruding from an outer periphery of the rotating impact member and a second cam surface. The impact device further includes a spherical element engaged with the first and second cam surfaces on the hub of the rotating transmission member and the rotating impact member, respectively, an energy-absorbing member exerting a biasing force against the rotating impact member, and a reciprocating impact member oriented substantially normal to the stationary shaft and impacted by the lug of the rotating impact member.

Abstract: A pipe includes a base body (8) of metal, defining an outer surface (10) of the base body and an inner surface (12) of the base body, and an inner coating (14) which is applied to the inner surface (12) of the base body. The inner coating (14) includes a thermoplastic material or a polyamide. The pipe may be used in the transport of drinking water.

Abstract: An angle impact tool includes a handle assembly extending along a first axis, a prime mover in the handle, an output shaft rotatable about the first axis, and a work attachment connected to the handle assembly. An output drive is supported in the work attachment for rotation about an output axis perpendicular to the first axis. A gear assembly including a spur gear is positioned within the work attachment to transfer torque from the prime mover about the first axis to the output drive about the output axis. An impact mechanism is positioned within the work attachment and includes a hammer and an anvil. The hammer rotates under the influence of the prime mover and is operable to periodically deliver an impact load to the anvil. The output drive rotates about the output axis under the influence of the impact load being transmitted to the output drive by the anvil.

Abstract: A vibration hammer is provided, including a main body; a striking unit having a piston housing installed to be elevated by a hydraulic pressure controlling valve unit installed in the main body, a hammer guide slidably installed on the main body to be coaxial with the piston housing, and a piston having both ends fixed to the piston housing and a hammer guide and elastically deformable at a predetermined angle with an elevating direction of the piston housing; and a rotating unit installed in the main body and reciprocally rotating the hammer guide elevated together with the piston. The vibration hammer can prevent the piston from being damaged by being elastically deformed when a lateral pressure applied to the rod connected to the piston.

Abstract: A drive train for supplying power to a power tool may include, a motor, a motor shaft, a rotational coupling mechanism connected to the motor shaft, and a drive shaft connected to the rotational coupling mechanism that forms the shape of a “U.” A pair of enmeshed bevel gears transfers the motion from the motor shaft to an orthogonal tool bit. The drive train may also include a hammering device that transfers a rotational impacting motion to the tool bit. A hand power tool for driving a screw may include a tool shell with an integrally formed vertical handle, a rotational recess formed into the tool shell opposite the handle, and a tool chuck within the rotational recess that drives a screw. The tool may incorporate the drive train as described above. The tool may include a mechanism for locking the tool chuck in a particular position.

Abstract: In a hand-held power tool, in particular an impact drill driver, having a torque setting unit, a gearbox assemblage, a hammer impact mechanism, and a tool spindle, the hammer impact mechanism has a drive rotation element having a rotation axis that is disposed coaxially with at least a part of the tool spindle.

Abstract: An auto hammer having housing, a handle and a striking device, the striking device including a striking rod for striking nails or other components in a linear reciprocating manner and a clamping mechanism for clamping nails or other components. The clamping mechanism includes clamping elements and a sleeve and the sleeve is provided with slots along which the driving portions of the clamping elements may slide so that the clamping elements are movable between a closed position and an opened position. This clamping mechanism can reliably clamp nails or other components to facilitate the operation of the user.

Abstract: A transmission module includes a sleeve member, a cover disc, a hammering portion and an axle. The sleeve member has a rear disc and a cylinder body. A receiving space is defined between the rear disc and the cylinder body. The rear disc is formed with a teethed bore. The inner surface of the cylinder body is formed with at least one axially-stretched rib. The cover disc is disposed on the open end of the receiving space. The cover disc is formed with an axial bore. The hammering portion includes at least one rotary hammer, which is received in the receiving space. The rotary hammer has a through hole and a positioning groove. The rib is engaged with the positioning groove. The axle has a driven end and a working end. The driven end is inserted through the axial bore and mated with the through hole.

Abstract: A device and system for applying rotational impact to screws implanted in bony tissues. Specifically, embodiments of the present disclosure may provide medical professionals the ability to apply impact forces and torques to a threaded member in a rotational plane such that the surrounding tissues are not damaged from an axial impact or excessive rotational forces. The rotary impact driver may be used with thin and flexible shafts for percutaneous procedures.

Abstract: This pipe comprises: a base body (8) of metal, defining an outer surface (10) of the base body and an inner surface (12) of the base body, and an inner coating (14) which is applied to the inner surface (12) of the base body. The inner coating (14) comprises a thermoplastic material or a polyamide. Use in pipes for transporting drinking water.

Abstract: In a conventional impact generator, a great shock is generated when a weight collides with a rotary member, and a rotary shaft of the rotary member and a bearing supporting the rotary shaft receive the great shock. Therefore, it is necessary to employ a bearing having a great load capacity. Furthermore, great vibrations and noises are also generated in the impact generator. A rotary member (10) is rotatably supported by rotary shafts (11) and (12). A weight (30) is movably held by the rotary member (10). A shock absorber (40) for absorbing, by elastic force, a shock generated between the weight (30) and the rotary member (10) is provided between the weight (30) and the rotary member (10).

Abstract: A rotary impacting apparatus is provided which comprises a housing, a rotor rotatably accommodated in the housing, a driving source for rotating the rotor about a rotation axis, a main reciprocative implement reciprocatively held by the housing, and an impact member eccentrically held by the rotor. The impact member exerts an impacting force for pressing the main reciprocative implement when the main reciprocative implement is advanced relative to the rotation axis. The main reciprocative implement is provided with a diametrically smaller portion and a diametrically greater portion connected to the diametrically smaller portion.

Abstract: A power log splitter includes a base (28) and a wedge (12) and a ram (34) mounted on the base for receiving a log (31) lengthwise between them. A motor (16) turns a cam means (26) to deliver a series of short, quick blows onto one of the wedge (12) and ram (34), to generate strokes by which the wedge (12) splits the log (31). Preferably, there are more than two strokes per second; each stroke preferably has a duration of not more than about 0.05 second and the length of each stroke is preferably not more than 5 percent of the log length capacity L.sub.m, typically not more than 0.75 inch. The device includes a worm shaft (36) and transmission box (38) to urge together wedge (12) and ram (34) in a motion that is independent of the strokes produced by the rotating cam means (26).

Abstract: Two elements placing one into another and having different masses are connected with one another so that during one portion of their rotation they rotate jointly, and then when one of the elements reaches a break of its way the other element continues the same way rotation.

Abstract: A suspension device and a rapping mechanism for electrodes in a high voltage supplied electrostatic precipitator, wherein the suspension device has at least one horizontally arranged supporting element from which a number of electrodes are suspended, the supporting element being mounted inside a precipitator housing, and wherein the rapping mechanism is of the type which transmits a rapping influence to the uppermost ends of the electrodes. The electrodes are pivotably suspended, preferably eccentrically, and are stabilized in a substantially vertical position. The supporting element receives impact or vibrating influences supplied by an impact hammer or vibrator in the longitudinal direction of the element, while the electrodes are substantially free of play in this direction such the impact or vibrating influence on the element is imparted to the electrodes.

Abstract: A rotary impacting apparatus comprises a housing, a rotor rotated in the housing, an impact member eccentrically held by the rotor, and a main reciprocative implement held reciprocatively at a forward end portion of the housing. The rotor rotates to hit the impact member for driving the main reciprocative implement into the ground for instance. The apparatus further includes an auxiliary oscillating mechanism for transmitting an impacting force from the impact member to pull the main reciprocative implement when the housing is pulled relative to the main reciprocative implement by a predetermined distance.

Abstract: A rapping mechanism is provided for rapping a row of electrodes (1) in an electrostatic precipitator. The electrodes (1) consists of vertical strip plates suspended from their upper ends and the mechanism comprises a horizontal rapping bar (3) connected with the lower end of each electrode (1) in the row and a hammer (4) for striking the bar (3) in its axial direction. The connection between the lower end of each electrode (1) and the rapping bar (3) is an elastic connection (8) configured with a predetermined elasticity.

Abstract: A rotary impacting apparatus comprises rotary member drivingly rotated about a rotational axis within a casing. An impact member is loosely held by the rotary member so as to be movable toward and away from the rotational axis within a limited range. A holder mounted to the casing slidably supports a reciprocative member to allow movement thereof toward and away from the rotational axis within a limited range. The reciprocative member has a contact surface which interferes with the impact member rotating about the rotational axis when the reciprocative member is positioned closest to the rotational axis.

Abstract: A punch tool for applying force to a work piece includes a body, a grip mounted on one end of the body, a punch connected to the other end of the body, and an anvil pivotally connected to the body between the grip and the punch. A method for disengaging a fastener from an object in a limited work space includes inserting the punch of the tool into the work space in engagement with the fastener and striking the anvil with force sufficient to disengage the fastener. A method for punching a hole in an object at a point within a limited work space includes inserting the punch portion of the tool into the work space in engagement with the point and striking the anvil with force sufficient to punch a hole in the object.

Abstract: A backhoe assembly (10) comprises a boom (12) for pivotal attachment to a machine (11). A bucket (14) is pivotally supported by the boom (12) for rotation about a support axis (16). A hydraulic cylinder (34) having a piston rod (36) raises and lowers the boom (12) and rotates the bucket (14) about the support axis (16) between an open and closed position. The assembly (10) is characterized by a hammer (20) supported in a cantilevered fashion for pivotal movement about the support axis (16) by the bucket (14) between a cocked position on a cocked side of an over-center position and a released free-fall position on the other side of the over-center position.

Abstract: A tool for loosening fasteners, comprises an applicator bar formed with a socket for receiving the fastener to be loosened, a handle fixed to a housing rotatable about the applicator bar for loosening the fastener received in the socket, a hammer within the housing and connected thereto by a spring, and an anvil carried by the applicator bar. The tool further includes a rod coupling the anvil to the hammer in the initial position of the hammer and effective to prevent relative movement therebetween, and thereby to load the spring during the rotation of the operating handle in one direction, and a releasing device effective, after the operating handle has been rotated a predetermined distance, to release the coupling rod, whereby the loaded spring causes the hammer to impact against the anvil to thereby loosen the fastener received in the socket of the applicator bar.

Abstract: This invention describes an apparatus for breaking a hard surface such as a concrete road or bridge deck and essentially consists of a support for a torsional spring which is horizontally fixed to the support with a spaced rotational journal so that the torsional spring is mounted substantially horizontally. An oscillating member of desired mass characteristics is attached to the torsional spring with a force generating apparatus such as a hydraulic vibrator on one end of the oscillating member and a road crushing tool on the opposite end of the oscillating member. The oscillating member is attached rigidly to the torsional spring. Apparatus is also provided for positioning the impact or road crushing tool against the surface to be crushed and for maintaining the tool in that position during the crushing operation.The hydraulic vibrator, when it is operated, causes an axial oscillation in the torsional spring/mass system.

Abstract: Hand held tool for applying a rotational impact to a fastener. Means including a windable spring are mounted on the tool body for storing energy, which can be release and transmitted mechanically to other means engaging the fastener, to apply a rotational impact force to the fastener. The tool is useful for small fasteners and delicate workpieces, where the rotational impact should be applied with little or no axially-directed thrust force component.

Abstract: The invention relates to a turning mechanism for driving in or extracting piles by means of tangential rotary blows being imparted by a rocker arm equipped with balance weights and arranged in a rotary manner relative to the pile. In order to render superfluous the hitherto necessary noise-damping, additional damping means, damping members made from an incompressible, elastic material are used, which are placed in recesses in at least one stop of a pair of stops in such a way that there is a deformation, particularly at right angles to the impact direction, which is within the elastic limit of the member and prevents direct contact between the stop pairs. These members are arranged on all parts of the rocker arm which, in operation, form noise sources.

Abstract: Apparatus is provided for removing the interior tile lining from brick chimneys. The apparatus includes an assembly that is lowered into the chimney, the assembly comprising a reversible electric motor mounted within a frame, and a weighted impact member driven by the motor in a horizontal circular path. An impact-absorbing clutch protects the motor from mechanical shock, and keeps the weight of the impact member from pulling downwardly on the rotor of the motor.

Abstract: An impact wrench for using fastening or unfastening fasteners comprises a cylindrical rotor coupled to a motor shaft, said cylindrical rotor including a projection on its inner surface, the projection having a circumferential width and an axial length; an anvil coupled to said cylindrical rotor, the anvil including a hammer member capable of rocking therein, the hammer member being engageable with said projection; a springloaded pusher for urging said hammer member towards said projection, wherein a spring support slides either on a deep cam face or a shallow cam face both produced on said inner surface of the cylindrical rotor, thereby allowing said spring to become compressed or relaxed against said hammer member.

Abstract: An improved penetrating tool for pavement breakers is disclosed. The tool of the present invention has a flange with a striking surface which extends in the direction of motion of the vehicle. The striking surface is curved so that the closing angle, defined as the difference between the angle of motion and the angle of inclination of that portion of the striking surface in contact with the pavement, is constant throughout the entire stroke of the tool. The constant closing angle should be within the range of about 6.degree.-18.degree., preferably about 15.degree..

Abstract: An impact wrench includes a hammer, an anvil and a rotor driven by a motor, the hammer being swingeable in either direction with respect to the rotary axis of the rotor, the hammer resting on the anvil in a spring-loaded state so as to enable the hammer to line up with the axis of the anvil, the hammer including means for engaging itself with the inside surface of the rotor, whereby the hammer produces impacts at fixed intervals and transmits the same to the anvil.

Abstract: A device for preventing secondary impacts of a mass against a target member, as used in particular for generating shear waves in the earth, is provided. The mass is secured at the end of a pivotable rigid arm actuated by driving device, and the driving device adapted to block the fall of the rigid arms, comprises a cam co-operating with a pawl when it registers therewith and with a flat part of the cam with the registering conditions occurring only after the first impact of the mass and its bounce against the target member.

Abstract: PCT No. PCT/US79/01087 Sec. 371 Date Dec. 13, 1979 Sec. 102(e) Date Dec. 13, 1979 PCT Filed Dec. 13, 1979An impactor (10) having a fracturing portion (11) including a crank (12) and a force transferring structure (13). The force transferring structure (13) is hammered as a result of rotation of the crank (12) by a hammer (14) rotatably mounted to the crank for concurrent revolution about the crank axis (16) and rotation about a hammer axis (24). The hammer is rotated in synchronization with the crank to move a contacting portion (20) of the hammer reciprocatively toward and from the force transfer structure (13) with contact between the hammer and force transfer structure being free of rolling movement therebetween.

Abstract: An apparatus for converting centrifugal energy into percussive energy is operated by a motor continuously rotating a driven shaft whereby a rocking shaft is caused to oscillate about a pivot axis under the influence of the centrifugal force produced by a weight body during rotation of the driven shaft. The rocking shaft has a slot at its pivot axis and a bar extends through the slot and radially beyond opposite sides of the rocking shaft. Upon the rocking shaft oscillating in opposite directions, the opposite ends of the bar are deflected in opposite directions, so that one end of the bar urges a spring biased striker away from an anvil when the shaft rocks clockwise while the other end of the bar acts on the striker in a similar manner when the shaft rocks counter-clockwise.

Abstract: A relatively quiet-operating rotary hammer for use in apparatus for securing T-edging and similar edging bands. The hammer includes a pivoted hammer head that is intermittently and continuously impacted to provide a hammering action. The hammer is impacted by a rotary structure carrying spaced hammering elements for forcibly pivoting the hammer head.