| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 173093000 | With anvil arranged to transmit torsional impact to tool | 52 |
| 20090014193 | Impact Mechanism for an Impact Wrench - An impact mechanism ( | 01-15-2009 |
| 20090014194 | Electric power tool - A cover which covers outer peripheries of fastening screws are disposed on an outer periphery of a hammer case. A stopper which detachably positions and fixes the cover to the outer periphery of the hammer case is disposed. | 01-15-2009 |
| 20090242222 | Impact tool - In an impact tool including a spindle, an anvil, and an impact mechanism having a hammer and a coil spring, a restricting portion is provided at a front surface of a large-diameter portion of the spindle so as to receive a rear end of the coil spring and to restrict an inner diameter of the rear end of the coil spring. A ring-shaped groove is formed at a rear surface of the hammer to receive a front end of the coil spring, in a manner which provides an inner cylindrical portion at a rear side of the hammer. A run-off portion is formed in the restricting portion so as to allow the inner cylindrical portion of the hammer to move thereinto, so that the hammer can move backward for a distance corresponding to a depth of the run-off portion. | 10-01-2009 |
| 20100300716 | SWINGING WEIGHT ASSEMBLY FOR IMPACT TOOL - A swinging weight assembly for an impact tool includes an anvil having an impact jaw that is reinforced with a circumferential flange. A hammer includes a hammer lug and a cam lug for pivoting the hammer between an engaged position in which the hammer lug strikes the impact jaw and a disengaged position in which the hammer moves past the impact jaw. The cam lug is separated from the cam lug to define a space in which the reinforcing flange is received. | 12-02-2010 |
| 20110139474 | PNEUMATIC IMPACT TOOL - A pneumatic impact tool includes a handle, a work attachment coupled to the handle, an inlet and an outlet permitting air flow through the tool to drive the tool. A motor assembly is functionally positioned between the inlet and the outlet, the motor assembly having a rotor driven by the air flow, and the motor assembly defining a longitudinal motor axis about which the rotor rotates. An output drive is connected to the motor assembly to selectively rotate the output drive in response to rotation of the rotor. The output drive defines a longitudinal output axis about which the output drive rotates, such that the longitudinal output axis is substantially perpendicular to the longitudinal motor axis. An impact mechanism is functionally positioned between the motor assembly and the output drive, such that the impact mechanism drives the output drive with impact forces in response to rotation of the rotor. | 06-16-2011 |
| 20120292065 | Impact Tool - An impact tool includes a motor, a housing, a hummer, an anvil, a hummer case, and an end tool holding unit. The housing accommodates therein the motor. The hummer is rotatable by the motor. The hummer strikes against the anvil in a rotational direction of the hummer. The hummer case covers the hummer and the anvil. The end tool holding unit is connected to the anvil and protrudes from the hummer case in a first direction. The housing supports the hummer case at at least two locations. | 11-22-2012 |
| 20130008679 | Power Tool - An electronic pulse driver includes a motor, a hammer, an anvil, an end tool mounting unit, a power supply unit, and a control unit. The hammer is rotationally driven in forward and reverse directions by the motor. The anvil is rotated upon striking the hammer against the anvil as a result of a rotation of the hammer in the forward direction after rotation of the hammer in the reverse direction for obtaining a distance for acceleration in the forward direction. The power supply unit alternately supplies to the motor a forward electric power and a reverse electric power in a first cycle. The control unit controls the power supply unit to alternately supplies the forward electric power and the reverse electric power in a second cycle shorter than the first cycle when an electric current flowing to the motor increases to a prescribed value. | 01-10-2013 |
| 20130014967 | Power ToolAANM Ito; YutakaAACI Hitachinaka-shiAACO JPAAGP Ito; Yutaka Hitachinaka-shi JPAANM Oomori; KatsuhiroAACI Hitachinaka-shiAACO JPAAGP Oomori; Katsuhiro Hitachinaka-shi JPAANM Nakamura; MizuhoAACI Hitachinaka-shiAACO JPAAGP Nakamura; Mizuho Hitachinaka-shi JPAANM Nishikawa; TomomasaAACI Hitachinaka-shiAACO JPAAGP Nishikawa; Tomomasa Hitachinaka-shi JPAANM Mashiko; HironoriAACI Hitachinaka-shiAACO JPAAGP Mashiko; Hironori Hitachinaka-shi JP - An electronic pulse driver includes a motor, a hammer, an anvil, an end tool mounting unit, a power supply unit, and a control unit. The hammer is rotatable together with the anvil. The end tool mounting unit transmits the rotation of the anvil to an end tool. The power supply unit supplies a drive electric power to the motor. The control unit controls the power supply unit to halt a supply of the drive electric power to the motor when an electric current flowing to the motor increases to a prescribed value. The control unit controls the power supply unit to supply to the motor a prestart electric power lower than the drive electric power before supplying the drive electric power in order to permit the power supply unit to supply the drive electric power after the hammer is in contact with the anvil. | 01-17-2013 |
| 20130140053 | POST DRIVER WITH LIMITED MOVEMENT FLOATING POST ANVIL - The post driver with limited movement floating post anvil does not rely heavily upon the skill of the operator to efficiently drive posts. The post anvil is allowed to move up and down in relation to the driver, but its movement is limited by both lower and upper fixed barriers. Since the movement is limited, the operator can position the driver upon the post allowing the full weight of the driver framework/carrier machine to rest upon the post. The post would push the floating post anvil upward only to the point at which the upper fixed barrier prevents further upward movement of the floating post anvil. Thus, once the floating post anvil abuts the upper fixed barrier, substantially the entire weight of the post driver is resting on the post. | 06-06-2013 |
| 20140020921 | MECHANICAL IMPACT MECHANISM FOR A HANDHELD POWER TOOL - In a handheld power tool having a mechanical impact mechanism which has an impact member provided with at least one drive cam and an output shaft which is provided with at least one output cam and which is connected to a tool receptacle for accommodating a tool, the drive cam being designed for the percussive drive of the output cam during the impact operation of the mechanical impact mechanism, the impact member having the drive cams is mounted upstream from the output cams in an axial direction of the output shaft pointing away from the tool receptacle. | 01-23-2014 |
| 20140069674 | PERCUSSIVE HAMMER FOR PNEUMATIC OR ELECTRIC TOOLS - A striking mechanism of a pneumatic tool has a drive shaft with striking rod section, a hammering frame base sleeved on the exterior of the striking rod section, two swing hammers pivoted into the hammering frame base in a staggered state, and a reversing actuator for controlling the swing hammer's swinging direction. Two striking lugs are in integrally protruded on opposite sides of the striking rod section in a staggered state. Two reinforcing lugs are integrally protruded on opposite sides of the striking rod section and integrally connected with two striking lugs, respectively, in an axial extension state along the drive shaft. Slip guide edges are formed on two opposite sides of the protruded end of each reinforcing lug, allowing override slip of the reinforcing lug and corresponding arc-shaped hammer block on the swing hammer without generating striking action. | 03-13-2014 |
| 20140182869 | IMPACT TOOL - An impact driver or impact tool includes a motor, a motor housing that houses the motor, a grip housing integrally provided with the motor housing, a hammer case is disposed frontward of the motor housing, a spindle rotated by the motor, a hammer housed inside the hammer case and configured to be rotated by the spindle, and an anvil housed inside the hammer case which anvil is configured to be impacted by the hammer. In this impact driver, a length from a rear end of the motor housing to a front end of the anvil (i.e., the front-rear length of a main body) is less than 128 mm. | 07-03-2014 |
| 20140202725 | Power Tool with Spindle Lock - Illustrative embodiments of power tools with spindle locks are disclosed. In one illustrative embodiment, a power tool may include a drive train including an output assembly, the output assembly including a spindle configured to support a tool element, a power source configured to selectively supply energy to the drive train to cause the output assembly including the spindle to rotate, a switch movable between a first position in which the power source does not supply energy to the drive train and a second position in which the power source supplies energy to the drive train, and a spindle lock configured to automatically engage the output assembly including the spindle when the switch is in the first position and to automatically disengage the output assembly including the spindle when the switch is in the second position, the spindle lock preventing rotation of the output assembly including the spindle when engaged. | 07-24-2014 |
| 20140216775 | Angle Impact Tools - In at least one illustrative embodiment, an angle impact tool may comprise a handle assembly extending along a first axis and supporting a motor, the motor including a shaft configured to rotate about the first axis, and a work attachment coupled to the handle assembly. The work attachment may comprise an impact mechanism including an anvil configured to rotate about a second axis that is non-parallel to the first axis and a hammer configured to rotate about the second axis to periodically deliver an impact load to the anvil, a gear assembly configured to transfer rotation from the shaft of the motor to the hammer of the impact mechanism, and a housing supporting the impact mechanism and the gear assembly. The housing may be partitioned along a first parting plane that is perpendicular to the second axis such that the housing includes first and second housing sections. | 08-07-2014 |
| 20140216776 | Angle Impact Tool - 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. | 08-07-2014 |
| 20140262396 | Angle Impact Tool - Illustrative embodiments of angle impact tools are disclosed. In at least one illustrative embodiment, an angle impact tool may comprise a motor including an output shaft configured to rotate about a first axis, an impact mechanism configured to drive rotation of an output drive about a second axis that is non-parallel to the first axis, the impact mechanism comprising an anvil configured to rotate about the second axis and a hammer configured to rotate about the second axis to periodically deliver an impact load to the anvil, a gear assembly configured to be driven by the output shaft of the motor, the gear assembly including a drive gear configured to drive the hammer of the impact mechanism, and a conical spring positioned between the hammer and the drive gear, the conical spring biasing the hammer away from the drive gear. | 09-18-2014 |
| 20140262397 | Low-Profile Impact Tools - Illustrative embodiments of impact tools are disclosed. In at least one illustrative embodiment, an impact tool comprises a motor including an output shaft configured to rotate about a first axis and a drive train configured to be driven by the output shaft of the motor and to drive rotation of an output drive about a second axis that is non-parallel to the first axis, wherein the drive train includes an impact mechanism comprising a hammer configured to rotate about a third axis to periodically deliver an impact load to an anvil, the third axis being parallel to and spaced apart from the second axis. | 09-18-2014 |
| 20140338942 | Ball Deflecting Chamfer - A cam shaft is disclosed having an asymmetric chamfer for guiding a ball bearing deeper into a cam shaft groove to avoid ball loss when an immediate deceleration force is applied. The chamfer spaces the ball from an opening in the front face of a hammer that moves axially relative to the cam shaft when a tool having the cam shaft and hammer is dropped. The ball is therefore less likely to escape through the front opening of the hammer when the impact wrench is dropped. | 11-20-2014 |
| 20140338943 | Impact Wrench Anvil - An anvil is disclosed having wings with additional surface area compared to prior art impact wrench anvils. The wings engage respective hammers in a radial direction, and overlap with one another in an axial direction across the interface between the two hammers. The hammers can each include a recess so that one wing does not engage the hammer associated with the other wing. In an embodiment, the surface of the wing can be angled to increase the amount of material extending over the hammer interface. | 11-20-2014 |
| 20140367132 | IMPACT WRENCH - To improve the durability of a bearing mechanism such as a rolling bearing that is provided between a secondary hammer and a spindle in an impact wrench configured to firmly tighten screws by applying an impact in the rotational direction of an anvil, using a primary hammer and the secondary hammer, a technique is provided in which a rolling bearing is used as the bearing mechanism, the inner circumference of the secondary hammer is press-fitted to an outer ring of the rolling bearing, and a gap is created between the outer circumference of a spindle and an inner ring of the rolling bearing. The created gap can exhibit the effect of cushioning precession rotation of the secondary hammer to reduce the radial load that is applied to the rolling bearing, and, as a result, improve the durability of the rolling bearing and extend the life of the bearing. | 12-18-2014 |
| 20150034346 | Impact Tool - An impact tool comprises an end-bit holding section ( | 02-05-2015 |
| 20150075829 | Angle Impact Tool - 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. | 03-19-2015 |
| 20150343616 | HAMMERING SET FOR AN IMPACT TOOL - A hammering set has a rotating portion including a sidewall, two end walls connected to the sidewall, and at least one pivot portion in an accommodating space of the rotating portion. Two corresponding holes are disposed on the sidewall and communicating with the accommodating space. A shaft hole is disposed on one the end wall, a connecting portion is disposed on the other end wall for a rotating shaft. A hammering block has a through hole and a pivoting part on the pivoting portion and only swingable about the pivoting portion. A transmission shaft penetrates the shaft hole and the through hole, is rotatably disposed in the rotating portion, and is intermittently actuatable by each hammering block. A sealing assembly is provided on the rotating portion, at least seals the holes and is sealed between an inner wall of the shaft hole and the transmission shaft. | 12-03-2015 |
| 20150343617 | POWER TOOL AND ROTARY IMPACT TOOL - To provide a power tool and a rotary impact tool capable of suppressing transmission of vibration to a circuit board and so on from a drive portion connecting to a motor as a vibration generation source. An impact wrench includes a motor housing which houses a motor or a grip housing, a battery holding housing connecting to the motor housing or the grip housing through an elastic body and a control circuit board housed in the battery holding housing for controlling the motor. | 12-03-2015 |
| 20150343622 | IMPACT DEVICE FOR POWER TRANSMISSION - An impact device for power transmission includes an impact unit and a hydraulic pressure adjusting unit. The impact unit has a hydraulic cylinder which is installed with a piston assembly and an output shaft therein for outputting torque through the output shaft by utilizing a hydraulic pressure provided in the hydraulic cylinder. The hydraulic pressure adjusting unit is disposed in the hydraulic cylinder and operative to adjust the hydraulic pressure of the hydraulic cylinder. Therefore, the impact device for power transmission can generate a hydraulic torque pulse, and the magnitude of the output torque can be adjusted by the hydraulic pressure adjusting unit. | 12-03-2015 |
| 20160075004 | ROTARY IMPACT TOOL - A rotary impact tool includes a spindle that has a rotary axis. An anvil is arranged coaxially with the rotary axis in front of the spindle. A main hammer is directly or indirectly coupled to the spindle. The main hammer is rotatable about the rotary axis and movable in the axial direction, and the main hammer is configured to engage and strike the anvil to rotate the anvil. A sub-hammer accommodates at least a portion of the main hammer and at least a portion of the spindle. The sub-hammer rotates integrally with the main hammer. A brushless motor rotates the spindle. | 03-17-2016 |
| 20160129568 | IMPACT TOOL - An impact tool includes a hammer that is moved in an axis direction while being rotated by an action of a cam mechanism provided for a spindle and an anvil to which a rotational force and a striking force are applied by the hammer. A rear end surface of a striking part of the hammer is obliquely formed and has two mountain-shaped inclined surfaces. A striking part of the anvil is formed with two mountain-shaped inclined surfaces. By the inclined surfaces, even when the motor is stopped at a state where the hammer gets on the anvil, the hammer is moved forwards in the axis direction by an action of a spring and is then stopped. | 05-12-2016 |
| 20190143491 | IMPACT TOOL | 05-16-2019 |
| 173930500 | Rotary tool drive having torque responsive impact | 23 |
| 20080283259 | PNEUMATIC HAND TOOL - A compact pneumatic hand tool having a cylinder assembly received in a space of a body, wherein, the bottom inlet opening of the cylinder assembly is communicated with the air inlet in the space, meanwhile, the rear inlet passage of the cylinder assembly is corresponded to the control knob mounting portion of the body. Moreover, a control knob is extended through the control knob mounting portion of body as well as the rear inlet passage of the cylinder assembly, and a rotor of the cylinder assembly is coupled with a second coupling portion of a striking assembly. In addition, the front opening of the body is covered with the front cap and a sealing pad is provided between the body and the front cap, meanwhile the central axle is extended out of the front cap. With the existence of the sealing pad between the boy and the front cap, the cylinder assembly, the control knob and the striking assembly and are sealingly sealed between the front cap and the body, which enhances the airtight capability and the convenience of use. | 11-20-2008 |
| 20090056966 | IMPACT MECHANISM - “An impact mechanism comprises a drive motor engaging member and a tool bit retaining member rotatably inter-connected therewith. The tool bit retaining member has a main body portion, an anvil portion securely attached thereto for co-rotation therewith, and a tool bit retaining portion securely attached thereto for co-rotation with the main body portion. A hammer member is mounted on the drive engaging member for movement between an anvil contact position whereat force is transmitted from the hammer member to the anvil portion, and a release position whereat the hammer member is temporarily removed from the anvil portion. A spring biases the hammer member to the anvil contact position. In use, the hammer member to move from its anvil contact position towards its release position, whereat the hammer member is propelled by the spring and the rotation of the drive engaging member to impact on the anvil portion.” | 03-05-2009 |
| 20090065229 | Impact torque adjusting device of hydraulic torque wrench - The present invention, the objective of which is to provide an impact torque adjusting device of hydraulic torque wrench capable of maintaining high accuracy of the amount of impact torque generated by the impact torque generator of hydraulic torque wrench, shortening the impact torque generating period and improving durability of the impact torque generator of hydraulic torque wrench, is constructed by forming an operating fluid channel | 03-12-2009 |
| 20100044063 | Vibratory and Impact Connector for a Power Tool - A vibratory and impact connector for a power tool is provided with a spring, a first drive rod, a drive ring and a second drive rod which are sequentially received in an outer cylinder. The first drive rod is inserted through the spring and extended out of the outer cylinder, the second drive rod is inserted through the drive ring and into the first drive rod, and the drive ring is fixed to the outer cylinder. By such arrangements, driving the second drive rod can rotate the outer cylinder, the first drive rod and the drive ring. Furthermore, by restricting the rotation of the outer cylinder, the drive ring can also be restricted from rotation, and the drive ring and spring can cooperate with a spring to drive the first drive rod to perform axial reciprocation, thus creating an impact operation. | 02-25-2010 |
| 20100071924 | IMPACT WRENCH WITH A LUBRICATED IMPACT MECHANISM - An impact wrench comprises a housing, a rotation motor, an output shaft, and an impact mechanism including an inertia drive member with an impact chamber, a drive socket coupling the drive member to the motor, and anvil formed integral with an output shaft extends into the impact chamber, and a coupling means arranged to transfer kinetic energy from the drive member to the anvil, a lubricant provided in the impact chamber, and barrier forming cover element mounted on the drive member to seal off the impact chamber and prevent lubricant from being expelled from the impact chamber at rotation of the drive member. | 03-25-2010 |
| 20100276168 | POWER TOOL WITH IMPACT MECHANISM - A power tool with a housing, a motor, a transmission, a spindle and an impact mechanism. The motor has an output shaft that drives the transmission. The transmission has a plurality of planet gears, a planet carrier journally supporting the planet gears for rotation about an axis, and a ring gear that is in meshing engagement with the planet gears. The impact mechanism has a plurality of anvil lugs, an impactor and an impactor spring. The anvil lugs are coupled to the ring gear and are not engaged by the planet gears. The impactor is mounted to pivot about the spindle and has a plurality of hammer lugs. The impactor spring biases the impactor toward the ring gear to cause the hammer lugs to engage the anvil lugs. A power tool having an impact mechanism with an external adjusting member that can be moved to vary a trip torque of the impact mechanism is also provided. | 11-04-2010 |
| 20110030985 | IMPACT DRILL - An impact drill includes a housing having an accommodation chamber and a through hole extending from the accommodation chamber to the outside space, a driving mechanism mounted in the accommodation chamber and having a transmission shaft positioned in the through hole for providing an output torque and producing an impact force intermittently upon a resistance, the transmission shaft having a polygonal front segment extending out of the accommodation chamber, and a chuck unit, which has a drill chuck that has a connection barrel defining a polygonal coupling hole that is press-fitted onto the polygonal front segment of the transmission shaft and a first bearing mounted on the connection barrel and received in the through hole to secure the drill chuck to the housing. | 02-10-2011 |
| 20110048751 | DRIVE ASSEMBLY FOR A POWER TOOL - A drive assembly for an impact wrench includes a tool element for working on a workpiece. The drive assembly also includes a ram rotatable about a central axis. The ram includes a ram lug spaced from the central axis. The ram lug has at least one drive surface. The drive assembly further includes an anvil having an anvil lug with at least one driven surface engageable with the drive surface of the ram lug to drive the anvil. The anvil is connectable to the tool element to rotatably drive the tool element. At least one of the drive surface and the driven surface includes an involute profile. | 03-03-2011 |
| 20110056714 | ANVIL ASSEMBLY FOR A POWER TOOL - An anvil assembly for a tool includes an anvil having a body with an outer periphery and a head formed on a distal end of the body. The anvil assembly also includes a sleeve surrounding at least a portion of the outer periphery of the body. The sleeve has a distal end against which a tool element is abutted when the tool element is coupled to the head. | 03-10-2011 |
| 20110278034 | PORTABLE ANGLE IMPACT TOOL - A portable angle impact tool includes a housing, a motor, and a transmission mechanism. The transmission mechanism includes a transmission rod extending along an axis X, a spindle extending along an axis Y perpendicular to the axis X, an impact assembly for driving an output shaft and connected with the spindle, a first transmission element positioned on the transmission rod and engaging with a second transmission element positioned on the spindle, and a pinion positioned on of the transmission rod engaging with a gear on a motor shaft of the motor. In a direction of the axis Y, the impact assembly and the spindle are located on one side of the second transmission element and the longitudinal axis X of the transmission rod is located on the other side of the second transmission element to provide the impact tool with a more compact arrangement and higher output power from the output shaft. | 11-17-2011 |
| 20120000683 | IMPACT TOOL - To ensure that a hammer can retract by a sufficient amount without interfering with a washer receiving a rear end of a coil spring, there is disclosed an impact driver having a washer receiving a rear end of a coil spring biasing a hammer of an impact mechanism to an advanced position. The washer is annular with an inner diameter larger than an inner diameter of an annular groove disposed on a rear surface of the hammer, and includes a frontward extended portion disposed at an inner circumference of the washer. Between a carrier portion of the spindle and the washer, there is disposed a positioner that positions the washer coaxially with the spindle. | 01-05-2012 |
| 20120073845 | IMPACT WRENCH - An impact wrench is provided that can mitigate vibrations in the axial direction without reducing the rotary impact force of hammers. The hammers are composed of a primary hammer fitted to the outer circumference of a spindle and a cylindrical secondary hammer that is disposed so as to cover the primary hammer and that rotates integrally with the primary hammer. Furthermore, the secondary hammer is held by a center holding means in a state in which the rotational axis of the secondary hammer is coincident with the axis of the spindle in order to prevent run-out movement. With the use of the hammer configuration of the present invention, the mass of the primary hammer can be decreased compared to that of the secondary hammer, and therefore it is possible to mitigate vibrations in the axial direction while maintaining the rotary impact force. | 03-29-2012 |
| 20120132452 | HANDHELD POWER TOOL - A handheld power tool, including a tool socket on a drive shaft for purposes of holding a tool, the drive shaft executing a rotating and partially tangentially striking movement using a tangential striking mechanism drivable by a drive. The tangential striking mechanism has an anvil associated with the drive shaft and a hammer associated with the drive, movable with respect to each other so as to strike each other axially when under the effect of the force of at least one first spring, and to strike each other tangentially when the anvil and the hammer are rotated. The hammer has a main mass, and an extra mass that is under the effect of a second spring couplable to the main mass. | 05-31-2012 |
| 20120234566 | IMPACT TOOL - An impact tool including: a motor including, a rotor, a stator, and a detecting device that detects a rotation position of the rotor; a hammer driven by the motor so as to be rotated; an anvil configured to rotate relatively to the hammer and is struck by the hammer; and an output shaft connected to the anvil; wherein the anvil is struck by the hammer by rotating the hammer in a forward rotation direction by a second predetermined amount after rotating the hammer in a reverse rotation direction by a first predetermined amount, and wherein the first predetermined amount and the second predetermined amount are controlled based on a rotation angle that is obtained based on an output of the detecting device. | 09-20-2012 |
| 20120285713 | HAMMER CAGE FOR AN IMPACT TOOL - A hammer cage, adapted for use in an impact tool that has a pin and a hammer swingable on the pin, includes: first and second walls, and first and second connecting walls independently interconnecting the first and second walls and cooperating with the first and second walls to define an impact space for receiving the hammer; and a first restricting structure having a pin hole member that extends through the first wall and that is adapted for extension of the pin, and a first restricting protrusion that protrudes from the second connecting wall toward the first connecting wall and that is adapted for restricting swing motion of the hammer on the first pin in the impact space. | 11-15-2012 |
| 20140124228 | ELECTRIC POWER TOOL - An electric torque delivering impulse tool includes a housing with a front end and a back end, an electric torque delivering motor with a rotor that is arranged to rotate with respect to a stator, an output shaft arranged at the front end of the housing, and a pulse unit intermittently coupling the motor to the output shaft, wherein the pulse unit includes an inertia drive member that is connected to the rotor. The rotor and the inertia drive member are rigidly assembled to each other without play so as to form one integrated rotatable structure which is mounted as one single unit inside the housing. | 05-08-2014 |
| 20140124229 | IMPACT TOOL - An impact tool has a hammer ( | 05-08-2014 |
| 20160193725 | DRILL | 07-07-2016 |
| 20160193726 | DRILL | 07-07-2016 |
| 173930600 | Hammer head reciprocates along rotary axis | 4 |
| 20090255699 | DISCONTINUOUS DRIVE POWER TOOL SPINDLE AND SOCKET INTERFACE - A discontinuous drive power tool assembly for generating rotational torque. The tool assembly includes a spindle having a first end portion configured to receive a socket. The first end portion has a primary engaging surface and a tapered surface spaced from a distal end of the first end portion. The primary engaging surface and the tapered surface are configured to engage corresponding surfaces on the socket. The tool assembly also includes a pulse hammer engagable with a second end portion of the spindle that is opposite the first end portion, and a motor including a motor shaft engagable with the pulse hammer, the motor being configured to rotate the pulse hammer. | 10-15-2009 |
| 20120318548 | IMPACT TOOL - In an impact tool, a hammer is divided into an inner-side main hammer engageable with or disengageable from an anvil and an outer-side sub hammer having a peripheral wall covering an outer periphery of the main hammer and formed as a separate member. The sub hammer is rotatably disposed in a rearward position, and the peripheral wall is engageable with the main hammer so that the main hammer and the sub hammer are unitarily rotatable. A connecting member is disposed between the main hammer and the peripheral wall in such a manner as to be movable between a connecting position and a disconnected position using a switching device. When the connecting member is moved in the connecting position, a drill mode is selected, in which retraction of the main hammer is restricted. | 12-20-2012 |
| 20150114674 | IMPACT DEVICE OF PNEUMATIC TOOL - An impact device includes a transmission shaft, an impact cylinder, two first impact pins and a first ring. The transmission shaft has an impacted section disposed in the impact cylinder, an extending section extending along an axis, a first protrusion extending toward a first radial direction, and two first concave surfaces located at the first protrusion. The impact cylinder has two elongated protrusions and two first radial holes separated by the elongated protrusions. The first impact pins are received in the first radial holes in parallel to the axis and abuttable against the first concave surfaces. The first ring is sleeved onto the impact cylinder and the first impact pins and has a first narrow groove in which one elongated protrusion is located, and a first wide groove in which the other elongated protrusion is movably located. The impact device has sufficient torque output and long lifetime. | 04-30-2015 |
| 20160176027 | ROTARY TOOL | 06-23-2016 |
| 173930700 | Torque transmitted from hammer head traveling axially only | 1 |
| 20150041169 | IMPACT TOOL - An impact driver includes a motor, a spindle rotated by the motor, a hammer that is movable forward and rearward with respect to the spindle and that has an inner peripheral portion facing the spindle, and an anvil struck in a rotational direction by the hammer. A grease supply path is provided to supply grease to the inner peripheral portion of the hammer. | 02-12-2015 |
