| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 173210000 | With impact cushioning means | 42 |
| 20080196915 | Vehicle control system - A vibration reduction apparatus for use with a hammer tool having a hammer piston is disclosed. The hammer piston is caused to reciprocate in the cylinder by rotation of a gear wheel and crank drive. A cam is mounted around the gear wheel, a counterweight surrounds the piston cylinder, and a cam follower is provided on the counterweight. The cam follower on the counterweight is urged into contact with the cam by a biasing element. The external profile of the cam is such that rotation of the gear wheel causes oscillation of the counterweight in antiphase to motion of the hammer piston to counteract vibrations produced by operation of the hammer action of the tool. A mechanism is provided to deactivate the vibration reduction apparatus when the hammer action of the tool is deactivated. | 08-21-2008 |
| 20080308286 | HYBRID IMPACT TOOL - 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. | 12-18-2008 |
| 20090000801 | Process for Determining Usage Data for a Portable Hand-Activated Apparatus and the Device for Implementing the Process - According to the process, which relates to a manually-activated portable device with indirect firing by a drive piston which comprises among other things a means of propelling the piston and a means of damping the piston, usage data from the device is used and the device is adapted to this data. The device comprises a means for detecting the impact of piston against the means of damping. | 01-01-2009 |
| 20090095499 | ELECTRICAL POWER TOOL - An electrical power tool ( | 04-16-2009 |
| 20090188692 | MOUNTING ASSEMBLY FOR HANDLE FOR POWER TOOL - A mounting assembly for moveably mounting a handle of a power tool to a housing of the power tool is disclosed. The mounting assembly has a metal bar ( | 07-30-2009 |
| 20090236113 | POWERED HAMMER WITH A VIBRATION DAMPENING MECHANISM - A powered hammer is described comprising a housing, a tool holder mounted on the housing, a percussion mechanism arranged within the housing which mechanism includes a ram reciprocating in a longitudinal direction and being adapted to apply impacts on a tool bit supported in the tool holder, a dampening mass which is slidably mounted in the longitudinal direction within the housing, wherein the dampening mass is biased towards a neutral position by a biasing element and wherein the dampening mass may be deflected from the neutral position against the biasing force of the biasing element. The dampening mass is formed of a ferromagnetic or paramagnetic material or comprises a permanent magnet and a solenoid is arranged within housing adjacent to the dampening mass such that the solenoid applies a force in the longitudinal direction on the dampening mass when being in the neutral position if a current is flowing through the solenoid. | 09-24-2009 |
| 20100018735 | Power tool - A power tool capable of performing vibration damping action in working operation, without an increase in size. The working tool includes a motor, a housing in which an internal mechanism driven by the motor is stored, a tool bit disposed on one end of the housing, a hand grip continuously connected to the other end of the housing, and a dynamic damper. The dynamic damper is disposed by utilizing a space between the housing and the internal mechanism so that the damping direction of the dynamic damper faces the longitudinal direction of the tool bit. | 01-28-2010 |
| 20100116520 | INTERNALLY DAMPENED PERCUSSION ROCK DRILL - A percussion drill, and methods of using the same, including a shank in mechanical alignment with a piston-hammer and a valve in fluid communication with the piston-hammer. The percussion drill further includes an internal hydraulic dampening system for reducing the velocity of the piston-hammer when the shank is forward of a power position relative to the velocity of the piston-hammer when the shank is in a power position. Preferably, the internal hydraulic dampening system includes mechanical alignment of a portion of the piston-hammer with a port in fluid communication with the valve, operable to reduce fluid flow into an area surrounding the valve when the piston-hammer is forward of its position relative to its normal operation. | 05-13-2010 |
| 20100155097 | CELLULAR FOAM BUMPER FOR NAILER - A device for impacting a fastener in one embodiment includes a drive channel, a cylinder opening at an end portion to the drive channel, a microcellular polyurethane elastomer (MPE) bumper fixedly positioned at the end portion of the cylinder, the MPE bumper including a drive bore extending therethrough and aligned with the drive channel, and an outer wall defining a plurality of grooves extending radially about the MPE bumper, and a drive mechanism including a drive blade aligned with the drive bore. | 06-24-2010 |
| 20100294525 | HAND TOOL MACHINE - The invention relates to a hand tool machine, particularly a drill and/or chisel hammer, having a striking unit comprising at least one hammer and one striking element, and having a damping device for the striking element for damping a B-strike of the striking element against a striking unit. The invention proposes that the damping device have at least one axial overlap region with the hammer in at least one operating mode. | 11-25-2010 |
| 20120145426 | LOWER DAMPER FOR DEMOLITION HAMMER - A demolition hammer is provided that may include a housing having a distal end, a power cell disposed in the housing, an end plate attached to the distal end of the housing, and a damper disposed in the housing between the power cell and the end plate, wherein the damper is spaced apart from the power cell by a gap. The damper may also support and align a plurality of wear plates interposed between the housing and power cell. The damper may have generally rectangular first portion having a planar upper surface and a planar lower surface generally parallel to the upper surface and a generally circular second portion extending from the lower surface, wherein the first portion and the section portion define a central through bore. | 06-14-2012 |
| 20130037293 | DRILLING MACHINE - The present invention relates to a drill comprising a shank adapter ( | 02-14-2013 |
| 20130133913 | Force-Barrier - The Force-Barrier is a very fast force applier and remover on or from a reciprocating body. The Force-Barrier is a completely passive device. It needs no control, and switches the force always at the same location regardless the orientation and gravity. In case the reciprocating body is driven by pressurized liquid or compressed gas, the Force-barrier is a substitute to a directional valve, or on-off valve, but faster, consuming less energy, and not being in need of control. The Force-Barrier enables the use of at least one spring and/or at least one electro motor in rebound-effectors and other reciprocating devices. The Force-Barrier may be implemented as a disk placed in between a cylinder and a piston, wherein the cylinder has two internal diameters, and the piston has two external diameters, and wherein there is a step between the two diameters of the piston and the two diameters of the cylinder. | 05-30-2013 |
| 20130264086 | HAND-HELD POWER TOOL - A hand-held power tool ( | 10-10-2013 |
| 20160151905 | IMPACT TOOL | 06-02-2016 |
| 173211000 | Mechanical spring | 22 |
| 20080210451 | Impact power tool - It is an object of the invention to provide a technique for a reduction of an impact force cased by rebound of a tool bit after its striking movement in an impact power tool. The representative impact power tool includes a tool body, a hammer actuating member, a striker, a weight and an elastic element. A reaction force is transmitted from the hammer actuating member to the weight and the elastic element is elastically deformed when the weight moves ward by the reaction to absorb the reaction force. The invention is characterized in that the mass of the weight is set to about 40% or more of the mass of the stiker. | 09-04-2008 |
| 20080283264 | Impact tool - It is an object of the invention to provide a technique that contributes to rationalization of a mechanism relating to reduction of vibration in an impact tool. Representative impact tool includes a tool body, a hammer actuating member, a dynamic vibration reducer and a positioning elastic element. The positioning elastic element contacts the hammer actuating member and thereby positions the tool body with respect to the workpiece so as to absorb a reaction force caused by rebound from the workpiece and acts on the hammer actuating member when the hammer actuating member performs the hammering operation on the workpiece. The positioning elastic element includes the elastic element formed as a component part of the dynamic vibration reducer. | 11-20-2008 |
| 20080283265 | Impact tool - It is an object of the invention to provide an effective technique for further enhancing the effect of reducing a reaction force inputted during hammering operation. Representative impact tool comprises a tool body, a hammer actuating member, a cylinder and a compression coil spring. The compression coil spring contacts the hammer actuating member and thereby positions the tool body with respect to the workpiece when the hammer actuating member is pressed against the workpiece and pushed rearward in advance of the hammering operation. In such position, the compression coil spring absorbs a reaction force that is caused by rebound from the workpiece and acts upon the hammer actuating member when the hammer actuating member performs the hammering operation on the workpiece. The cylinder is inserted into the tool body from the front along the axial direction of the hammer actuating member and thereby housed within a predetermined housing part of the tool body. The compression coil spring applies a biasing force to the cylinder in a rearward direction and thereby holds the cylinder in the housing part. | 11-20-2008 |
| 20080308287 | Impact tool - It is an object of the invention to provide a technique for further improving the vibration reducing performance in an impact tool. A representative impact tool includes a tool body, a cylinder housed within the tool body, a dynamic vibration reducer having a weight that linearly moves under a biasing force of an elastic element, wherein the dynamic vibration reducer reduces vibration of the tool body during hammering operation by the movement of the weight in the axial direction of the tool bit, and a mechanical vibration mechanism that actively drives the weight by applying external force other than vibration of the tool body to the weight via the elastic element. The weight and the elastic element are disposed on the axis of the tool bit and between an inner wall surface of the tool body and an outer wall surface of the cylinder in such a manner as to cover at least part of the outer wall surface of the cylinder in the circumferential direction. | 12-18-2008 |
| 20090065231 | RECIPROCATING PNEUMATIC TOOL MECHANISM - The present invention provides a reciprocating pneumatic tool mechanism, including a casing, pneumatically-operated control module, control switch, actuating module and vibration-absorbing member. The plates of the actuating module are combined into a single body by the perforating locator. The periphery of the plates can be slidably abutted with the inner wall of the tank. The air inlet of actuating module is adapted air-tightly with air supply end of pneumatically-operated control module. At a front end of the actuating module, a protruding tube is screwed into a punch hole in front of the casing. The vibration-absorbing member includes a built-in buffer between actuating module and pneumatically-operated control module, and a front-mounted buffer between the front ends of actuating module and casing. With the invention, the vibration-absorbing members of reciprocating pneumatic tool is saved, improving the assembly efficiency, reducing assembly cost and volume with better economic efficiency. | 03-12-2009 |
| 20090120658 | HAND-HELD POWER TOOL - A portable power tool, particularly a hammer drill and/or chipping hammer, comprising a main element ( | 05-14-2009 |
| 20090218114 | Hand-held power tool with vibration compensator - A hand-held power tool ( | 09-03-2009 |
| 20090223693 | POWER TOOL - A power tool capable of performing vibration damping action in working operation, without an increase in size. The working tool includes a motor, a housing in which an internal mechanism driven by the motor is stored, a tool bit disposed on one end of the housing, a hand grip continuously connected to the other end of the housing, and a dynamic damper. The dynamic damper is disposed by utilizing a space between the housing and the internal mechanism so that the damping direction of the dynamic damper faces the longitudinal direction of the tool bit. | 09-10-2009 |
| 20100000752 | Resilient Stop Assembly For Impact Tool - A resilient stop assembly for an impact tool includes first and second resiliently deformable parts, and a substantially rigid part situated between the deformable parts. Each of the first and second resiliently deformable parts and the substantially rigid part comprises: first and second opposite impact surfaces, at least one peripheral surface joining the impact surfaces, and an aperture extending entirely through the part between exit openings in the impact surfaces. The first impact surface of the second resiliently deformable part is separated from the second impact surface of the first resiliently deformable part by contact of those first and second impact surfaces with the substantially rigid part. | 01-07-2010 |
| 20100126746 | BREAKING MACHINE SHOCK ABSORBING SYSTEM - A breaking apparatus ( | 05-27-2010 |
| 20100243286 | POWER TOOL AND CUSHIONING MECHANISM THEREOF - A power tool includes a striking cylinder, a striking piston slidably housed in the striking cylinder, a driver coupled to a bottom surface of the striking piston, and a cushioning mechanism configured to absorb an impact of striking a fastener with the driver when the striking piston is driven. The cushioning mechanism includes a housing formed below the striking cylinder, and a bumper housed in the housing to receive the bottom surface of the striking piston. The bumper is formed in a tubular shape, a wall thickness of a central section of the bumper is greater than wall thicknesses of an upper section and a lower section of the bumper, and the wall thicknesses of the upper section and the lower section are substantially the same. | 09-30-2010 |
| 20110083870 | Combination of Impact Tool And Shaped Relatively Lower Modulus Material - An impacting tool, such as a jackhammer or electric hammer is proposed to be modified by a high modulus polymeric material, or metal of lower relative modulus than surrounding metal such as that of a piston. An interchangeable tool head is proposed to have inserted in a cavity in the impacted end such a high modulus polymeric material. Thus the term relatively lower modulus inclusion (“RLMI”) has been selected for the descriptive term. By using such relatively lower modulus material for an inclusion, which inclusion can be an insert, and modification of the piston or ram or impacting end of the tool, and additionally, if desired, the stop end of the piston or ram, the invention enables reduction of noise and vibration without substantially diminishing impact effectiveness and working time. Additionally, the working end of a cutting or impacting tool can be modified to a sharper angle because of diminished force through such relatively lower modulus inclusion. The edge angle, of for instance a chisel, may be modified to take advantage of mechanical changes resulting from the relatively lower modulus inclusion. | 04-14-2011 |
| 20120024555 | IMPACT TOOL - Representative impact tool according to the invention includes a reaction force transmitting member | 02-02-2012 |
| 20120125650 | Hand-Held Machine Tool - A hand-held machine tool is provided. The hand-held machine tool includes a striking element that is accelerated along a working axis, and a guide for the striking element. A cushioning damper limits a motion of the striking element along the working axis and has an elastic damping ring. The damping ring has grooves running on at least one face side radial to the working axis. | 05-24-2012 |
| 20120247798 | BREAKING MACHINE SHOCK ABSORBING APPARATUS - A breaking apparatus ( | 10-04-2012 |
| 20130199814 | handheld machine tool having a mechanical striking mechanism - In the case of a handheld machine tool having a mechanical striking mechanism, which includes a striking body provided with at least one actuating cam and an output shaft provided with at least one output cam, the actuating cam being configured for percussively driving the output cam during percussive operation of the mechanical striking mechanism, a damping element, which has an abutment element acted upon by a spring element, is provided at least on one actuating cam and/or on one output cam. | 08-08-2013 |
| 20130220658 | HANDHELD POWER TOOL - A handheld power tool is disclosed. The tool has a housing, a hammer mechanism and a torque coupling. The hammer mechanism includes a beater which is movably guided along the working axis in the guide tube. The guide tube is mounted in a suspension attached to the housing so that it is movable along the working axis. The torque coupling is mounted on the guide tube and is supported on the suspension in the impact direction. The guide tube is supported on the torque coupling in the impact direction. The guide tube may be shifted with respect to the housing in the impact direction such that the torque coupling is shifted relative to the housing through the guide tube in a positively guided manner. | 08-29-2013 |
| 20140332246 | DAMPER SYSTEM FOR A POWER CELL OF A HYDRAULIC HAMMER - A damper system for a power cell includes a single-piece top damper element disposed on the power cell, a pair of middle damper elements disposed about a mid-portion of the power cell, and a single-piece bottom damper element that is formed from a material having Shore hardness in the range of about 90 A to 95 A. The middle damper elements are mutually identical in construction, and include interlocking features that are configured to allow a releasable engagement therebetween. The bottom damper element defines a central opening therein, and includes a base plate disposed about the central opening. The bottom damper element further includes appendages extending axially from a top side of the base plate, and a lateral projection extending radially inward from each of the appendages. The lateral projection is configured to abut a top side of a keel member defined at a bottom portion of the power cell. | 11-13-2014 |
| 20150034351 | PERCUSSION DEVICE - A percussion device including a shank adaptor, a machine housing that contains a percussion piston that is arranged to carry out a reciprocating movement caused by the pressure from a hydraulic fluid and to strike the shank adaptor when the percussion device is in use. An elastic element is arranged radially outwards from the percussion piston to dampen the recoil from the shank adaptor. The machine housing has an inner surface that faces the percussion piston. The elastic element has an inner surface that faces the percussion piston and an outer surface that faces the inner surface of the machine housing. At least a part of the outer surface of the elastic element directly faces the inner surface of the machine housing. | 02-05-2015 |
| 20150367492 | IMPACT MACHINE - The invention relates to an impact machine ( | 12-24-2015 |
| 20160001433 | STRIKING TOOL - A technique for making a handle vibration-proof while avoiding size increase is provided in an impact tool. The impact tool has a striking mechanism part for driving a tool bit in its axial direction, a motor for driving the striking mechanism part, a tool body housing the motor and striking mechanism part, an outer shell housing covering part of the tool body, a handle that is integrally formed with the outer shell housing and extends transversely to the axial direction, a first handle end portion formed on one extending end of the handle, a second handle end portion formed on the other extending end of the handle, a first elastic element that connects the first handle end portion and tool body for relative movement in the axial direction, and a second elastic element that connects the second handle end portion and tool body for relative movement in the axial direction. | 01-07-2016 |
| 20160136798 | BREAKING MACHINE SHOCK ABSORBING APPARATUS - A breaking apparatus ( | 05-19-2016 |
| 173212000 | Fluid spring | 5 |
| 20090283285 | Pneumatic impact tool - A ground piercing tool as according to the invention has a front head assembly mounted on a bit shaft. A mid-portion of the bit shaft is mounted between front and rear chambers. Compressed fluid is supplied to the front chamber to form a gas spring that prevents the bit shaft from impacting against a front stop when it receives a blow from the striker. A valve is provided that includes a passage that permits communication between the front chamber and the rear chamber when the bit shaft is in a forwardmost position wherein it contacts the front stop. The valve permits compressed air to pass from the front chamber to the rear chamber, negating the gas spring when the bit shaft is in the forwardmost position. | 11-19-2009 |
| 20100258326 | Method and device - The present invention relates to a method for controlling a rock drilling process, in which an impulse-generating device comprising an impact element transmits a shock wave to a tool connected to the impulse-generating device, whereby a portion of the energy of the shock wave is transmitted to the rock by means of the tool and a portion of the energy of the shock wave is reflected and brought back to the impulse-generating device as reflected energy. The method comprises steps of generating at least one parameter value representing the reflected energy, and regulating the interaction of said impact element with said tool at least partially based on said value or values to control the rise time and/or length of said shock wave. The invention also relates to a regulation device, an impulse-generating device and a drilling rig. | 10-14-2010 |
| 20110315418 | Recoilless Hammer - A recoilless hammer comprising a moil supported for reciprocal movement along a hammer axis of a housing, a piston moveable within the chamber of an elongate tube extending from the rear of the housing such that it may strike the moil. In a rest position the piston is held forward against the moil by a low pressure air supply delivered from the aft end of the chamber, and the piston is retracted to a charged position at the aft end of the chamber by delivery of high pressure air to act on the fore portion of the piston. Upon actuation of a trigger mechanism, air is vented from the fore end of the chamber to atmosphere causing a pressure unbalance of low magnitude across the piston, such that it accelerates towards and strikes the moil. The chamber is of a length to enable a high energy blow with minimal piston acceleration recoil when the hammer is manually held and operated. | 12-29-2011 |
| 20130277080 | HAND-HELD POWER TOOL - A hand-held power tool has a pneumatic striking mechanism ( | 10-24-2013 |
| 20130333911 | POWER TOOL WITH MAGNETO-PNEUMATIC STRIKING MECHANISM - A power tool | 12-19-2013 |
