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| Number | Title | Issue Date |
| 8181715 | Power tool A power tool according to the invention includes a dynamic vibration reducer having a body, a weight and elastic elements. The body is formed by a plurality of cylindrical members which are coaxially disposed to face each other. The elastic elements exert biasing fo... | 05/22/2012 |
| 8127862 | 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... | 03/06/2012 |
| 7987921 | Hammer A hammer comprising: a body; a tool holder mounted on the body for holding a cutting tool; a handle pivotally mounted on the body about an axis; a vibration dampener which connects between the handle and the body and which reduces the amount of angular vibrations tr... | 08/02/2011 |
| 7980323 | Shock dampening post driver A post driver having a dampening device adapted to isolate the hands and arms of the user from shock. ... | 07/19/2011 |
| 7942212 | Hand-guided power tool A hand-guided power tool has a drive motor and a tool in driving connection with the drive motor. At least one handle is provided for guiding the power tool in operation. At least one antivibration element functionally connects the at least one handle and the drive ... | 05/17/2011 |
| 7921934 | 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... | 04/12/2011 |
| 7866412 | Vibration attenuated power tool A vibration attenuated power drill. The drill includes a housing incorporating a motor for driving an output shaft. A drill bit is driven by the output shaft by means of cooperating ratchet plates contained in a gearbox. The motor has a stator and a rotor, and is pr... | 01/11/2011 |
| 7845427 | Sealing element of hand power tool housing A hand power tool has a housing comprising at least two housing parts, and at least one sealing and/or damping element introduced into the housing by injection molding. ... | 12/07/2010 |
| 7836971 | Power tool An elastic unit includes a transatory unit including a first elastic support member, a second elastic support member and not-shown four round bar-shaped elastic bodies made of rubber. A rotation urging unit is composed of a Neidhart spring including an outer frame, ... | 11/23/2010 |
| 7832498 | 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... | 11/16/2010 |
| 7712548 | Hand-held power tool with an oscillation damper A hand-held power tool includes a pneumatic percussing mechanism (3) located in the power tool housing (2) and having an anvil (5) and a percussion piston (4) for applying blows to the anvil (5), and at least one oscillation damper... | 05/11/2010 |
| 7712547 | Electric hammer An electric hammer comprising a hammer bit (313) performing hammering work on a work, a drive motor, a hammering piece (334) driven by the drive motor to apply a hammering force to the hammer bit, and a mechanism (371) for damping vibration gene... | 05/11/2010 |
| 7628222 | Breaker mounting bracket The present invention provides a breaker mounting bracket a breaker mounting bracket for mounting a breaker body on a distal end of an arm of a working machine or the like. The breaker mounting bracket includes left and right side plates which are arranged to face e... | 12/08/2009 |
| 7604071 | Power tool with vibration reducing means The invention provides a power tool which includes a tool bit, a first operating mechanism that linearly drives the tool bit and thereby causes the tool bit to perform a predetermined operation, and a dynamic vibration reducer 151 that reduces vibration in th... | 10/20/2009 |
| 7588097 | Power impact tool It is an object of the invention to provide a technique for further improving the vibration reducing performance in a power impact tool that linearly drives a tool bit by using a swinging mechanism. According to the invention, a representative power impact tool is p... | 09/15/2009 |
| 7571776 | Antivibration unit of a portable handheld work apparatus An antivibration unit of a portable handheld work apparatus includes a leg spring (3) having at least one wire turn (5) and at least one first wire leg (6). The wire turn (5) extends about a turn or coil axis (4) and is attached at... | 08/11/2009 |
| 7540336 | Vibration isolator for a pneumatic pole or backfill tamper A vibration isolation assembly is provided for use with a backfill tamper. In use, the vibration isolation assembly can be disposed between a handle and a percussion mechanism of the tamper and absorbs kickback forces from the percussion mechanism during backfill ta... | 06/02/2009 |
| 7472760 | Vibration reduction apparatus for power tool and power tool incorporating such apparatus A power hammer has a handle mounted to a housing and capable of limited movement relative thereto. A hollow axle is attached to the housing and is rotatable between a first and second position and is biased towards the first position by a torsional spring which exte... | 01/06/2009 |
| 7438140 | Shock attenuating device for a rotary impact tool A shock attenuating coupling device is provided for a rotary impact tool for drivingly connecting a hammer mechanism to a drive anvil. The shock attenuating coupling device includes a first coupling member, a second coupling member, a drum, a shoe, and a body of res... | 10/21/2008 |
| 7413030 | Pneumatic hammer drill having vibration damping end cap A pneumatic hammer drill includes a handle body, a pneumatic cylinder, a piston, a tool, and a damping member. The handle body has an upper part that defines a front cavity and that has a rear end. The pneumatic cylinder has a cylinder rear end fitted in the front c... | 08/19/2008 |
| 7404452 | Percussion power tool apparatus A percussion power tool apparatus includes a body relative to which an impacting tool is moved to effect an impacting operation, the apparatus further including an operating member by means of which an operating load is applied in an operating direction to the appar... | 07/29/2008 |
| 7401662 | Powered hand tool A powered hand tool comprising a pneumatic motor including a cylinder, a main body formed as a hollow tube member, a main body rear end being formed with a fluid inlet and a fluid outlet, the main body being axially disposed for engagement with the pneumatic motor, ... | 07/22/2008 |
| 7401661 | Lubricant pump for powered hammer A vibration reduction and lubricating mechanism for a powered hammer includes a power driven piston in a cylinder that reciprocatingly drives a ram, which repetitively strikes a beat piece, which repetitively strikes a tool received in a tool holder. The vibration r... | 07/22/2008 |
| 7383894 | Pneumatic hammer drill (I) A pneumatic hammer drill includes: a pneumatic cylinder having a cylinder rear end fitted in a handle body, an air passage, and a pressure chamber; and an air valve adjacent to the cylinder rear end. The air valve has a front bearing end, a valve orifice interconnec... | 06/10/2008 |
| 7363685 | Handle assembly for tool A handle assembly for a power tool 1 comprises a housing 2 defining a handle 4 and housing a motor for actuating an output member of the tool, such as a drill bit or jigsaw blade. The handle assembly comprises at least one flexible sheet 8 | 04/29/2008 |
| 7340985 | Method and device for vibration control A device and method for vibration control in a machine for cutting, said machine comprising a cutting tool supported by a tool holder. The device comprises a control unit and converting means which are connectible to the control unit and comprise a vibration sensor ... | 03/11/2008 |
| 7331407 | Vibration reduction apparatus for power tool and power tool incorporating such apparatus 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 ... | 02/19/2008 |
| 7322428 | Vibration reduction apparatus for power tool and power tool incorporating such apparatus A handle assembly for a power tool is described and includes a first substantially tubular body portion 210 which contains a first spring 212. A second body portion 216 is slidably mounted within first body portion 210 and contains a seco... | 01/29/2008 |
| 7320369 | Vibration reduction apparatus for power tool and power tool incorporating such apparatus A power tool has a handle assembly which is biased by a torsional spring. The torsional spring has an engaging arm the position of which is fixed relative to the housing by an adjusting mechanism. The adjusting mechanism has a lever which extends outside the housing... | 01/22/2008 |
| 7287601 | Power tool with a rotating and/or hammering drive mechanism A hand-operated power tool has a housing with a drive mechanism for driving a tool, a tool receptacle for receiving a tool, a handle assembly for grasping and handling located in a rear region which is remote from the tool receptacle and engaging the housing, wherei... | 10/30/2007 |
| 7266892 | Device for a portable tool such as a brush cutter This invention relates to a device for a portable tool, such as a brush cutter or the like, comprising a shaft tube (11) that via a shaft tube securing means is connected to a drive unit (10). The shaft tube securing means comprises a first sleeve shap... | 09/11/2007 |
| 7252156 | Vibration isolation handle It is an object of the invention to provide an effective technique for reducing the manufacturing costs of a handle mounted to a power tool. According to the invention, a representative handle may comprise a handle body, a grip, an elastic element and an elastic out... | 08/07/2007 |
| 7252157 | Power tool It is an object of the present invention to provide a power tool having a further improved vibration reducing performance. The representative power tool may comprise a tool bit, an actuating mechanism, a dynamic vibration reducer. The actuating mechanism drives the ... | 08/07/2007 |
| 7234379 | Device and a method for preventing or reducing vibrations in a cutting tool An arrangement for reducing vibrations in a tool holder (4) with a cutting tool (3) and has a vibration sensor on the tool holder (4) that is connected to a guide unit (11). The tool holder (4) has further two piezo-electric actuat... | 06/26/2007 |
| 7204322 | Power tool having pneumatic vibration dampening It is an object of the present invention to provide a vibration reducing technique caused by air pressure fluctuations within a power tool. According to the present invention, a representative power tool may comprise a driving motor, a driver and a tool bit. The dri... | 04/17/2007 |
| 7204744 | Hand-operated machine-tool comprising a vibration-damping rotary handle A handheld power tool, in particular a handheld right-angle grinder (10), has an electric motor drive for a motor housing (11) that accommodates a tool and also has a handle (15), which is retained on the motor housing (11) by means of a ... | 04/17/2007 |
| 7152853 | Manually operated implement A manually operated implement such as a chain saw, a parting-off grinder or similar device has an internal combustion engine to drive a tool and a handle arrangement to operate the implement. The handle arrangement is connected to the internal combustion engine via ... | 12/26/2006 |
| 7152695 | Power tool with air seal and vibration dampener A power tool is provided including a resilient boot having a radial flange mounted in a seat formed by housing halves in order to provide a sealed barrier segregating air of an inlet vent of a motor from air of an exhaust vent and the boot also mounting the motor an... | 12/26/2006 |
| 7143845 | Drilling apparatus with anti-vibration inertial body A blast-hole drilling rig includes a carriage, a mast disposed on the carriage, and a rotary head mounted on the mast for up-and-down movement. The rotary head includes: a housing forming an internal chamber, a hydraulically driven motor, and a rotation transmission... | 12/05/2006 |
| 7124840 | Engine breaker An engine breaker includes a vertically extending cylindrical main body (1), a work member (2) supported by a lower portion of the main body for up and down movement, an engine (5) mounted to an upper portion of the main body and having an outpu... | 10/24/2006 |
