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| Number | Title | Issue Date |
| 8176997 | Hand-held power tool with a chuck for receiving a percussion working tool A hand-held power tool includes a work spindle (4)in which a chuck (3) for receiving an axially displaceable, within limits, percussion working tool (2), is mounted on. The work spindle (4) having a coaxial die (5) located in its i... | 05/15/2012 |
| 7967078 | Impact tool It is an object of the invention to provide a rational forced vibration of a dynamic vibration reducer in an impact tool that linearly drives a tool bit in an axial direction of the tool bit via a swinging member. An impact tool includes a motor 111, a... | 06/28/2011 |
| 7926586 | Hand-held power tool with a pneumatic percussion mechanism A hand-held power tool includes a pneumatic percussion mechanism having a percussion piston reciprocating along a percussion axis and having a bore extending at an angle to the percussion axis, and an air spring for displacing the percussion piston. ... | 04/19/2011 |
| 7861799 | Impact tool It is an object of the invention to provide a technique which is effective in improving the durability of an angular positioning device of a tool bit and in reducing weight of a tool body in an impact tool. A representative impact tool includes a tool body, a lubric... | 01/04/2011 |
| 7784562 | 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 compre... | 08/31/2010 |
| 7726414 | Hollow piston hammer device with air equilibration and idle openings An air spring hammer device that includes a drive piston, moving axially back and forth, with a front face of hollow embodiment and a hammer piston moving in said hollow. A ventilation slot is embodied in a guide wall of the drive piston. The drive piston may be gui... | 06/01/2010 |
| 7721819 | Rotary hammer A rotary hammer includes a housing, a tool holder mounted on a front portion of the housing, and a motor mounted in the housing. The motor includes an armature shaft arranged substantially perpendicular to an axis of rotation of the tool holder and including toothin... | 05/25/2010 |
| 7562721 | 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 ... | 07/21/2009 |
| 7533736 | 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 ... | 05/19/2009 |
| 7445056 | 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 ... | 11/04/2008 |
| 7422075 | Rotary tool An overload clutch assembly for a power tool having two torque settings through which rotary drive is transmitted to a spindle. The overload clutch assembly is capable of being between switched between the two torque settings by at least one actuator. The clutch ass... | 09/09/2008 |
| 7413026 | Lubricant system for powered hammer A powered hammer includes a housing, a tool holder coupled to the housing and configured to hold a tool, a motor within the housing, a cylinder disposed within the housing, and a piston slideably mounted within the cylinder. A drive mechanism converts rotary output ... | 08/19/2008 |
| 7410009 | Power tool It is an object of the present invention to provide an improved technique for preventing leakage of lubricant from an accommodating space that houses a driving mechanism, while regulating the internal pressure of the accommodating space in a power tool. A representa... | 08/12/2008 |
| 7404451 | Wobble device for a hand-held power tool and a hand-held power tool with the wobble device A wobble device (20) for a hand-held power tool (2) and which includes a rotatable drive member (22), a driven member (26) oscillatingly pivotable about a wobble axis (T) and a wobble bearing (30) for connecting the driven member (... | 07/29/2008 |
| 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 |
| 7395872 | Switching device The present invention is directed to a switching device with a rotatably mounted operating element (10) and an eccentric element (12) for translating a rotational displacement (14) of the operating element (10) into a translatory displace... | 07/08/2008 |
| 7383895 | Impact power tool It is an object of the invention to provide an improved technique for lessening an impact force caused by rebound of a tool bit after the striking movement of the tool bit. Representative impact power tool (101) includes a tool body (103), a hammer act... | 06/10/2008 |
| 7357194 | Percussion power tool A percussion power tool includes a motor (6) located in the tool-housing (4) for driving the output member (12) and the percussion mechanism (10), a chuck (20) for receiving a working tool (22), a locking mechanism (24 | 04/15/2008 |
| 7359194 | Device and method for cooling an electronics unit A device for cooling an electronics unit, in particular a control electronics unit of a hand-held power tool, has an air-conducting device that directs at least a portion of an air stream exiting an electric motor to the electronic unit, while a method for cooling i... | 04/15/2008 |
| 7334647 | Rotary tool An overload clutch assembly for a power tool having two torque settings through which rotary drive is transmitted to a spindle. The overload clutch assembly is capable of being between switched between the two torque settings by at least one actuator. The clutch ass... | 02/26/2008 |
| 7331408 | Power tool housing A transmission housing for a hammer drill comprises two clamshell halves and that mate to define a first transmission housing chamber and a second transmission housing chamber disposed on either side of a ball bearing race. The first and second transmission housing ... | 02/19/2008 |
| 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 |
| 7325624 | Hammer drill having switching mechanism for switching operation modes A switching mechanism switches on and off transmission of a striking force to a working tool, and switches on and off transmission of a rotational force to the working tool, thereby switching operation modes among at least a rotation and strike mode, a strike only m... | 02/05/2008 |
| 7320368 | Power impact tool The object of the invention is to ease of operation of the power impact tool. Such object is achieved by a representative power impact tool according to the invention including a motor, a tool bit, a trigger and a mode changing member. The trigger is manually operat... | 01/22/2008 |
| 7308950 | Drilling and/or hammering tool A hand held electrically powered drilling and/or hammering tool comprises a balanced motor sub-assembly including a radial fan mounted to the armature shaft at a first end of the motor with the fan blades facing away from the motor, and motor the sub-assembly is mou... | 12/18/2007 |
| 7306046 | Portable power tool A hand power tool has an electric motor, which is located in a housing and by way of which a tool insert located in a tool retainer is drivable in rotation, a guard device with which an uncontrollable blockage of the tool insert is detectable via a sensor unit and w... | 12/11/2007 |
| 7306049 | Mode change switch for power tool A gear wheel is rotatably mounted on a drive shaft. The drive shaft has a plurality of longitudinal splines formed thereon. A drive sleeve surrounds the drive shaft and has a plurality of the inner splines formed on its interior surface. The inner splines slidably i... | 12/11/2007 |
| 7303026 | Hand power tool, in particular drill hammer and/or jackhammer A hand power tool has a housing, and drive motor accommodated in the housing, a tool receptacle in which a tool is guided, a gear mechanism, a driving gear, and rotary sleeve arranged so that via the gear mechanism, the driving gear, and the rotary sleeve the tool r... | 12/04/2007 |
| 7287600 | Hammer drill with wobble mechanism and hollow drive shaft A hand power tool has a housing, a drive motor and a gear mechanism arranged in the housing. A tool receptacle accommodates a tool, and a gear wheel drives a rotary sleeve in rotation from the drive motor and the gear mechanism and thereby the tool receptacle. A ham... | 10/30/2007 |
| 7264065 | Shifting device A shifting device has a first shifting element, a second shifting element, and a rotatably supported user-operation element including a converter element for converting a rotary motion of the user-operation element into a displacement of the first shifting element i... | 09/04/2007 |
| 7258173 | Electric power tool An electric power tool includes a percussion mechanism (15) located in an external housing (12) of the power tool (11) and driven by a driving motor (13) connected with the percussion mechanism (15) by a gear unit (14). An a... | 08/21/2007 |
| 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 |
| 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 |
| 7191847 | Drive for a motor-driven hand-held tool A drive for a motor-driven hand-held tool includes a motor (17) and a gear mechanism (20) for converting a rotational movement of the motor (17) into a reciprocating movement of the reciprocating drive element (30) for a working tool, wit... | 03/20/2007 |
| 7143842 | Power tool It is an object of the invention to provide a reciprocating power tool having a further improved power transmitting mechanism for converting a rotating output of a driving motor into linear motion in the axial direction of the tool bit. The representative reciprocat... | 12/05/2006 |
| 7140450 | Percussion tool A percussion tool is described and which includes a housing mounting a tool bit; a reciprocally moveable hammer borne by the housing and which is operable to repeatedly strike the tool bit; and a reciprocally moveable piston enclosed within the hammer and which impa... | 11/28/2006 |
| 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 |
| 7121359 | Drilling hammer having an external mechanism for selectively switching operation between impact drilling and chiseling modes The present invention relates to a drilling hammer comprising a hammer tube (13) that is rotationally drivable inside a housing (10), a striking tool (14) located in the hammer tube (13) and provided with a piston (15) that can dri... | 10/17/2006 |
| 7121360 | Hand-held power tool A hand-held power tool includes a percussion mechanism (3) arranged in the tool housing (2), and a motor (4) for driving the percussion mechanism and connected therewith by a gear unit (5), with the percussion mechanism including an eccen... | 10/17/2006 |
| 7096973 | Power tool It is an object of the invention to provide a technique for further improving the vibration reducing performance in the power tool, while avoiding complicating the construction of the power tool. According to the present invention, a representative power tool may co... | 08/29/2006 |
