Patent application number | Description | Published |
20080296034 | Percussion Mechanism with a Striking Pin and an Associated Catching Mechanism - The invention relates to a percussion mechanism ( | 12-04-2008 |
20080303358 | ELECTRIC POWER TOOL WITH A ROTATABLE BRUSH PLATE - The invention is based on an electrical power tool with an electrical machine, having a motor housing that receives the electrical machine and having a rotatable brush plate for reversing a direction of rotation of the electrical machine. The brush plate is covered in its cross section by a pivotable cover. | 12-11-2008 |
20090120658 | HAND-HELD POWER TOOL - A portable power tool, particularly a hammer drill and/or chipping hammer, comprising a main element ( | 05-14-2009 |
20090294144 | Hand-held power tool - A hand-held power tool has a main element; a main handle fastened to the main element, the main handle being supported such that the main handle is movable relative to the main element, the main element including a tool fitting that defines a tool axis and the center of gravity that defines a normal direction oriented perpendicular to the tool axis and pointing toward the center of gravity, the main element being moved out of a stationary position toward the main handle so that a portion of at least 10% by weight of the main element is guided with a movement component in the normal direction along a trajectory. | 12-03-2009 |
20100018734 | ELECTRIC MACHINE TOOL - The invention relates to an electric machine tool comprising a device body ( | 01-28-2010 |
20100038104 | HAND HELD MACHINE TOOL - The invention relates to a hand-held machine tool for driving a bit which can be accommodated in a tool holder, with a rotary and/or hammer action. The machine tool includes a drive train which has a drive side associated with a drive unit and a driven side associated with the tool holder. According to the invention, the hand-held machine tool has at least one decoupling unit that is used to form a rotationally elastic coupling between the drive side and the driven side. | 02-18-2010 |
20100084151 | ELECTRICAL DEVICE WITH LOCKED-ON ROTATABLE OPERATING ELEMENT - The invention relates to an electric device, and in particular to an electric hand-held machine tool, having a housing, a rotatable actuating element arranged outside the housing and a functional switch element, arranged inside the housing and connected to the actuating element in a rotationally fixed manner. According top the invention, it is provided that the actuating element and the functional switch element are locked together through an opening in the housing. | 04-08-2010 |
20100176561 | TOOL HOLDER FOR A POWER TOOL, PARTICULARLY FOR A CHISEL HAMMER AND/OR ROTARY HAMMER - The invention relates to a tool holder for an electric tool, particularly for a chisel hammer and/or drill hammer. A tool receptacle is provided for receiving a cylindrical shaft of an insertion tool introduced through an insertion opening. The cylindrical shaft has at least two diametrically opposed detent depressions on its circumferential surface. The tool holder further has a locking device having at least one locking element, at least one blocking element and at least one restoring element. According to the invention, the locking device has at least two locking elements. Upon insertion of the cylindrical shaft of the insertion tool, the restoring element applies different forces to the locking elements of the locking device. | 07-15-2010 |
20110114348 | MULTI-GEAR TRANSMISSION DEVICE AND POWER TOOL - The invention relates to a multi-gear transmission device, particularly a two-gear transmission device, for transferring a drive torque from an input side to an output side, which transmission device has at least two selectable gear ratios. The multi-gear transmission device further has a multi-stage clutch device, particularly a two-stage clutch device, with at least two different, selectable limit torques. According to the invention, the multi-stage transmission device has at least two preferably switchable translating gear pairs, and the multi-stage clutch device is included in the translating gear pairs. | 05-19-2011 |
20110139471 | METHOD FOR OPERATING A POWER TOOL HAVING A CLUTCH DEVICE - The invention relates to a method for operating power tool, particularly an electrically driven hand power tool, having at least one tool drive shaft for directly or indirectly rotationally driving a tool insert. The tool insert is received in a tool holder releasably connected to the tool drive shaft. The tool drive shaft can be coupled to a drive device via a clutch device. The clutch device is provided with at least two different limit torques, which are selectable by an operator. When the tool insert and/or the tool holder is changed out, the clutch device is reset to a lower limit torque of the at least two different limit torques, particularly the lowest possible limit torque. | 06-16-2011 |
20110139473 | POWER TOOL HAVING CLUTCH DEVICE - The invention relates to a power tool, in particular an electrically operable hand-held power tool, having at least one tool drive shaft for direct or indirect rotary drive of an insert bit, with the insert bit being accommodated in a tool holder that is connected or detachably connected to the tool drive shaft, particularly in a replaceable fashion. At least one drive device and at least one clutch device that couples the at least one drive device to the at least one tool drive shaft is provided which has at least two different, user-selectable, limit torques. An actuating device is provided that makes it possible, with a replacement of the insert bit and/or a replacement of the tool holder, to reset the clutch device to a lower limit torque, preferably to the lowest possible limit torque. | 06-16-2011 |
20110139477 | HANDHELD POWER TOOL - The invention is based on a handheld power tool, having at least one vibration-cancelling device that has at least one cancellation spring and one cancellation mass. It is proposed that the cancellation mass is constructed of at least one first mass part and at least one second mass part. | 06-16-2011 |
20110253404 | HAND-HELD POWER TOOL - A hand-held power tool, has a main element having a tool axis, a center of gravity, and a normal axis which extends perpendicular to the tool axis and through the center of gravity, and the tool axis and the normal axis define a plane of motion, a handle supported in the plane of motion such that it is movable relative to the main element, a spring unit connecting the handle with the main element, the spring unit including a spring element and is provided to at least substantially define a trajectory of at least one portion of the handle in the plane of motion under an influence of a load force which is triggered when the handle is moved out of a neutral position and approaches the main element which is stationary, the handle having a handle body, a rotary element which connects the handle body and the main element and in interaction with the spring unit defines a joint-free rotation axis about which the handle rotates in the plane of motion when a motion takes place relative to the main element, and wherein the rotary element is supported such that it is rotatable relative to the main element and to the handle body. | 10-20-2011 |
20120227995 | Connecting Rod Drive Comprising an Additional Oscillator - An electric tool includes a striking mechanism assembly, which can be driven in and against a striking direction in a cyclic manner, and a counter-oscillator for compensating for vibrations of the electric tool, in particular of housing oscillations, comprising a balancing mass. The balancing mass can be driven in a movement direction by driving the striking mechanism assembly, wherein the movement direction extends at an angle to the striking direction. | 09-13-2012 |
20120255753 | HAND-POWER TOOL WITH AN OSCILLATION-DAMPING DEVICE - A hand-power tool includes at least one oscillation-damping device that has at least one damping spring, a damping mass, and a mechanism housing. The oscillation-damping device has at least two retaining parts that at least partly enclose the damping mass. | 10-11-2012 |
20120279741 | VARIATION OF THE NATURAL FREQUENCY OF VIBRATORY MEANS IN ELECTRIC TOOLS - An electric tool includes a vibratory means which is configured to impart a counteracting vibration which counteracts a housing vibration of the electric tool. A vibration-relevant characteristic of the vibratory means can be adapted during the operation of the electric tool in such a way that the amplitude, the phase position and/or the frequency of the counteracting vibration varies with a change in the vibration-relevant characteristic. The vibratory means of the electric tool has a natural frequency which can be varied by variation means of the electric tool. A method for compensating housing vibrations, in particular of the electric tool, includes imparting a counteracting vibration by a vibratory means which counteracts a housing vibration of the electric tool. The amplitude, the phase position and/or the frequency of the counteracting vibration is varied during the operation of the electric tool. | 11-08-2012 |
20120286461 | CONTROLLED OSCILLATION DAMPER - An oscillation reduction system for an electric tool includes a first substance that is arranged on an elastic element. The first substance is configured to reduce housing oscillations by providing a relative motion with respect to a housing of the electric tool. The oscillation reduction system further includes a second substance that can be driven depending on the relative motion of the first substance with respect to the housing. An electric tool includes the oscillation reduction system. | 11-15-2012 |
20120318551 | Hand-Power Tool Comprising an Oscillation-Damping Device - A hand-power tool includes at least one oscillation-damping device that has at least one damping spring and a damping mass. The hand-power tool also includes a drive mechanism and a mechanism housing. The mechanism housing has a housing cover which is provided for closing a chamber in which the drive mechanism lies, and the housing cover has at least one fixing mechanism that at least partially fixes the oscillation-damping device in at least one operating state. | 12-20-2012 |
20130192861 | HAND POWER TOOL DEVICE - A hand power tool device includes a hammer tube and a B-impact damping system. The B-impact damping system includes at least one damping mechanism configured to damp recoil energy. The damping mechanism is disposed at least partially radially outside of the hammer tube in at least one operating state. | 08-01-2013 |
20130206434 | ANTI-VIBRATION HANDLE COMPRISING A TENSILE-LOADED SWITCH CONNECTION - An electric machine tool includes a first actuating device and a second actuating device. The second actuating device is arranged at a distance from the first actuating device. The first actuating device is mechanically connected to the second actuating device by a switching connector which is configured to be loaded in tension only. | 08-15-2013 |
20130284477 | OVERLOAD COUPLING - A power tool device, in particular a hammer drill device and/or a chisel device, includes at least one torque limiting unit that is configured to limit a torque in a drivetrain in at least one operating state. The at least one torque limiting unit includes at least two force transmission mechanisms configured to transmit the torque in the at least one operating state. The at least two force transmission mechanisms have different transmission characteristics. | 10-31-2013 |
20140027253 | ELECTRIC MACHINE-TOOL COMPRISING A LOCKABLE ROCKER SWITCH - An electric machine-tool includes an anti-vibration handle casing. A mechanical actuating device and a locking device configured to lock the mechanical actuating device in at least one operating state of the electric machine-tool are arranged in the handle casing. The electric machine-tool also includes an electric switch configured to be moved by the mechanical actuating device into a switched-on and a switched-off position. The handle housing comprises a handle area extending along a longitudinal extension of the mechanical actuating device. The electric switch is arranged outside of the handle area. | 01-30-2014 |
20140319961 | VIBRATION-REDUCED BRUSH HOLDER FOR AN ELECTRIC MOTOR - A brush holder for an electric motor includes a brush magazine forming a receiving space with a wall surface. A carbon brush having an end face and a side face is arranged in the receiving space. The brush holder also includes a spring, which is in contact with the end face and is configured to press the carbon brush in an extension direction of the receiving space. The brush holder also includes a pressing mechanism arranged on a pivot arm and configured to contact the side face and press the carbon brush by the force of the spring in a pressing direction against the wall surface. The pivot arm has a pivot shaft, to which an inner end of the spring is fastened. The pressing mechanism has a rolling surface configured to roll over the side face of the carbon brush when the carbon brush slides in the extension direction. | 10-30-2014 |