Patent application number | Description | Published |
20080202782 | Hand-held power tool with a pneumatic percussion mechanism - A pneumatic percussion mechanism for a hand-held power tool includes a percussion piston ( | 08-28-2008 |
20100263894 | Pneumatic striking mechanism and hand-held power tool - A pneumatic striking mechanism includes a guide cylinder in which a freely moving piston and an exciter piston are arranged movably along a striking axis. The guide cylinder has a plastic. The striking mechanism includes a pneumatic chamber sealed off by the guide cylinder, by the freely moving piston and by the exciter piston, as well as a drive for periodically moving the exciter piston, as a result of which the freely moving piston is excited to execute a periodical movement between the striking surface and the exciter piston. | 10-21-2010 |
20100282484 | Side handle for a hand-held power tool - A side-handle for a hand-held power tool includes a gripping element and a fastener for fastening the side handle to the hand-held power tool. The gripping element and the fastening means can be pivoted with respect to each other around a rotational axis. This rotational axis runs perpendicular to a longitudinal axis of the gripping element and runs through an end area of the gripping element facing away from the fastener. | 11-11-2010 |
20100300718 | Machine tool - The machine tool includes a pneumatic percussion mechanism having a cup-shaped exciter cylinder ( | 12-02-2010 |
20110303429 | POWER TOOL AND CONTROL METHOD - A power tool and control method is disclosed. The power tool has a striker, which is guided along an axis parallel to an impact direction. A pneumatic chamber has a volume which varies with a movement of the striker along the axis. A valve device that is actuatable depending upon the movement direction of the striker connects the pneumatic chamber with an air reservoir. The valve device is actuated to open in the case of a movement of the striker in the impact direction and in the case of a movement of the striker against the impact direction is actuated to throttle or close. The throttled or closed valve device restricts an air flow flowing through it to a maximum of one tenth of the value as compared to the air flow in an opened position. | 12-15-2011 |
20110303430 | POWER TOOL - A power tool is disclosed. The power tool has a striker, which is guided along an axis in a guide tube. A pneumatic chamber has a volume which varies with a movement of the striker. The pneumatic chamber is closed by the striker, the guide tube and a valve device. The valve device has in a flow channel a sealing element that is moveable between two positions in a bearing along the axis. The flow channel has a first cross-sectional area in a first of the two positions of the sealing element adjacent to a first mating surface of the bearing, and the flow channel has a second cross-sectional area in a second of the two positions of the sealing element adjacent to second mating surface of the bearing offset from the first mating surface along the axis. The second cross-sectional area is greater than the first cross-sectional area. | 12-15-2011 |
20110303431 | POWER TOOL - A power tool is disclosed. The power tool includes a striker, a guide tube in which the striker is guided along an axis, and a pneumatic chamber, which is closed by the striker, the guide tube and a valve device actuated by its own medium. A volume of the pneumatic chamber changes in the case of a movement of the striker along the axis. The valve device has a swivelable sealing element between the striker and the guide tube. The swivelable sealing element is swiveled into a retracted position when the striker moves in the impact direction and is swiveled into an extended position when the striker moves against the impact direction. In the retracted position, the sealing element has a first inflow surface. In the extended position, the sealing element has a second inflow surface. The second inflow surface is larger than the first inflow surface. | 12-15-2011 |
20120298393 | Machine Tool - The machine tool according to the with a pneumatic hammer mechanism comprises a motorized exciter, a guiding tube, and a piston-shaped beater. The piston-shaped beater is guided by an interior surface of the guiding tube along an operating axis and with the exciter encloses an air spring in a guiding tube. The beater shows a cup-shaped basic body with an open hollow space facing the exciter and an inset filling the hollow space. The basic body is made from a first material with a first density and the insert is made from a material with a second density, which is lower than the first density. | 11-29-2012 |
20120313333 | TOOL RECEPTACLE - A tool receptacle is disclosed. The tool receptacle has a spindle which has a receiving area for receiving a tool and an elongated hole which is open into the receiving area in a radial direction. A barrier element disposed in the elongated hole projects into the receiving area and is movable in the elongated hole. A slider is used for sliding the barrier element to an output-side end of the elongated hole, where the slider is subject to the application of force by a first spring against an insertion direction. A radial limit stop forces the barrier element in the radial direction to engage in the receiving area. The radial limit stop is displaceable to enable a radial movement of the barrier element out of engagement with the receiving area. A second spring applies a spring force to the radial limit stop against the insertion direction. | 12-13-2012 |
20130277077 | MACHINE TOOL - A hand-held machine tool includes a tool accept for mounting a chiseling tool on an operating axis. A pneumatic hammer mechanism includes a hammer mobile on an operating axis, an exciter, and a pneumatic chamber sealed by an exciter and the hammer, which couples the movement of the exciter to the hammer. The exciter is driven by a motor and moves back and forth between a frontal dead point distant from the tool and a dead point near the tool. A damper device includes a supercharger and a controlled outlet valve. The controlled outlet valve allows air to flow from the supercharger into the pneumatic chamber when the exciter is in the proximity of the dead point distant from the tool. | 10-24-2013 |
20130277080 | HAND-HELD POWER TOOL - A hand-held power tool has a pneumatic striking mechanism ( | 10-24-2013 |
20130284473 | HAND-HELD MACHINE TOOL AND CONTROL METHOD - A hand-held machine tool includes a tool accept for mounting a chiseling tool on an operating axis. A pneumatic hammer mechanism includes an exciter, driven back and forth by a motor about a stroke between a dead point distant from the tool and a dead point near the tool, a hammer moved back and forth on the operating axis between a reversal point distant from the tool and a point of impact, and a pneumatic chamber sealed by the exciter and the hammer, which couples the movement of the hammer to the movement of the exciter. A damping device increases the pressure in the pneumatic chamber when the exciter during its motion in the direction to the dead point distant from the tool has approached to less than half the stroke to the dead point distant from the tool. | 10-31-2013 |
20140014383 | HAND-HELD POWER TOOL - The hand-held power tool has a tool socket, a motor and a pneumatic striking mechanism. The striking mechanism has an exciter driven by the motor along a working axis, a striker coupled to the exciter via an air cushion, and an intermediate striker arranged between the striker and the tool socket in the striking direction. The striking mechanism also has a guide in which the intermediate striker is guided. The guide has a first sliding surface that guides a first section of the intermediate striker, and a second sliding surface that is arranged offset relative to the first sliding surface in the striking direction and that guides a second section of the intermediate striker. A radial dimension of the first section of the intermediate striker is greater than a radial dimension of the second section of the intermediate striker. | 01-16-2014 |
20140054056 | HANDHELD POWER TOOL - A handheld power tool has a switchable gear component actuatable by a selector switch. The gear component moves from a first operating position into a second operating position. The selector switch has a first switching position associated with the first operating position and a second switching position associated with the second operating position, and movable so that intermediate positions are assumed. A traveling coupling between the selector switch and the gear component has a spring exerting force onto the gear component in the first direction. A locking bolt is coupled to the selector switch in a positively driven manner. In the intermediate positions, the locking bolt is moved into a blocking bolt position blocking movement of the gear component out of the first operating position into the second operating position. When the selector switch is in the second switching position, the locking bolt is in a releasing bolt position. | 02-27-2014 |
20150021876 | Folding Bicycle - The present invention produces a folding bicycle ( | 01-22-2015 |
20150060099 | MACHINE TOOL - A machine tool is disclosed. The machine tool has a tool receptacle for receiving a tool on a working axis, a housing, and a striking mechanism. An impact stop is provided for a beater or an intermediate beater. An impact absorber has two polymer-based absorber rings that are offset axially to one another and are disposed so that they overlap radially and has two iron-based disks disposed axially between the absorber rings. | 03-05-2015 |