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| Number | Title | Issue Date |
| 7410006 | Power tool anti-kickback system with rotational rate sensor A control system is provided for use in a power tool. The control system includes: a rotational rate sensor having a resonating mass and a controller electrically connected to the rotational rate sensor. The rotational rate sensor detects lateral displacement of the... | 08/12/2008 |
| 7395874 | Slaving and blocking device A slaving and blocking device for transmitting a torque from a driving part to a driven part and for stopping the driven part at a torque engaging the driven part has a slaving unit fixable on the driving part fixed against relative rotation and having slaving claws... | 07/08/2008 |
| 7334648 | Rotary impact power tool A impact power tool includes a motor rotating a drive shaft, an output shaft holding a tool bit, and a hammer coupled to the drive shaft. The hammer is rotatable together with the drive shaft and is engageable with an anvil fixed to the output shaft so as to give a ... | 02/26/2008 |
| 7316341 | Adjustable exhaust assembly for pneumatic fasteners An adjustable exhaust assembly for a pneumatic fastener includes a base, which includes a base plate and a protrusion protruding from the base plate. The protrusion is centrally hollow and includes an inner surface and an outer surface. The base plate includes an in... | 01/08/2008 |
| 7090031 | Intelligent tightening spindle with integrated measurement transducer, servo amplifier, and data processing unit An intelligent tightening spindle comprises a drive output; a housing adapted to detachably mount to a moving platform of a multi-tool processing station, with the housing substantially enclosing: at least one electric drive motor having an associated servo amplifie... | 08/15/2006 |
| 7040414 | Pneumatic tool A pneumatic tool includes a housing, a driving mechanism, a rear cap, a direction controller, a speed controller, and an operating member. The housing is formed with a component chamber and an intake passageway. The driving mechanism includes an output shaft rotatab... | 05/09/2006 |
| 6971454 | Pulsed rotation screw removal and insertion device A drill/driver (e.g. an electric drill) with a screwdriver bit attachment, and a method of controlling the drill/driver, are described. This method of control will greatly reduce the occurrence of stripped screw heads on most types of screws. By periodically stoppin... | 12/06/2005 |
| 6854529 | Optimizing method for regulating the operating state of a guided machine tool comprising a rotating percussion tool during a boring process Disclosed is an optimizing method for regulating the operating state of a guided machine tool having a tool rotating at a certain speed and subjected to a percussion frequency during a boring action, in which the tool, subjected in addition to a force, is driven int... | 02/15/2005 |
| 6536537 | Screw drivers The present invention relates to a powered screw driver having a spindle 20 that is caused to rotate by an electric motor 10 within a range of about 5000 rpm (revolutions per minute) to about 7000 rpm (revolution per minute) when the spindle 20 idles. Bec... | 03/25/2003 |
| 6484814 | Electric hand tool implement with no-load stroke disconnection An electrical hand operated tool driving device (1) for producing an at least partially impacting movement of a tool (11) with an air striking mechanism (2) and a no-load stroke disconnection, which scans the no-load stroke position (9) by a sensor (14) a... | 11/26/2002 |
| 5839518 | Centrifugal force-controlled coupling switch mechanism for an electric drill A centrifugal force-controlled coupling switch mechanism including a rotary base coupled between a reversible motor shaft of a reversible motor and an output shaft, an eccentric block pivoted to the rotary base and adapted for controlling engagement betwe... | 11/24/1998 |
| 5786812 | Tablet pointer The invention concerns a tablet pointer that enables the drag mode to be retained even when the operation surface of a tablet sheet is so narrow that the stylus press-held thereto needs to be temporarily lifted off. Switch data generating member provided ... | 07/28/1998 |
| 5740892 | Power wrench torque transmission mechanism A torque transmission mechanism to be used in a power wrench includes a body driven by a motor, having a central bore to rotatably support therein a toothed end of an output shaft. The toothed end of the shaft has a pair of diametrically opposite teeth, e... | 04/21/1998 |
| 5379851 | Power screwdriver A power screwdriver disclosed includes a housing, a reversible motor, a screw-driving device, a transmitting shaft, and a handle. The screw-driving device includes a centrifugal clutch, a rotor and an engaging set. The shaft is connected to the motor at o... | 01/10/1995 |
| 5156221 | Method of and arrangement for controlling the operation of a hand-held electrical device An electrical hand-held device, such as a screwdriver or the like, includes an output shaft, a drive motor for driving the same, an actuating coupling for connecting the output shaft with the drive motor, a distance sensor for sensing a coupling position,... | 10/20/1992 |
| 5154242 | Power tools with multi-stage tightening torque control A power tool includes a DC motor for tightening a fastener through three consecutive stages. In the first stage, the motor is rotated at a high speed to tighten the fastener to a pre-seated condition which is acknowledged by the tool. Then, the motor is t... | 10/13/1992 |
| 4947939 | Structure of motorized screw bolt driving tool A motorized screw bolt driving tool includes a centrifugal element to drive a brake socket to disengage from a swivel element permitting a brake element to swing in a notch on the swivel element so that a spindle can be driven by a motor to rotate clockwi... | 08/14/1990 |
| 4729436 | Ball and disc over-speed shut-off mechanism for a rotary pneumatic tool A rotary pneumatic tool includes an over-speed shut-off mechanism including a shiftable spring washer and flyweights for imparting a shifting force to the spring washer dependent on the speed of the tool. In the preferred embodiment, the spring washer is ... | 03/08/1988 |
| 4444272 | Overspeed safety device In a pneumatically powered rotating grinding machine there is provided a safety unit (13) comprising a speed governor and an overspeed release mechanism the purpose of which is to ensure a predetermined maximum speed. For safety reasons, the motor speed m... | 04/24/1984 |
| 4359107 | Shut-off apparatus for pneumatic driven tools The improved shut-off apparatus for pneumatically driven tools includes an auxiliary shut-off valve located in the flow passageway. The valve is controlled by a control rod which extends through the air motor into engagement with a latching device. The la... | 11/16/1982 |
| 4351078 | Driving arrangements for floor maintenance machines A floor maintenance machine includes a machine housing, a treating tool mounted on the machine housing for positional adjustment toward and away from the surface to be treated as considered in the operative position of the machine, an electric motor havin... | 09/28/1982 |
| 4346765 | Speed responsive motor shutoff mechanism for fluid operated tool A portable pneumatic tool includes a valve closure member interposed in the tool motor exhaust passage and engaged with a speed responsive mechanism comprising a plurality of flyweights operable to move the closure member to an open position on starting o... | 08/31/1982 |
| 4307784 | Shut-off apparatus for pneumatic driven tools The improved shut-off apparatus for pneumatically driven tools includes an auxiliary shut-off valve located in the flow passageway. The valve is controlled by a control rod which extends through the air motor into engagement with a latching device. The la... | 12/29/1981 |
| 4291771 | Rotary percussion hydraulic drilling machine A rotary percussion hydraulic drilling machine has striker piston slidably mounted inside a cylinder which defines a first annular chamber connected to a one-way valve slidably mounted inside a chamber connected to an accumulator comprising a diaphragm, l... | 09/29/1981 |
| 4222702 | Deceleration sensitive air tool shutoff A shutoff mechanism for a pneumatic tool such as a nut runner senses both the instantaneous speed and the instantaneous rate of change of speed of the drive components of the tool. The mechanism controls the flow of air to the motor and terminates such fl... | 09/16/1980 |
| 4057113 | Pneumatically powered hand tool with speed-control governor A pneumatic hand tool comprises a housing having a compressed-gas inlet and provided with a pneumatically powered motor which carries on one side a tool holder such as a chuck and on the other side a governor. A speed-control valve is operated by the gove... | 11/08/1977 |
