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7621032 |
Method and apparatus for controlling the rate of pressure applied to an air controlled device
A method and an apparatus for controlling the rate of pressure applied to an air controlled device. The apparatus includes a flow restrictor, a regulator, and a dome loaded regulator. The regulator...
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7607492 |
Electric motor impact tool
An electric impact tool in which a rotating mass rotates in a forward direction to impact upon and transfer torque to an anvil, and rotates in a reverse direction opposite the forward direction in...
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7600577 |
Device for sensing the direction of rotation of a hand tool comprising an electric motor
A device for sensing a direction of rotation of a hand tool having an electric motor, has a rotatably supported brush plate provided in the electric motor and located in different positions...
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7591326 |
Power tool
It is an object of the invention to provide an effective technique for improving the durability of a torque limiter utilized in a power tool. The object is achieved by a representative power tool...
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7591324 |
Clutch device for an electric machine tool and an electric machine tool
A clutch device for an electric machine tool that is drivable in a fashion selected from the group consisting of a rotary fashion, a percussion fashion, and both with an impact mechanism...
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7588098 |
Controller for use with an electric screwdriver
An object of the present invention is to provide an electric screwdriver device having a function for determining that a correct tightening operation has been carried out when the tightening...
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7578357 |
Driver with external torque value indicator integrated with spindle lock and related method
A power tool generally includes a housing and a motor assembly connected to a transmission assembly. The motor assembly and the transmission assembly are secured against rotation in the housing. A...
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7565935 |
Powered tap driver with rotary control structure
The tap driver is configured to be hand-held. It has a tap-holding chuck and a motor to drive the chuck. An external switch rocks forward to rotate the motor in the tapping direction and backward...
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7562720 |
Electric motor impact tool
An electric impact tool in which a rotating mass rotates in a forward direction to impact upon and transfer torque to an anvil, and rotates in a reverse direction opposite the forward direction in...
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7556103 |
Tightening tool and tightening tool management system
A fastening tool with a clutch for shutting off transmission of torque, capable of self-diagnosing fastening torque of a screw or the like at low cost without using expensive elements such as a...
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7552781 |
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...
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7506694 |
Rotary tool
A hand held motor driven electrically powered tool, in particular a rotary hammer, comprising a spindle ( 40 ) for rotatingly driving a tool or bit ( 68 ), a spindle rotary drive train ( 14, 5, 10...
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7487845 |
Safety mechanism for a rotary hammer
An improved method is provided for controlling a power tool having a rotary shaft. The method includes: disposing an inertial mass in a housing of the power tool, such that the inertial mass is...
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7487844 |
Drill with solid state speed control
A power tool includes solid-state motor control. The tool includes a solid state variable speed control signal generator for generating a variable speed control signal, a microcontroller for...
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7484569 |
Pulse tool
A pulse tool, in particular a pulse nutsetter, has at least one pneumatic drive unit with a drive rotor and a pulse unit driven by the drive unit, wherein a delay-dependent inertial cut-off device...
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7469753 |
Power tool, drive assembly, and method of operating the same
A power tool including a drive assembly including a first clutch assembly having an engaged configuration, in which the first clutch assembly transfers a drive force from a motor shaft to a...
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7467669 |
Method for governing the operation of a pneumatic impulse wrench and a power screw joint tightening tool system
A method and a power tool system are provided for performing screw joint tightening using a pneumatic torque impulse power tool that is controlled by a control unit. A torque magnitude and a torque...
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7464769 |
Electric screwdriver and a controller thereof
An object of the present invention is to provide an electric screwdriver device having a function for determining that a correct tightening operation has been carried out when the tightening...
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7455123 |
Hand-held power tool with a torque-limiting unit
A hand-held power tool has a motor output shaft, a tool driver, and a torque-limiting unit with which a maximum torque transferred from the motor output shaft to the tool driver is adjustable by an...
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7455121 |
Power tool
A power tool includes an impact damping mechanism for damping an impact in a direction of rotation of a speed reduction mechanism portion 8.
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7428934 |
Impact fastening tool
In an impact fastening tool, erroneous detection of a strike by a hammer is prevented. The impact fastening tool includes a strike mechanism that transmits a driving force of a motor to an output...
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7424919 |
Method for determining the angular movement of the output shaft of an impulse nut runner at tightening a screw joint
A method for determining the angular displacement of the output shaft (φ 0 ) of an impulse nut runner at tightening a screw joint to a predetermined final torque level (T f ) by an impulse nut...
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7419013 |
Rotary impact tool
A rotary impact tool can be used in a work especially precision or finishing of fastening is important. The rotary impact tool comprises a rotary driving mechanism including a driving source for...
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7413029 |
Screw fastening machine
The present invention aims to provide a screw fastening machine for reliably switching and changing a driving force transmitting path with the seating on a work as a reference. According to the...
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7413025 |
Torque tool
A torque tool comprises a torque converter, a power tool for actuating the converter and an attachment adapter, interposed between the torque converter and the power tool, for coaxially and firmly...
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7410007 |
Impact rotary tool with drill mode
An impact rotary tool is provided that is switchable between an impact mode where the tool delivers an impacting torque on an output tool and a drill mode where the driver delivers a smooth output...
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7398700 |
Bolt tightening method and bolt tightening apparatus
After it is tightened with a snug torque T A , a bolt is tuned by a total turning angle θ S equivalent to the sum of an initial-set turning angle θ A and a corrective additional-turning angle...
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7395875 |
Rechargeable battery-operated hand machine tool
The invention is based on a rechargeable battery-operated hand machine tool ( 10 ) having an electric drive motor ( 18 ) accommodated in a housing ( 12 ) and powered by a rechargeable battery ( 20...
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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...
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7395873 |
Power tool
A power tool includes a grip portion having a vertically extending axis; a main body provided at a top end of the grip portion and having an axis intersecting the vertical axis; a motor; an output...
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7395871 |
Method for detecting a bit jam condition using a freely rotatable inertial mass
An improved method is provided for controlling a power tool having a rotary shaft. The method includes: disposing an inertial mass in a housing of the power tool, such that the inertial mass is...
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7377331 |
Damping driving axle
A damping drive axle includes an output shaft divided into a first portion and a second portion, a mounting seat having a centrally defined hole, a first compartment to correspond to and receive...
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7372228 |
Electric power tool with memory capability
The invention relates to an electric power tool having a control and/or regulating device for an electric motor. It is provided that the control and/or regulating device ( 4 ) is assigned an...
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7350286 |
Rotational and axial power transmitting apparatus
Threaded member assembling can be performed using a rotational/axial-movement-transmitting unit including an upper frame; a motor held by the upper frame; a female threaded member secured to the...
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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...
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7334646 |
Electric power tool with improved speed change gearing
A battery-operated driver-drill ( 1 ) includes an epicycle reduction gear unit ( 8 ) which encases a switchover sleeve ( 26 ) having inner teeth ( 27 ) and outer teeth ( 28 ). The gear unit ( 8 )...
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7331406 |
Apparatus for controlling a fastener driving tool, with user-adjustable torque limiting control
An improved hand-held fastener driving tool is provided with an adjustable torque limiting control. The tool is portable, and is electrically powered using either a battery pack or a power cord as...
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7311027 |
Electric screwdriver
An electric screwdriver capable of reducing the reactive force produced on the occasion of a screw tightening work, etc. The electric screwdriver is designed to transmit the rotational driving...
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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...
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7237622 |
Pneumatic tool having pressure release device
A pneumatic tool includes a rotor rotatably received in a housing, a driving shank coupled to the rotor, for being rotated by the rotor and by a pressurized air and having one end for driving a...
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7234536 |
Power screwdriver
A power screwdriver is disclosed having a drive which is coupled via a clutch, disengaging as a function of torque, to a tool drive shaft for driving a tool. The screwdriver comprises an electronic...
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7210878 |
Feed adaptation core drill
A process for controlling and a core drilling machine ( 1 ) having an electrical motor ( 2 ) for rotational drive of a core drill bit ( 3 ) having cutting edges ( 5 ) oriented axial to a work piece...
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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...
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7185713 |
Air-driven screwdriver performs hole drilling, thread tapping and bolt tightening
A novel air-driven screwdriver is integrally designed to perform three functions, hole drilling, thread tapping and bolt tightening with special characteristic in which a passive inner gear...
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7182147 |
Tool apparatus, system and method of use
A system, and a method of using a system, for controlled tool operation. The method includes providing a tool used in a force application such as a such torque application. The tool communicates...
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7121361 |
Electric power tool with improved speed change gearing
A battery-operated driver-drill ( 1 ) includes an epicycle reduction gear unit ( 8 ) which encases a switchover sleeve ( 26 ) having inner teeth ( 27 ) and outer teeth ( 28 ). The gear unit ( 8 )...
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7093679 |
Foundation drilling apparatus and method with continuously variable hydraulic differential rotary table
A drilling machine drills foundation holes known as drilled shafts or bored piles with a drilling tool attached to an end of a kelly. The kelly is rotated with a rotary drive. The rotary drive has...
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7091683 |
Method of monitoring and controlling the seating of screws to the optimum point of grip independent of screw size and material density
A method of controlling a motor ( 106 ) used to drive a screwdriver bit ( 105 ) such that screws ( 107 ) are seated to the optimum point of grip between the screw ( 107 ) and the work piece...
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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:...
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7089080 |
Pulse tool controller
This is a system for monitoring and controlling a compressed air driven, pulse tool. The system includes a means for measuring air pressure supplied to a pneumatic pulse tool and converting the air...
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