Having Torque Sensor Patents (Class 173/181)
  • Patent number: 11014222
    Abstract: In a nut runner with a motor (3) for generating a torque, a tool holder (9) which is operatively connected with the motor (3) and transmits the generated torque to a tool, a measuring device (7) which continuously measures at least one measurement quantity for determining the torque and forwards the measurement value, and a control device (12) which is connected with the motor (3) and the measuring device (7) and controls the operation of the motor (3) such that after starting it generates a continuously increasing torque, and which shuts off the motor upon reaching a setpoint measurement value, the measuring device is a torque sensor (7) and the torque sensor (7) is arranged between the motor (3) and the tool holder (9).
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: May 25, 2021
    Inventors: Jorg Hohmann, Frank Hohmann
  • Patent number: 10957125
    Abstract: A client computing system (CCS) receives a tool measurement from a measurement tool other than by determining the tool measurement from a vehicle data (VD) message. The CCS generates a VD report including a vehicle identifier of a vehicle associated with the tool measurement and the VD report. The VD report can include temporal and/or spatial identifiers pertaining to the tool measurement. The VD report can be provided to a server computing system (SCS) for storage as part of a VD record associated with the vehicle. The CCS that generated the VD report or another CCS can request the VD report from the SCS. The SCS can determine if the requesting CCS is authorized to receive the VD report to maintain the vehicle owner's privacy. The tool measurement can be selected from a service procedure provided to the CCS from SCS and displayed at the CCS.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: March 23, 2021
    Assignee: Snap-on Incorporated
    Inventors: Patrick S. Merg, David Costantino, Lester B. Johnson
  • Patent number: 10883660
    Abstract: An electric power tool in one aspect of the present disclosure comprises a main body, a motor, a driver, a detector, and a kickback determiner. The kickback determiner determines that the main body is kicked back from a workpiece when an attitude change amount of the main body detected by the detector exceeds a preset kickback determination threshold during driving of the motor by the driver.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: January 5, 2021
    Assignee: MAKITA CORPORATION
    Inventors: Takeshi Nishimiya, Hirokatsu Yamamoto
  • Patent number: 10697260
    Abstract: A system for use in a mineral extraction system includes a spinner assembly having a motor configured to drive rotation of a roller shaft. The spinner assembly also includes a roller non-rotatably coupled to the roller shaft and configured to contact a first tubular structure, and rotation of the roller is configured to cause rotation of the first tubular structure until the first tubular structure is spun into a second tubular structure. The spinner assembly further includes a detection wheel coupled to the roller shaft and configured to contact the first tubular structure, and the detection wheel is configured to rotate with the first tubular structure and to rotate independently of the roller. The spinner assembly further includes a sensor configured to detect rotation of the detection wheel.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: June 30, 2020
    Assignee: CAMERON INTERNATIONAL CORPORATION
    Inventors: Ulf Henriksen, Anstein Jorud
  • Patent number: 10562161
    Abstract: A torque wrench for applying a torque to a fastener includes a handle, a user interface carried by the handle, and a fastener drive. The fastener drive can be detachably engaged with the handle and also include a head shaped to receive a fastener. The user interface can indicate an applied torque on the fastener.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: February 18, 2020
    Assignee: General Electric Company
    Inventor: Todd Roland Flath
  • Patent number: 10486281
    Abstract: A power tool includes a motor, a power circuit coupled to the motor, and a speed sensor coupled to the motor. The power circuit provides power to the motor. The speed sensor detects a position of the motor. The power tool also includes an electronic processor coupled to the motor and the speed sensor. The electronic processor is configured to receive an output signal from the speed sensor indicative of a measured speed of the motor at a first time, determine a cumulative value based on the measured speed of the motor, and interrupt power from the power circuit to the motor when the cumulative value exceeds an accumulator threshold.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: November 26, 2019
    Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
    Inventors: David H. Selfors, Brian Trump
  • Patent number: 10322502
    Abstract: The disclosure is based on a sensor device, in particular a hand-held power-tool sensor device, for identifying an uncontrolled occurrence of jamming in the case of a hand-held power tool, having at least one sensor unit, which is provided to sense at least one motion characteristic value of the hand-held power tool, and having a protective unit, which is provided to control the hand-held power tool in dependence on at least one triggering threshold value and the at least one motion characteristic value. It is proposed that the protective unit be provided to set the at least one triggering threshold value in a variable manner and/or to define at least one further triggering threshold value.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: June 18, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Bernd Wirnitzer, Matthias Tauber, Christopher Wiess, Christoph Klee, Hagen Philipp Keinath, Christian Lang, Andreas Schlegel, Stefan Holst
  • Patent number: 10220500
    Abstract: A method is presented for controlling operation of a power tool having an electric motor drivably coupled to an output spindle. The method includes: receiving an input indicative of a clutch setting for an electronic clutch, where the clutch setting is selectable from a plurality of driver modes; setting the value of a maximum current threshold in accordance with the selected one of the plurality of driver modes; determining rotational speed of the electric motor; determining an amount of current being delivered to the electric motor; comparing the amount of current being delivered to the electric motor to the maximum current threshold; and interrupting transmission of torque to the output spindle when the amount of current being delivered to the electric motor exceeds the maximum current threshold and the rotational speed of the electric motor is decreasing.
    Type: Grant
    Filed: October 12, 2015
    Date of Patent: March 5, 2019
    Assignee: BLACK & DECKER INC.
    Inventors: Jongsoo Lim, Brian C. Sterling, Paul S. White, Russell D. Hester
  • Patent number: 9496809
    Abstract: An electric working machine including: a motor; a driving unit configured to be driven by the motor; a trigger switch configured to allow rotation of the motor; a power supply unit configured to supply electric power to the motor; and a control unit configured to control rotation of the motor, characterized in that: the electric working machine further comprises a switching element configured to perform short-circuiting between terminals of the motor to apply electronic braking, wherein the control unit is configured to perform adjustment of the braking by controlling the switching element when stopping the motor.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: November 15, 2016
    Assignee: HITACHI KOKI CO., LTD.
    Inventors: Yasushi Nakano, Yuki Horie, Hirohisa Tomita, Kazuhiko Funabashi
  • Patent number: 9314855
    Abstract: An electric boring tool comprises an electric motor, a switch trigger, a tip tool driven by driving force of the electric motor, a power transmission mechanism for transmitting the driving force of the electric motor to the tip tool as rotational force and/or hammer force, and a motor control unit for controlling speed of the electric motor in response to an extent of pulling of the switch trigger. The motor control unit subjects the electric motor to low speed control after the electric motor is started up, and controls the speed of the electric motor in response to the extent of pulling of the switch trigger when the load current of the electric motor is set value or greater during the low speed control.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: April 19, 2016
    Assignee: HITACHI KOKI CO., LTD.
    Inventors: Takahiro Ookubo, Kazutaka Iwata
  • Patent number: 9186784
    Abstract: A power wrench with a torque sensing unit includes a housing, a motor, an output shaft, and a planetary reduction gearing connecting the motor to the output shaft and including a stationary ring gear supported in the housing, wherein the torque sensing unit includes a torque transferring element with a single radially extending reaction arm arranged to transfer reaction torque from the ring gear to the housing and carrying strain measuring sensors for generating signals in response to the transferred reaction torque. The torque transferring element includes an annular body with two weak portions to be elastically deformed during torque transfer and having flat surfaces for carrying the strain measuring sensors.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: November 17, 2015
    Assignee: ATLAS COPCO INDUSTRIAL TECHNIQUE AB
    Inventors: Erik Vilhelm Persson, Ulf Roland Brändström, John Berglind, Martin Hertsius
  • Patent number: 9022135
    Abstract: A torque applying system includes a torque applying tool having a motor and rotating output spindle, a torque sensor that measures an instantaneous torque exerted by the output spindle during a fastening cycle, and a controller operatively connected to the tool to control the tool's rotational speed during the fastening cycle. The controller is programmed to control the tool's rotational speed to be [(?F??C)/t]/r, wherein t is a time constant of speed control, ?F is a target final torque for the fastening cycle, and r is a torque rate.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: May 5, 2015
    Assignee: Stanley Black & Decker, Inc.
    Inventors: Zuher Naim Khalaf, William Lloyd Naumann
  • Patent number: 9016398
    Abstract: A power tool includes a motor having an output shaft that defines an axis, a drive train connected to the output shaft and operable to drive a tool output and a housing at least partially surrounding the motor and the drive train. The power tool further includes a reference disk fixed to the housing, a collar including internal teeth that engage at least a portion of the drive train and a torque transducer having a hub, a web and a rim. The torque transducer is positioned between the collar and the reference disk such that the rim is connected to the collar and the hub is connected to the reference disk. The web defines a first thickness measured parallel to the axis and the rim defines a second thickness measured in a radial direction with respect to the axis, such that the second thickness is greater than the first thickness.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: April 28, 2015
    Assignee: Ingersoll-Rand Company
    Inventors: John Paul Steckel, Daniel Jay Becker
  • Patent number: 8985237
    Abstract: A power screwdriver is disclosed, having a drive for driving a tool spindle having a controller for controlling the drive, having a monitoring device for monitoring the rotation speed or the torque, and having a monitoring device for monitoring a switch-off criterion, which monitoring device is coupled to the controller, in order to switch off the drive when the switch-off criterion is reached, with the controller being programmed such that (a) the drive is first of all accelerated until the rotation speed has reached a specific first rotation speed; (b) if the rotation speed then falls by at least a specific amount within a specific time increment, or the torque rises by at least a specific amount within a specific time increment, the drive is braked until the rotation speed has reached a specific second rotation speed, which is lower than the first rotation speed; (c) the drive is then regulated at the second rotation speed for a specific time; and (d) after step (c), the drive is accelerated again at most
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: March 24, 2015
    Assignee: C. & E. Fein GmbH
    Inventor: Michael Kaufmann
  • Patent number: 8931576
    Abstract: A power tool has a motor, a power supply unit, a trigger unit, a control unit, and a motor load detection unit. The power supply unit supplies power to the motor. The trigger unit causes the power supply unit to start applying a voltage to the motor. The control unit controls the power supply unit to increase the voltage to the motor at a constant increasing rate. The motor load detection unit detects a motor load. The control unit changes the constant increasing rate in accordance with the motor load.
    Type: Grant
    Filed: May 17, 2011
    Date of Patent: January 13, 2015
    Assignee: Hitachi Koki., Ltd.
    Inventor: Kazutaka Iwata
  • Publication number: 20140374131
    Abstract: A power tool has a continuously variable transmission, a condition detection device, and an operation control device. The continuously variable transmission changes a velocity of a rotational output from a drive motor and outputs the rotational output to a spindle to which a tip end tool is mounted. The condition detection device detects a condition of the power tool. The operation control device determines a target RPM of the spindle based on the condition of the power tool detected by the condition detection device, and controls an RPM of the drive motor and/or a transmission gear ratio of the continuously variable transmission based on the target RPM.
    Type: Application
    Filed: May 10, 2012
    Publication date: December 25, 2014
    Applicant: MAKITA CORPORATION
    Inventors: Shinji Hirabayashi, Tadasuke Matsuno
  • Patent number: 8894654
    Abstract: Disclosed is a medical driving device having a first motor coupled to a region of a first drive shaft; a second motor coupled to a second drive shaft; a coupler coupled to the second drive shaft and interchangeably connected to a working tool; a tool guide assembly comprising a tool guide surrounding the working tool and a surface guide having a distal region configured to couple to the tool guide and a proximal region configured to couple to the first motor, wherein the first motor causes axial motion of the tool guide assembly to a retracted state and drives a length of the working tool into a target region of a bone; a torque sensor configured to sense torque in at least the second motor by continuously measuring current used to drive the second motor; and programmable electronics package to keep RPMs constant. Related methods, systems, and/or articles are described.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: November 25, 2014
    Assignee: Smart Medical Devices, Inc.
    Inventor: Wayne Anderson
  • Publication number: 20140166326
    Abstract: An electric screwdriver includes a housing, a motor having a rotor and a maximum torque at constant speed of Cmax, and an end member. A transmission drives the end member and has a reduction gear coupled to the motor and having a ratio R and an efficiency ?. A torque sensor detects an attainment of a set value torque Cc. A motor driver drives the motor with a series of electric current impulses, The transmission enables an accumulation of kinetic energy Ec in the rotor and a restitution to the end member of the kinetic energy Ec between two impulses from the motor driver. The motor and reduction gear are configured such that: R*?*Cmax<Cc, the set value of torque Cc being attained through the transfer of kinetic energy Ec to the end member, wherein ratio R is smaller than or equal to 10/(?Cmax).
    Type: Application
    Filed: April 20, 2012
    Publication date: June 19, 2014
    Applicant: ETABLISSEMENT GEORGES RENAULT
    Inventors: Nicolas Le Du, Julien Tropee
  • Publication number: 20140102742
    Abstract: A power tool includes a housing, a motor, an output member driven by the motor, and a reaming attachment coupled to the output member. The reaming attachment has a front end portion selectively driven in rotation by the output member to drive a fastener into a workpiece, and a reaming portion selectively driven in rotation by the output member to remove material from an end surface of a conduit. A rotational motion sensor in the housing is operable to detect rotational motion of the housing about an axis. A controller receives a signal indicative of rotational motion from the sensor, determines a direction of the rotational motion of the housing, and drives the motor in a direction corresponding to the direction of rotational motion of the housing.
    Type: Application
    Filed: December 17, 2013
    Publication date: April 17, 2014
    Inventors: Scott J. ESHLEMAN, Craig A. SCHELL, Andrew J. SEMAN, JR., Daniel PUZIO, Danielle C. BROTTO, Joseph P. KELLEHER, Oleksiy P. SERGYEYENKO
  • Publication number: 20140102741
    Abstract: An impact rotation tool includes a drive source that generates power. An impact force generation unit generates impact force by changing the power generated by the drive source to pulsed torque. A shaft transmits the pulsed torque to the distal tool with the generated impact force. A torque detector generates a signal corresponding to the torque applied to the shaft. A determination unit determines whether or not a torque value obtained from a signal corresponding to the torque has reached a predetermined torque value. A control unit controls the drive source to a predetermined driving state when the determination unit determines that the torque value has reached the predetermined torque value. The determination unit is arranged on the shaft.
    Type: Application
    Filed: October 8, 2013
    Publication date: April 17, 2014
    Applicant: PANASONIC CORPORATION
    Inventors: Fumiaki SEKINO, Toshiharu OHASHI, Tadashi ARIMURA, Kenichirou INAGAKI
  • Patent number: 8689900
    Abstract: A rotary tool includes an externally operable operation switch; a motor serving as a power source; a power transfer block for transferring the rotation of the motor; a load detection unit for detecting an amount of load of the motor; and a control unit for controlling the motor. The control unit is configured to perform an operation control by which the motor is controlled so that a rotation speed of the motor is increased in proportion to the operation amount of the operation switch and a feedback control by which the rotation speed of the motor is controlled depending on the detection result of the load detection unit. The control unit inhibits the feedback control during the time when the operation amount of the operation switch is equal to or less than a threshold and performing the feedback control only when the operation amount of the operation switch is greater than the threshold.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: April 8, 2014
    Assignee: Panasonic Corporation
    Inventors: Tatsuya Miwa, Masaki Ikeda
  • Publication number: 20140090224
    Abstract: A torque applying system includes a torque applying tool having a motor and rotating output spindle, a torque sensor that measures an instantaneous torque exerted by the output spindle during a fastening cycle, and a controller operatively connected to the tool to control the tool's rotational speed during the fastening cycle. The controller is programmed to control the tool's rotational speed to be [(?F??C)/t]/r, wherein t is a time constant of speed control, ?F is a target final torque for the fastening cycle, and r is a torque rate.
    Type: Application
    Filed: October 2, 2012
    Publication date: April 3, 2014
    Inventors: Zuher Naim KHALAF, William Lloyd NAUMANN
  • Patent number: 8678106
    Abstract: A rotary impact tool includes: a hammer rotating by receiving a rotational force of a motor; an anvil rotating by receiving a rotational force of the hammer; and an end tool attached to the anvil, the rotary impact tool being constructed such that when a torque of a value not less than a predetermined value is applied to the anvil from the outside, the hammer is disengaged from the anvil to rotate idle and applies an impact to the anvil in a rotational direction after rotating idle by a predetermined angle, the rotary impact tool including an impact detector configured to detect impacts and a speed switching device configured to switch the rotational speed of the motor, and when the impact detector detects an impact during rotation of the anvil in a tightening direction, the speed switching device switches the rotational speed of the motor from a normal speed to a low speed.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: March 25, 2014
    Assignee: Makita Corporation
    Inventors: Yutaka Matsunaga, Hirokatsu Yamamoto, Katsuna Hayashi, Yoshitaka Ichikawa
  • Patent number: 8636079
    Abstract: A method of operating a rotary tool driven by a brushless motor including a DC brushless motor for rotationally driving a rotary bit, a torque setting clutch mechanism, a drive switch for drive-controlling a drive control circuit of the brushless motor, and a control means to rotationally drive the brushless motor by an operation of the drive switch and wherein the method includes a first step for stop-controlling of the drive control circuit, a second step for rotating forward or in reverse the brushless motor through the control and a third step for control-operating a semiconductor of an inverter circuit provided in the drive control circuit to short-circuit the magnetizing windings of the brushless motor, thus braking the rotor of the brushless motor and stopping the brushless motor.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: January 28, 2014
    Inventor: Katsuyuki Totsu
  • Patent number: 8607892
    Abstract: According to an aspect of the present invention, there is provided a rotary striking tool includes: a motor; an oil pulse unit that is driven by the motor; an output shaft that is coupled to the oil pulse unit so that a tip tool can be attached to the output shaft; a first detection unit that detects a rotation angle of the motor and outputs a first output signal; a second detection unit that detects an impact generated at the oil pulse unit and outputs a second output signal; and a control unit that controls a rotation of the motor, wherein the control unit uses a portion of the second output signal based on the first output signal for control of the rotation of the motor.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: December 17, 2013
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Yoshio Iimura, Kenro Ishimaru, Kazutaka Iwata, Nobuhiro Takano
  • Patent number: 8561715
    Abstract: A hand-operated rotary power tool and a method of operating the tool is disclosed. The tool has an electric motor for driving a rotary tool, a sensor device for detecting a blockade of the tool and a triggering device, which, in response to a blockade detected by the sensor device, reverses a direction of rotation of the electric motor prior to the blockade for a predetermined duration and immediately following induces the electric motor to again rotate in the direction of rotation.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: October 22, 2013
    Assignee: Hilti Aktiengesellschaft
    Inventors: Manuel Gut, Hoop Alexander, Michael Wierer, Dieter Profunser, Boeni Hans, Christof Freischlaeger
  • Publication number: 20130233584
    Abstract: A power tool includes a bit mounting unit, a motor, and a control unit. The bit mounting unit is configured to mount thereon a bit. The motor is configured to rotatingly drive the bit. The control unit is configured to control a drive of the motor. The control unit includes a storing unit configured to store a plurality of prescribed values affecting the drive of the motor and a division number by which a range of the plurality of prescribed values is divided. At least one of the range and the division number is arbitrarily settable.
    Type: Application
    Filed: January 28, 2013
    Publication date: September 12, 2013
    Applicant: HITACHI KOKI CO., LTD.
    Inventor: Hironori Mashiko
  • Patent number: 8505649
    Abstract: A power (1) tool including a driven member (15) that is operable to grip and drive at least one working element (4), drive means (25) operable to drive the driven member, the power tool being operable in either a working mode in which the driven member is driven to enable the working element to perform work, or an adjustment mode in which the driven member is adjusted to grip or release the working element, torque control means (7) controlling the torque produced by the drive means, the torque control means being operable to render the drive means inoperable when the torque exceeds a pre-determined level, the torque control means having an adjustment setting (17) which must be selected to enable the power tool to operate in an adjustment mode whereby the adjustment setting corresponds to a relatively low level of torque.
    Type: Grant
    Filed: April 26, 2006
    Date of Patent: August 13, 2013
    Assignee: Demain Technology Pty Ltd.
    Inventors: David Leigh Scrimshaw, Benjamin Luke Van der Linde, Paul Francis Connor
  • Publication number: 20130186659
    Abstract: An improved method is provided for operating a power tool. The method includes receiving an input control variable from an input unit; receiving at least one tool parameter relating to the power tool; determining a derivative of the input control variable; selecting one of a plurality of control profiles based on the control input variable, the derivative of the input control variable, and the tool parameter, each control profile correlating the control input variable of the input unit to a rotational speed at which to drive the output shaft; and driving the output shaft at a rotational speed in accordance with the selected control profile.
    Type: Application
    Filed: March 12, 2013
    Publication date: July 25, 2013
    Applicant: BLACK & DECKER INC.
    Inventor: BLACK & DECKER INC.
  • Publication number: 20130153252
    Abstract: An impact wrench which includes an air motor and a main shaft that is rotated by pulsed impact torque that is converted from rotary torque from the air motor to tighten a bolt, is provided with a torque sensor that detects a tightening torque on the bolt, and a controller that performs control functions to tighten the bolt, and the controller changes the rotational speed of the air motor to tighten up the bolt when the tightening torque that is detected by the torque sensor becomes equal to or higher than a prescribed value.
    Type: Application
    Filed: August 25, 2011
    Publication date: June 20, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Masahito Sakakibara
  • Patent number: 8353363
    Abstract: The invention is based on a device for handheld power tool for detecting a torque, having at least one sensor unit. It is proposed that the sensor unit is intended for detecting a deformation parameter. The sensor unit has at least one sensor element that is embodied as a strain gauge. A gearbox is provided which has a bearing location for receiving a deformation element of the sensor unit. An electronic unit evaluates detected data from the at least one sensor unit.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: January 15, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Daniel Hirt, Ursula Faber
  • Publication number: 20130000938
    Abstract: A hand-held power tool comprises a motor, an output section which is rotationally driven by the motor, and an output change section which changes the output of the output section in a stepless manner while normally driving the motor. The hand-held power tool is improved so that the output of the output section during working can be smoothly controlled.
    Type: Application
    Filed: October 22, 2010
    Publication date: January 3, 2013
    Applicant: MAKITA CORPORATION
    Inventors: Yutaka Matsunaga, Manabu Tokunaga, Shinji Hirabayashi
  • Publication number: 20120318552
    Abstract: In a pneumatic impact wrench there is an output shaft that is connectable in a removable manner to a screw coupling member; a torque sensor, which is mounted on the shaft, sends signals to a control unit that calculates the energy transferred through the output shaft and controls the wrench on the basis of a comparison between the calculated energy and a predefined threshold value.
    Type: Application
    Filed: June 18, 2012
    Publication date: December 20, 2012
    Applicant: DINO PAOLI S.R.L.
    Inventor: Lutz May
  • Publication number: 20120255756
    Abstract: Provided is a power tool which is capable of more reliably detecting excessive reaction torque acting on a tool body. More specifically, provided is a handheld power tool which causes a tip tool to rotate so as to carry out a predetermined machining operation, the handheld power tool comprising a tool body, a motor which is housed in the tool body and causes the tip tool to rotate, a first sensor which detects the torque state of the tip tool, a second sensor which detects the motion state of the tool body, and a torque cut-off mechanism which cuts off the transmission of torque between the motor and the tip tool. The torque cut-off mechanism is configured to cut off the transmission of torque on the condition that the first sensor and the second sensor respectively detect a preset threshold value for the first sensor and the second sensor.
    Type: Application
    Filed: October 20, 2010
    Publication date: October 11, 2012
    Applicant: MAKITA CORPORATION
    Inventor: Yonosuke Aoki
  • Publication number: 20120234569
    Abstract: 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 with a controller which can communicate with the tool, and to a display in communication with the tool and the controller. The controller can be programmed with operational information about a tool operation. Information related to the operational information is displayed to a user during use. Service information including at least information about an amount of force applied during use is recorded and stored in the controller. Also disclosed is a computerized system for controlled tool operation which sends operational instructions to the tool before use and retrieves service information from the tool after use.
    Type: Application
    Filed: November 14, 2011
    Publication date: September 20, 2012
    Inventors: Chris Lawton, Jie Li, De L. San, Nathan Lee
  • Patent number: 8261642
    Abstract: A power wrench includes a housing divided into two parts which are rotatable relative to each other: a first part including a handle and a transverse section lodging a rotation motor, and a second part including a reduction gearing, an output shaft and a rigidly attached and laterally extending reaction bar. A swivel connection is provided between the housing parts and includes an angle sensor arranged to generate signals in response to relative angular movements between the housing parts, and a power control unit communicates with the angle sensor and is arranged to at least substantially reduce the motor power as a pre-set maximum angular movement between the housing parts is exceeded as the motor is started.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: September 11, 2012
    Assignee: Atlas Copco Tools AB
    Inventors: Roland Ulf Brändström, Thomas Jan Hanspers, Mikael Erik Monsell
  • Publication number: 20120175142
    Abstract: The invention provides a transmission assembly and a power tool. One form of the power tool includes a rotatable driven member for releasably gripping and rotating a working element and a transmission assembly for transmitting rotation from a motor to the driven member. The transmission assembly includes a rotatable input shaft and first and second rotatable output shafts. In a first speed setting the input shaft is selectively lockable together with the first output shaft so that the locked input shaft and first output shaft rotate in unison to drive rotation of the driven member at a first speed of rotation relative to a speed of rotation of the motor. In a second speed setting the input shaft is selectively lockable to the second output shaft so that the locked input shaft and second output shaft rotate in unison to drive rotation of the driven member at a second speed of rotation relative to the speed of rotation of the motor.
    Type: Application
    Filed: July 15, 2010
    Publication date: July 12, 2012
    Applicant: DEMAIN TECHNOLOGY PTY LTD.
    Inventors: Benjamin L. Van Der Linde, Paul F. Connor
  • Publication number: 20110308827
    Abstract: A power screwdriver is disclosed, having a drive for driving a tool spindle having a controller for controlling the drive, having a monitoring device for monitoring the rotation speed or the torque, and having a monitoring device for monitoring a switch-off criterion, which monitoring device is coupled to the controller, in order to switch off the drive when the switch-off criterion is reached, with the controller being programmed such that (a) the drive is first of all accelerated until the rotation speed has reached a specific first rotation speed; (b) if the rotation speed then falls by at least a specific amount within a specific time increment, or the torque rises by at least a specific amount within a specific time increment, the drive is braked until the rotation speed has reached a specific second rotation speed, which is lower than the first rotation speed; (c) the drive is then regulated at the second rotation speed for a specific time; and (d) after step (c), the drive is accelerated again at most
    Type: Application
    Filed: June 17, 2011
    Publication date: December 22, 2011
    Inventor: Michael Kaufmann
  • Publication number: 20110303432
    Abstract: A power tool that includes a housing assembly, a motor received in the housing assembly, a trigger, an output spindle, a transmission and a bearing. The transmission is received in the housing assembly and transmits rotary power between the motor and the output spindle. The transmission has an output planetary stage with an output planet carrier. The transmission also has a member that is axially movable between a first position, which causes the transmission to operate in a first speed ratio, and a second position in which the transmission operates in a second speed ratio that is different than the first speed ratio. The bearing is disposed radially between and engages both the housing assembly and the output planet carrier. The output spindle is at least partially received into the output planet carrier such that the bearing indirectly supports the output spindle.
    Type: Application
    Filed: June 7, 2011
    Publication date: December 15, 2011
    Inventors: Joseph G. Stauffer, Aris C. Cleanthous, Sankarshan Murthy, John Zellinger, Qiang J. Zhang
  • Patent number: 8025106
    Abstract: Disclosed is a method for screwing in and tightening a screw connection (1) to a predetermined tightened level (2), especially a predetermined torque level (2) or a predetermined pretension level, with the aid of a hand-held screwing tool (3) comprising a regulated drive unit (4) and/or control functionality, particularly an electric nut runner (3). A tightening phase (B-C-D), during which the screw head rests against the supporting surface (6) of the screw connection (1), starts following a screwing phase (A). In order to improve said method, the speed (N) of the screwing tool (3) is increased to an output speed (7) for the tightening phase (B-C-D) within an acceleration time (8) in the tightening phase (B-C-D) and is lowered within a delay time (9) prior to or until reaching the predetermined tightened level (2).
    Type: Grant
    Filed: March 24, 2007
    Date of Patent: September 27, 2011
    Assignee: Robert Bosch GmbH
    Inventor: Heiko Schmidt
  • Publication number: 20110214894
    Abstract: According to an aspect of the invention, an oil pulse tool includes: a motor generating a driving force according to a driving voltage; an oil pulse unit driven by the driving force and generating a torque in a pulse-like shape when the motor passes a strike position on a shaft thereof; and an output shaft on which a front end tool is mounted, the output shaft being connected to the shaft, characterized in that the oil pulse tool further comprises driving adjusting means to control the driving voltage, the driving voltage is reduced during a given period including a timing when the torque is transmitted to the output shaft, and the reduced driving voltage is increased when the given period is finished.
    Type: Application
    Filed: May 8, 2009
    Publication date: September 8, 2011
    Applicant: Hitachi Koki Co., Ltd.
    Inventors: Tetsuhiro Harada, Tomomasa NIshikawa, Kazutaka Iwata, Shinki Ohtsu, Nobuhiro Takano
  • Publication number: 20110203819
    Abstract: A power tool includes a detecting member mounted in an output end of a housing, and a to-be-detected member mounted in a driver. When the driver is assembled with the output end of the housing, the detecting member will detect the to-be-detected member and transmit a signal to a torque adjustment unit disposed in the housing so as to enable the torque adjustment unit to automatically adjust the torque applied to the driver to reach a predetermined value, thereby preventing damage to the driver.
    Type: Application
    Filed: April 22, 2010
    Publication date: August 25, 2011
    Applicant: MOBILETRON ELECTRONICS CO., LTD.
    Inventors: Kim Y.C. Tsai, Cheng-I Teng, Chia-Chang Yeh
  • Patent number: 7987919
    Abstract: The invention relates to a discontinuous clamping wrench, of the type comprising a motor and a pulse clutch integrated in a casing, characterised in that it comprises measurement means of dynamic phenomena induced by said clamping on said casing, with a view to correlating said measurement with a clamping level.
    Type: Grant
    Filed: November 15, 2006
    Date of Patent: August 2, 2011
    Assignee: Etablissements Georges Renault
    Inventor: Norbert Paprocki
  • Publication number: 20110167651
    Abstract: A circular saw in which cutting speed of a saw blade is smoothly controlled. A speed change mechanism of a circular saw includes first and second rotating shafts disposed parallel to each other, and first and second gear trains having different gear ratios and each having a combination of a drive gear and a driven gear as one unit which are engaged with each other and transmit torque of the first rotating shaft to the second rotating shaft. A torque transmission path via the first gear train is defined as a first power transmission path and a torque transmission path via the second gear train is defined as a second power transmission path, and the transmission path is switched between the first power transmission path and the second power transmission path.
    Type: Application
    Filed: June 9, 2009
    Publication date: July 14, 2011
    Applicant: MAKITA CORPORATION
    Inventors: Manabu Tokunaga, Shinji Hirabayashi, Ryu Hashimoto
  • Patent number: 7900715
    Abstract: The present invention has disclosed a variable speed tool and a variable speed control method. The tool includes a switch; a gearbox housing; a motor; an outputting shaft; a multistage transmitting gear train and a gearshift ring which are mated with the motor and the outputting shaft, the gearshift ring having inner teeth; a gearshift fork mated with the gearshift ring; a tension spring arranged between the gearbox housing and the gearshift fork; and a torque sensing ring provided with a sliding groove in which the gearshift fork is movably disposed. When the load of the outputting shaft has reached to a predetermined value, the torque sensing ring makes the gearshift fork move axially in the sliding groove under the action of the tension spring, thus bringing the gearshift ring to move axially. The variable speed tool of the present invention may automatically adjust the rotating speed and the torque of the outputting shaft according to a variation of the load torque.
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: March 8, 2011
    Assignee: Positec Power Tools (Suzhou) Co., Ltd.
    Inventor: Chengzhong Chen
  • Patent number: 7882899
    Abstract: A power tool comprising a housing, a motor, an output shaft, a gear transmission mechanism and a control system. The gear transmission mechanism is connected between the motor and the output shaft to transmit the rotary power of the motor to the output shaft. The gear transmission mechanism has a high speed position and a low speed position. The control system is coupled to the gear transmission mechanism for detecting an operating characteristic of the power tool to actuate a ring gear to automatically move from the high speed position to the low speed position and to reduce the rotational speed of the ring gear when the operating characteristic exceeding a predetermined value.
    Type: Grant
    Filed: August 26, 2008
    Date of Patent: February 8, 2011
    Assignee: Positec Power Tools (Suzhou) Co., Ltd
    Inventors: Gianni Borinato, Kelvin Wong, Shisong Zhang, Paolo Andriolo, Warren Brown, Hongfeng Zhong, Fangshi Liu, Chengzhong Chen
  • Publication number: 20110000688
    Abstract: Tightening torque is appropriately managed by a simple means. An electric rotating tool (40) has a brushless DC motor (2), an inverter circuit part (3), and a control circuit part (4). The control circuit part (4) has a current detecting circuit (18), which detects a motor current I, a rotation number detecting circuit (17), which detects the number of rotations of the motor (N), and a computing part (19), which calculates first tightening torque (T1) based on the detection information of the motor current (I) and calculates second tightening torque (T2) based on the number of rotations of the motor (N). The computing part (19) estimates tightening torque Tave based on the estimate value of the first tightening torque (T1) or the second tightening torque (T2). The computing part (19) stops driving the motor (2) when the estimated tightening torque Tave exceeds a set value Tset.
    Type: Application
    Filed: February 16, 2009
    Publication date: January 6, 2011
    Inventor: Kazutaka Iwata
  • Patent number: 7795829
    Abstract: In an electric power tool and a method for operating an electric power tool, a torque limitation of an electric motor reacts when a load moment exceeds a predetermined threshold and in which an output request is carried out by means of a switch. A supply of current to the motor is interrupted when a criterion for the reaction of the torque limitation is detected based on a speed detection of the motor.
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: September 14, 2010
    Assignee: Robert Bosch GmbH
    Inventors: Hartmut Seiler, Dirk Lamprecht
  • Patent number: 7770658
    Abstract: An object is to improve accuracy of tightening torque and to shorten time necessary for fastening a screw in an impact type screw fastening device that uses an electric motor as a rotation driving source. A control method for the impact type screw fastening device that uses an electric motor as a rotation driving source includes the steps of driving the motor to rotate by supplying current to the motor intermittently so that torque exerted on a load by rotation of the motor becomes like pulses on the time axis, and controlling the current of every time of each pulse so that an increment of every time of each pulse of the torque after the torque reaches a target approach torque TQN that is a first set value becomes smaller than that before it reaches the target approach torque TQN.
    Type: Grant
    Filed: May 10, 2006
    Date of Patent: August 10, 2010
    Assignees: Estic Corporation, Honda Motor Co., Ltd.
    Inventors: Takaya Ito, Yoshitsugu Shibata, Hitoshi Takamura
  • Publication number: 20100147545
    Abstract: The invention is based on a device for handheld power tool for detecting a torque, having at least one sensor unit. It is proposed that the sensor unit is intended for detecting a deformation parameter. The sensor unit has at least one sensor element that is embodied as a strain gauge. A gearbox is provided which has a bearing location for receiving a deformation element of the sensor unit. An electronic unit evaluates detected data from the at least one sensor unit.
    Type: Application
    Filed: December 11, 2009
    Publication date: June 17, 2010
    Inventors: Daniel HIRT, Ursula Faber