Patents by Inventor Kouichi Takeda

Kouichi Takeda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11785898
    Abstract: An electric working machine may include a control device configured to control an electric unit, an operation member, a first switch configured to be operated by the operation member, and a second switch configured to be operated by the operation member. The operation member may pass a second position and a third position while the operation member moves to the first position. The first switch may be configured to transmit a first signal which changes as the operation member moves from the second position to the first position to the control device when the operation member moves between the second position and the first position. The second switch may be configured to transmit a second signal to the control device when the operation member passes the third position. The control device may be configured to control the electric unit based on the first signal and the second signal.
    Type: Grant
    Filed: September 9, 2021
    Date of Patent: October 17, 2023
    Assignee: MAKITA CORPORATION
    Inventors: Daisuke Suzuki, Kouichi Takeda
  • Publication number: 20230294523
    Abstract: A battery-powered dolly in one aspect of the present disclosure includes a handle, a connector, a motor, a wheel, a detector, a rotation information acquirer and a controller. The controller stops supplying an electric power from a battery to the motor based on (i) a battery current value and/or a battery voltage value detected by the detector and (ii) a rotation information acquired by the rotation information acquirer.
    Type: Application
    Filed: March 13, 2023
    Publication date: September 21, 2023
    Applicant: MAKITA CORPORATION
    Inventor: Kouichi TAKEDA
  • Publication number: 20230065201
    Abstract: An electric work machine in one aspect of the present disclosure includes an output shaft, a brushless DC motor, a first positive-side conduction path, a first negative-side conduction path, a first switch device, a manual switch, a rotation sensor, and a controller. The first switch device is on the first positive-side conduction path or the first negative-side conduction path. The controller controls a magnitude of a conduction angle based on an actual rotational frequency and a target rotational frequency of the brushless DC motor.
    Type: Application
    Filed: August 22, 2022
    Publication date: March 2, 2023
    Applicant: MAKITA CORPORATION
    Inventor: Kouichi TAKEDA
  • Publication number: 20220407397
    Abstract: One aspect of the present disclosure provides a battery-powered wheelbarrow including a battery housing, a motor, a wheel, a drive circuit, and a control circuit. The control circuit activates, during a drive requirement of the motor not being satisfied, dynamic braking. The control circuit decreases the dynamic braking through the drive circuit in accordance with a lapse of time in response to a first transition having occurred or occurring.
    Type: Application
    Filed: June 14, 2022
    Publication date: December 22, 2022
    Applicant: MAKITA CORPORATION
    Inventor: Kouichi TAKEDA
  • Publication number: 20220071109
    Abstract: An electric working machine may include a control device configured to control an electric unit, an operation member, a first switch configured to be operated by the operation member, and a second switch configured to be operated by the operation member. The operation member may pass a second position and a third position while the operation member moves to the first position. The first switch may be configured to transmit a first signal which changes as the operation member moves from the second position to the first position to the control device when the operation member moves between the second position and the first position. The second switch may be configured to transmit a second signal to the control device when the operation member passes the third position. The control device may be configured to control the electric unit based on the first signal and the second signal.
    Type: Application
    Filed: September 9, 2021
    Publication date: March 10, 2022
    Applicant: Makita Corporation
    Inventors: Daisuke SUZUKI, Kouichi TAKEDA
  • Patent number: 11039570
    Abstract: A working machine according to one aspect of the present disclosure comprises an operating device, a working tool, a driving device, a braking device, a detection device, and a change device. The detection device detects a mode of an operation performed on the operating device. The change device changes a brake control to be performed by the braking device according to the mode detected by the detection device.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: June 22, 2021
    Assignee: MAKITA CORPORATION
    Inventors: Yuji Takahashi, Kouichi Takeda
  • Patent number: 10749356
    Abstract: An electric work machine (2) includes a motor (M) and a control unit (36) that controls rotation of the motor. The control unit (36) is configured such that an operating mode is switchable between a normal mode, in which the motor is rotated within a prescribed output range, and a power mode, in which the motor is rotatable with energy greater than in the normal mode. Furthermore, the control unit (36) is configured to restrict use of the power mode.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: August 18, 2020
    Assignee: MAKITA CORPORATION
    Inventors: Kouichi Takeda, Takuya Kusakawa
  • Patent number: 10731812
    Abstract: A push cart according to one aspect of the present disclosure includes a wheel, a body frame, and a lighting device. The body frame includes a handle portion and rotatably supports the wheel. The body frame is configured to be able to mount a loading platform on the body frame. The handle portion is gripped by a user of the push cart. The lighting device emits light.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: August 4, 2020
    Assignee: MAKITA CORPORATION
    Inventors: Tomonobu Nashimoto, Tetsuya Kiuchi, Katsuna Hayashi, Kouichi Takeda
  • Patent number: 10720863
    Abstract: An electric power tool may include a three-phase brushless motor configured to drive a tool, a gear reducer provided between the motor and the tool. The gear reducer is configured to selectively change a reduction ratio from the motor to the tool between a first reduction ratio and a second reduction ratio. The electric power tool may further include a motor controller configured to drive the motor with rectangular waves. The motor controller is configured to selectively change a conduction angle of each rectangular wave between at least a first conduction angle and a second conduction angle.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: July 21, 2020
    Assignee: MAKITA CORPORATION
    Inventors: Itsuku Kato, Katsuna Hayashi, Kouichi Takeda, Hidenori Nagasaka, Takeshi Kamiya
  • Patent number: 10576971
    Abstract: A push cart includes a wheel, a motor, an obstacle detector, and a controller. The motor is configured to generate a rotational force that rotates the wheel. The obstacle detector is configured to detect an obstacle. The controller is configured to execute, in response to detection of the obstacle by the obstacle detector, avoidance control to control driving of the motor such that a movement of the push cart is limited. The controller is configured to disable execution of the avoidance control in response to a determination that a specified disabling condition is satisfied.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: March 3, 2020
    Assignee: MAKITA CORPORATION
    Inventors: Kouichi Takeda, Itsuku Kato, Jiro Suzuki
  • Patent number: 10461674
    Abstract: An electric working machine according to one aspect of the present disclosure comprises a motor, a speed setting unit, a load detection unit, a determination unit, and a parameter setting unit. The determination unit calculates an estimated value of a heat generation amount of the motor, and determines that the motor is in an overload operation state when the estimated value reaches a predetermined threshold. The parameter setting unit sets a parameter to be used for calculating the estimated value and/or the threshold in accordance with a rotation speed set by the speed setting unit.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: October 29, 2019
    Assignee: MAKITA CORPORATION
    Inventors: Michisada Yabuguchi, Kouichi Takeda, Masumi Nishimura, Hiroshi Nojiri
  • Publication number: 20190319563
    Abstract: An electric power tool may include a three-phase brushless motor configured to drive a tool, a gear reducer provided between the motor and the tool. The gear reducer is configured to selectively change a reduction ratio from the motor to the tool between a first reduction ratio and a second reduction ratio. The electric power tool may further include a motor controller configured to drive the motor with rectangular waves. The motor controller is configured to selectively change a conduction angle of each rectangular wave between at least a first conduction angle and a second conduction angle.
    Type: Application
    Filed: April 10, 2019
    Publication date: October 17, 2019
    Inventors: Itsuku KATO, Katsuna HAYASHI, Kouichi TAKEDA, Hidenori NAGASAKA, Takeshi KAMIYA
  • Publication number: 20190115772
    Abstract: An electric work machine (2) includes a motor (M) and a control unit (36) that controls rotation of the motor. The control unit (36) is configured such that an operating mode is switchable between a normal mode, in which the motor is rotated within a prescribed output range, and a power mode, in which the motor is rotatable with energy greater than in the normal mode. Furthermore, the control unit (36) is configured to restrict use of the power mode.
    Type: Application
    Filed: October 16, 2018
    Publication date: April 18, 2019
    Inventors: Kouichi TAKEDA, Takuya KUSAKAWA
  • Publication number: 20190023265
    Abstract: A push cart includes a wheel, a motor, an obstacle detector, and a controller. The motor is configured to generate a rotational force that rotates the wheel. The obstacle detector is configured to detect an obstacle. The controller is configured to execute, in response to detection of the obstacle by the obstacle detector, avoidance control to control driving of the motor such that a movement of the push cart is limited. The controller is configured to disable execution of the avoidance control in response to a determination that a specified disabling condition is satisfied.
    Type: Application
    Filed: June 29, 2018
    Publication date: January 24, 2019
    Applicant: MAKITA CORPORATION
    Inventors: Kouichi TAKEDA, Itsuku KATO, Jiro SUZUKI
  • Publication number: 20180215404
    Abstract: An electric push cart includes a motor; a drive wheel that is rotationally driven by the motor; a cart frame that rotatably supports the drive wheel and includes left and right handles for a user to hold; a controller that drives the motor and issues a warning. The controller issues a warning when a motor-stop condition is fulfilled as a result of an increase in load on the motor when driving the motor and stops the drive of the motor after a given time has elapsed.
    Type: Application
    Filed: December 27, 2017
    Publication date: August 2, 2018
    Applicant: MAKITA CORPORATION
    Inventors: Katsuna HAYASHI, Kouichi TAKEDA
  • Publication number: 20180216793
    Abstract: A push cart according to one aspect of the present disclosure includes a wheel, a body frame, and a lighting device. The body frame includes a handle portion and rotatably supports the wheel. The body frame is configured to be able to mount a loading platform on the body frame. The handle portion is gripped by a user of the push cart. The lighting device emits light.
    Type: Application
    Filed: January 22, 2018
    Publication date: August 2, 2018
    Applicant: MAKITA CORPORATION
    Inventors: Tomonobu NASHIMOTO, Tetsuya KIUCHI, Katsuna HAYASHI, Kouichi TAKEDA
  • Publication number: 20180152125
    Abstract: An electric working machine includes a detector configured to detect a specified rotation position of a brushless motor based on an induced voltage, and a controller configured to control current conduction to the brushless motor by setting a commutation timing in response to a detection of the specified rotation position by the detector. The controller disables setting of the commutation timing based on the specified rotation position detected by the detector during a specified mask time from the commutation timing and increases the mask time as a load of the brushless motor is larger.
    Type: Application
    Filed: November 21, 2017
    Publication date: May 31, 2018
    Applicant: MAKITA CORPORATION
    Inventor: Kouichi TAKEDA
  • Publication number: 20180092297
    Abstract: A working machine according to one aspect of the present disclosure includes a main body portion, a driving device, a working tool, a grip portion and a determiner. The grip portion is attached to the main body portion and configured to be held by a user of the working machine. The determiner is configured to determine an abnormal state of the working machine when a couple moment received by the user through the grip portion exceeds a couple threshold. The couple threshold is 200 N·m per 50 ms.
    Type: Application
    Filed: October 4, 2017
    Publication date: April 5, 2018
    Applicant: MAKITA CORPORATION
    Inventors: Ryo SUNAZUKA, Yuji TAKAHASHI, Hirokatsu YAMAMOTO, Kouichi TAKEDA, Shinya KOJIMA
  • Publication number: 20180092298
    Abstract: A working machine according to one aspect of the present disclosure comprises an operating device, a working tool, a driving device, a braking device, a detection device, and a change device. The detection device detects a mode of an operation performed on the operating device. The change device changes a brake control to be performed by the braking device according to the mode detected by the detection device.
    Type: Application
    Filed: October 4, 2017
    Publication date: April 5, 2018
    Applicant: MAKITA CORPORATION
    Inventors: Yuji TAKAHASHI, Kouichi TAKEDA
  • Publication number: 20180048252
    Abstract: An electric working machine according to one aspect of the present disclosure comprises a motor, a speed setting unit, a load detection unit, a determination unit, and a parameter setting unit. The determination unit calculates an estimated value of a heat generation amount of the motor, and determines that the motor is in an overload operation state when the estimated value reaches a predetermined threshold. The parameter setting unit sets a parameter to be used for calculating the estimated value and/or the threshold in accordance with a rotation speed set by the speed setting unit.
    Type: Application
    Filed: August 7, 2017
    Publication date: February 15, 2018
    Applicant: MAKITA CORPORATION
    Inventors: Michisada YABUGUCHI, Kouichi TAKEDA, Masumi NISHIMURA, Hiroshi NOJIRI