Patents by Inventor Katsuna Hayashi

Katsuna Hayashi 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: 11213933
    Abstract: An electric working machine in one aspect of the present disclosure includes: a motor; a controller for controlling driving of the motor; a first setter; and a second setter. The first setter is operated for setting, as a control method for the motor, which is usable by the controller, one of control methods preliminarily registered. The second setter is operated for setting, as a control method for the motor, which is usable by the controller, at least one of the control methods settable via the first setter.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: January 4, 2022
    Assignee: MAKITA CORPORATION
    Inventors: Itsuku Kato, Akira Tomonaga, Katsuna Hayashi, Tokuo Hirabayashi, Tomoyuki Kondo
  • Patent number: 11161227
    Abstract: An electric working machine in one aspect of the present disclosure includes: a motor, a manipulator, a setter, and a controller. The setter sets first control characteristics preliminarily registered. The first control characteristics are set to achieve a rotational speed of the motor from a minimum rotational speed to a maximum rotational speed with a manipulating range of the manipulator, which is 50% or less of an effective manipulating range thereof.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: November 2, 2021
    Assignee: MAKITA CORPORATION
    Inventors: Itsuku Kato, Akira Tomonaga, Katsuna Hayashi, Tokuo Hirabayashi, Tomoyuki Kondo
  • 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
  • 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: 20190111551
    Abstract: An electric working machine in one aspect of the present disclosure includes: a motor, a manipulator, a setter, and a controller. The setter sets first control characteristics preliminarily registered. The first control characteristics are set to achieve a rotational speed of the motor from a minimum rotational speed to a maximum rotational speed with a manipulating range of the manipulator, which is 50% or less of an effective manipulating range thereof.
    Type: Application
    Filed: October 11, 2018
    Publication date: April 18, 2019
    Applicant: MAKITA CORPORATION
    Inventors: Itsuku KATO, Akira TOMONAGA, Katsuna HAYASHI, Tokuo HIRABAYASHI, Tomoyuki KONDO
  • Publication number: 20190111550
    Abstract: An electric working machine in one aspect of the present disclosure includes: a motor; a controller for controlling driving of the motor; a first setter; and a second setter. The first setter is operated for setting, as a control method for the motor, which is usable by the controller, one of control methods preliminarily registered. The second setter is operated for setting, as a control method for the motor, which is usable by the controller, at least one of the control methods settable via the first setter.
    Type: Application
    Filed: October 11, 2018
    Publication date: April 18, 2019
    Applicant: MAKITA CORPORATION
    Inventors: Itsuku KATO, Akira TOMONAGA, Katsuna HAYASHI, Tokuo HIRABAYASHI, Tomoyuki KONDO
  • Patent number: 10148213
    Abstract: An electronic power equipment, which is configured to be connected to both an AC power source and a DC power source, has a motor 14 configured to be driven by both AC power and DC power, an AC circuit 30 for supplying AC electric power to the motor 14, a DC circuit 40 for supplying DC electric power to the motor 14, switching parts RL1-RL12 for switching between the AC circuit 30 and the DC circuit 40 wherein the AC and DC circuits are insulated relative to each other, and a controller A1 configured to control the switching parts RL1-RL12, the AC circuit 30, and the DC circuit 40.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: December 4, 2018
    Assignee: MAKITA CORPORATION
    Inventors: Takuya Kusakawa, Katsuna Hayashi
  • 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: 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: 20170040919
    Abstract: An electronic power equipment, which is configured to be connected to both an AC power source and a DC power source, has a motor 14 configured to be driven by both AC power and DC power, an AC circuit 30 for supplying AC electric power to the motor 14, a DC circuit 40 for supplying DC electric power to the motor 14, switching parts RL1-RL12 for switching between the AC circuit 30 and the DC circuit 40 wherein the AC and DC circuits are insulated relative to each other, and a controller A1 configured to control the switching parts RL1-RL12, the AC circuit 30, and the DC circuit 40.
    Type: Application
    Filed: July 29, 2016
    Publication date: February 9, 2017
    Applicant: MAKITA CORPORATION
    Inventors: Takuya KUSAKAWA, Katsuna HAYASHI
  • Patent number: 9510504
    Abstract: A work machine includes an operation rod, a front unit disposed at a front end of the operation rod and configured to attach a tool, a rear unit disposed at a rear end of the operation rod and configured to attach a battery, a brushless motor disposed in the front unit and configured to drive the tool, a motor controller disposed in the rear unit and electrically coupled with the battery, and a plurality of motor power lines disposed along the operation rod and configured to electrically couple the motor controller with the brushless motor.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: December 6, 2016
    Assignee: MAKITA CORPORATION
    Inventors: Yoshifumi Morita, Katsuna Hayashi
  • Patent number: 9474204
    Abstract: A work machine includes an operation rod, a front unit disposed at a front end of the operation rod and configured to attach a tool, a rear unit disposed at a rear end of the operation rod and configured to attach a battery, a brushless motor disposed in the front unit and configured to drive the tool, a motor controller disposed in the rear unit and electrically coupled with the battery, and a plurality of motor power lines disposed along the operation rod and configured to electrically couple the motor controller with the brushless motor.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: October 25, 2016
    Assignee: MAKITA CORPORATION
    Inventors: Yoshifumi Morita, Katsuna Hayashi
  • Publication number: 20140165412
    Abstract: A work machine includes an operation rod, a front unit disposed at a front end of the operation rod and configured to attach a tool, a rear unit disposed at a rear end of the operation rod and configured to attach a battery, a brushless motor disposed in the front unit and configured to drive the tool, a motor controller disposed in the rear unit and electrically coupled with the battery, and a plurality of motor power lines disposed along the operation rod and configured to electrically couple the motor controller with the brushless motor.
    Type: Application
    Filed: December 6, 2013
    Publication date: June 19, 2014
    Applicant: MAKITA CORPORATION
    Inventors: Yoshifumi MORITA, Katsuna HAYASHI
  • 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
  • Publication number: 20130277081
    Abstract: A rechargeable electric power tool includes a battery pack that is detachably provided on a housing accommodating a motor and that supplies electric power to the motor, and a tool that is driven by the motor. A standby switch and a lock-on switch are arranged at the housing. The standby switch is able to set the rechargeable electric power tool to a standby state where the rechargeable electric power tool waits for the motor to be driven. The lock-on switch is able to shift the rechargeable electric power tool from the standby state to a state where the motor is driven so as to keep the state where the motor is driven.
    Type: Application
    Filed: March 11, 2013
    Publication date: October 24, 2013
    Applicant: MAKITA CORPORATION
    Inventors: Masanori HAYASHI, Masahiro WATANABE, Katsuna HAYASHI, Motohiro OMURA, Toshiyuki KANI
  • Patent number: 8469115
    Abstract: In a speed change device of an electrical power tool, a reset arm is provided separately from a switch lever, which arm is operated by a reset motor. Due to tilting motion of the reset arm, a lock ring can be returned to an unlocking position in which a second stage internal gear can be rotated, so that the speed change device can be rest to a high speed low torque mode.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: June 25, 2013
    Assignee: Makita Corporation
    Inventors: Tomoyuki Kondo, Yoshitaka Ichikawa, Katsuna Hayashi
  • Publication number: 20110315417
    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 detection means detecting impacts and a speed switching means switching the rotational speed of the motor, and when the impact detection means detects an impact during rotation of the anvil in a tightening direction, the speed switching means switches the rotational speed of the motor from a normal speed to a low speed.
    Type: Application
    Filed: January 14, 2010
    Publication date: December 29, 2011
    Applicant: MAKITA CORPORATION
    Inventors: Yutaka Matsunaga, Hirokatsu Yamamoto, Katsuna Hayashi, Yoshitaka Ichikawa
  • Publication number: 20110232933
    Abstract: In a speed change device of an electrical power tool, a reset arm is provided separately from a switch lever, which arm is operated by a reset motor. Due to tilting motion of the reset arm, a lock ring can be returned to an unlocking position in which a second stage internal gear can be rotated, so that the speed change device can be rest to a high speed low torque mode.
    Type: Application
    Filed: October 2, 2009
    Publication date: September 29, 2011
    Applicant: MAKITA CORPORATION
    Inventors: Tomoyuki Kondo, Yoshitaka Ichikawa, Katsuna Hayashi