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).
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Patent number: 11213933Abstract: 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: GrantFiled: October 11, 2018Date of Patent: January 4, 2022Assignee: MAKITA CORPORATIONInventors: Itsuku Kato, Akira Tomonaga, Katsuna Hayashi, Tokuo Hirabayashi, Tomoyuki Kondo
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Patent number: 11161227Abstract: 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: GrantFiled: October 11, 2018Date of Patent: November 2, 2021Assignee: MAKITA CORPORATIONInventors: Itsuku Kato, Akira Tomonaga, Katsuna Hayashi, Tokuo Hirabayashi, Tomoyuki Kondo
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Patent number: 10731812Abstract: 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: GrantFiled: January 22, 2018Date of Patent: August 4, 2020Assignee: MAKITA CORPORATIONInventors: Tomonobu Nashimoto, Tetsuya Kiuchi, Katsuna Hayashi, Kouichi Takeda
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Patent number: 10720863Abstract: 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: GrantFiled: April 10, 2019Date of Patent: July 21, 2020Assignee: MAKITA CORPORATIONInventors: Itsuku Kato, Katsuna Hayashi, Kouichi Takeda, Hidenori Nagasaka, Takeshi Kamiya
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Publication number: 20190319563Abstract: 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: ApplicationFiled: April 10, 2019Publication date: October 17, 2019Inventors: Itsuku KATO, Katsuna HAYASHI, Kouichi TAKEDA, Hidenori NAGASAKA, Takeshi KAMIYA
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Publication number: 20190111551Abstract: 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: ApplicationFiled: October 11, 2018Publication date: April 18, 2019Applicant: MAKITA CORPORATIONInventors: Itsuku KATO, Akira TOMONAGA, Katsuna HAYASHI, Tokuo HIRABAYASHI, Tomoyuki KONDO
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Publication number: 20190111550Abstract: 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: ApplicationFiled: October 11, 2018Publication date: April 18, 2019Applicant: MAKITA CORPORATIONInventors: Itsuku KATO, Akira TOMONAGA, Katsuna HAYASHI, Tokuo HIRABAYASHI, Tomoyuki KONDO
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Patent number: 10148213Abstract: 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: GrantFiled: July 29, 2016Date of Patent: December 4, 2018Assignee: MAKITA CORPORATIONInventors: Takuya Kusakawa, Katsuna Hayashi
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Publication number: 20180216793Abstract: 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: ApplicationFiled: January 22, 2018Publication date: August 2, 2018Applicant: MAKITA CORPORATIONInventors: Tomonobu NASHIMOTO, Tetsuya KIUCHI, Katsuna HAYASHI, Kouichi TAKEDA
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Publication number: 20180215404Abstract: 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: ApplicationFiled: December 27, 2017Publication date: August 2, 2018Applicant: MAKITA CORPORATIONInventors: Katsuna HAYASHI, Kouichi TAKEDA
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Publication number: 20170040919Abstract: 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: ApplicationFiled: July 29, 2016Publication date: February 9, 2017Applicant: MAKITA CORPORATIONInventors: Takuya KUSAKAWA, Katsuna HAYASHI
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Patent number: 9510504Abstract: 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: GrantFiled: December 6, 2013Date of Patent: December 6, 2016Assignee: MAKITA CORPORATIONInventors: Yoshifumi Morita, Katsuna Hayashi
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Patent number: 9474204Abstract: 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: GrantFiled: December 6, 2013Date of Patent: October 25, 2016Assignee: MAKITA CORPORATIONInventors: Yoshifumi Morita, Katsuna Hayashi
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Publication number: 20140165412Abstract: 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: ApplicationFiled: December 6, 2013Publication date: June 19, 2014Applicant: MAKITA CORPORATIONInventors: Yoshifumi MORITA, Katsuna HAYASHI
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Patent number: 8678106Abstract: 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: GrantFiled: January 14, 2010Date of Patent: March 25, 2014Assignee: Makita CorporationInventors: Yutaka Matsunaga, Hirokatsu Yamamoto, Katsuna Hayashi, Yoshitaka Ichikawa
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Publication number: 20130277081Abstract: 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: ApplicationFiled: March 11, 2013Publication date: October 24, 2013Applicant: MAKITA CORPORATIONInventors: Masanori HAYASHI, Masahiro WATANABE, Katsuna HAYASHI, Motohiro OMURA, Toshiyuki KANI
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Patent number: 8469115Abstract: 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: GrantFiled: October 2, 2009Date of Patent: June 25, 2013Assignee: Makita CorporationInventors: Tomoyuki Kondo, Yoshitaka Ichikawa, Katsuna Hayashi
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Publication number: 20110315417Abstract: 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: ApplicationFiled: January 14, 2010Publication date: December 29, 2011Applicant: MAKITA CORPORATIONInventors: Yutaka Matsunaga, Hirokatsu Yamamoto, Katsuna Hayashi, Yoshitaka Ichikawa
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Publication number: 20110232933Abstract: 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: ApplicationFiled: October 2, 2009Publication date: September 29, 2011Applicant: MAKITA CORPORATIONInventors: Tomoyuki Kondo, Yoshitaka Ichikawa, Katsuna Hayashi