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公开(公告)号：US20210106194A1
公开(公告)日：2021-04-15
申请号：US17130964
申请日：2020-12-22
Applicant: MAKITA CORPORATION
Inventor： Hitoshi SUZUKI , Yuki KAWAI , Itsuku KATO , Yasutaka HOTTA
Abstract: An interlocking adapter in one aspect of the present disclosure includes a current path, an electric load, a switch, and a controller. The controller turns on and off the switch in synchronization with a change of an alternating-current voltage received from an electric outlet of an electric apparatus in response to reception of an interlocking command signal from a working machine so as to supply a load current from the electric outlet to the electric load. The controller turns on and off the switch at a specified ratio of a time every 1/2 cycle of the alternating-current voltage.
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12.发明申请公开(公告)号：US20190207339A1
公开(公告)日：2019-07-04
申请号：US16232827
申请日：2018-12-26
Applicant: MAKITA CORPORATION
Inventor： Hitoshi SUZUKI , Yuki KAWAI , Itsuku KATO , Yasutaka HOTTA
IPC: H01R13/428 , A47L7/00 , A47L9/28 , B23D47/04
CPC classification number: A47L7/0095 , A47L9/2868 , B23Q11/0046 , B25F5/00
Abstract: An interlocking adapter in one aspect of the present disclosure includes a current path, an electric load, a switch, and a controller. The controller turns on and off the switch in synchronization with a change of an alternating-current voltage received from an electric outlet of an electric apparatus in response to reception of an interlocking command signal from a working machine so as to supply a load current from the electric outlet to the electric load. The controller turns on and off the switch at a specified ratio of a time every ½ cycle of the alternating-current voltage.
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公开(公告)号：US20190111550A1
公开(公告)日：2019-04-18
申请号：US16157475
申请日：2018-10-11
Applicant: MAKITA CORPORATION
Inventor： Itsuku KATO , Akira TOMONAGA , Katsuna HAYASHI , Tokuo HIRABAYASHI , Tomoyuki KONDO
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.
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公开(公告)号：US20170217004A1
公开(公告)日：2017-08-03
申请号：US15422036
申请日：2017-02-01
Applicant: MAKITA CORPORATION
Inventor： Itsuku KATO
IPC: B25C5/15
CPC classification number: B25C5/15
Abstract: A fastener driving tool is provided with a plunger, an impact spring, a motor, a drive mechanism, a motor drive control unit, a position detection unit, and a timer unit. The drive mechanism moves the plunger from a stop position to top dead center by rotation of the motor. The impact spring moves the plunger in a driving direction. The position detection unit detects that the plunger has reached a predetermined position by the rotation of the motor, and the timer unit measures time therebetween. The motor drive control unit, after power supply to the motor is cut off, performs a stop control for stopping the motor at the predetermined stop position based on the time measured by the timer unit.
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公开(公告)号：US20230144684A1
公开(公告)日：2023-05-11
申请号：US17982649
申请日：2022-11-08
Applicant: MAKITA CORPORATION
Inventor： Itsuku KATO
IPC: B25B23/147
CPC classification number: B25B23/147
Abstract: The electric work machine in one aspect of the present disclosure includes an output shaft, a motor, a current measuring circuit, and a controller. The current measuring circuit measures a current value, the current value corresponding to a magnitude of a drive current flowing through the motor. The controller sets a maximum value and a threshold. The controller calculates the correction value less than or equal to the maximum value so that the drive current decreases, in response to the current value having reached the threshold. The controller subtracts, from the control parameter, the correction value calculated, thereby correcting the control parameter. The controller drives the motor based on the control parameter corrected.
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Patent Agency Ranking
公开(公告)号：US20210094158A1
公开(公告)日：2021-04-01
申请号：US17026390
申请日：2020-09-21
Applicant: MAKITA CORPORATION
Inventor： Itsuku KATO , Yasuhito KAWAI
IPC: B25B21/02 , B25B23/147
Abstract: An electric power tool in one aspect of the present disclosure includes a motor, an impact mechanism, and a control circuit. The control circuit executes a motor control process. The motor control process includes limiting an output of the motor in response to establishment of a preset condition. The preset condition is based on a load applied to the motor.
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公开(公告)号：US20210069886A1
公开(公告)日：2021-03-11
申请号：US17014012
申请日：2020-09-08
Applicant: MAKITA CORPORATION
Inventor： Hitoshi SUZUKI , Seitaro HAYASHI , Motohiro OMURA , Itsuku KATO
IPC: B25F5/00 , H02H7/097 , H02P29/028
Abstract: An electric work machine (1; 110; 120; 130), such as a power tool, includes a motor (11) having a rotor, a drive part (13) that supplies electric currents to drive the motor, a rotational-direction selection part (17), and a motor-control part (14; 31, 32, 40, 50, 60; 14, 40, 60, 73, 80; 14, 60, 91). The rotational-direction selection part is configured for manually setting (selecting) the rotational direction of the rotor and outputs first and second setting signals that each indicate the set (selected) rotational direction. The motor-control part controls the drive part such that the rotor rotates in the rotational direction indicated by the first setting signal and/or the second setting signal. In response to a determination that the rotational directions indicated by the first and second setting signals are inconsistent, the motor-control part stops or prevents the drive of the motor.
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公开(公告)号：US20200244193A1
公开(公告)日：2020-07-30
申请号：US16849417
申请日：2020-04-15
Applicant: MAKITA CORPORATION
Inventor： Yuki KAWAI , Itsuku KATO
IPC: H02P1/02 , H02P6/20 , H02H9/00 , H02P29/024 , H03K17/567 , H03K5/1536 , H02M7/06 , H02M1/36
Abstract: An electric working machine according to one aspect of the present disclosure comprises a motor, a rectifier circuit, a capacitor, a series switching element, a resistive element, a drive circuit, a peak voltage value acquirer, and a controller. The capacitor smooths power rectified by the rectifier circuit. The series switching element is coupled in series with the capacitor. The resistive element is coupled in parallel with the series switching element. The controller brings the series switching element into conduction in a case where AC power is inputted to the rectifier circuit and where a specified conducting condition based on a peak voltage value acquired by the peak voltage value acquirer is satisfied.
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公开(公告)号：US20190319563A1
公开(公告)日：2019-10-17
申请号：US16379893
申请日：2019-04-10
Applicant: MAKITA CORPORATION
Inventor： Itsuku KATO , Katsuna HAYASHI , Kouichi TAKEDA , Hidenori NAGASAKA , Takeshi KAMIYA
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.
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20.发明申请公开(公告)号：US20190111551A1
公开(公告)日：2019-04-18
申请号：US16157492
申请日：2018-10-11
Applicant: MAKITA CORPORATION
Inventor： Itsuku KATO , Akira TOMONAGA , Katsuna HAYASHI , Tokuo HIRABAYASHI , Tomoyuki KONDO
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.
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