公开(公告)号：US10541636B2

公开(公告)日：2020-01-21

申请号：US15484479

申请日：2017-04-11

Applicant: MAKITA CORPORATION

Inventor： Akihiro Nakamoto ,  Itsuku Kato ,  Yuki Kawai

IPC: H02P23/28 ,  H02P27/06 ,  B23D45/16 ,  B23D47/12 ,  H02M1/08 ,  H02M7/06

Abstract: An electric working machine of an example of the present disclosure includes: a motor; a power supply portion; a controller; and a voltage detector. The power supply portion generates a DC voltage to drive the motor by rectifying an AC voltage supplied from an AC power source and smoothing by a capacitor. The controller controls energization of the motor. The voltage detector detects the AC voltage. The controller is configured to interrupt the energization when the voltage detector does not detect the AC voltage.

公开(公告)号：US11962257B2

公开(公告)日：2024-04-16

申请号：US17897624

申请日：2022-08-29

Applicant: MAKITA CORPORATION

Inventor： Yuki Kawai ,  Naoya Asami

IPC: H02K7/14 ,  F04D25/06 ,  H02P7/22 ,  H02P7/29 ,  H02P29/10 ,  H02P29/40

CPC classification number: H02P29/10 ,  F04D25/06 ,  H02P7/22 ,  H02P7/29 ,  H02P29/40

Abstract: A blower in one aspect of the present disclosure includes: a housing including a first discharge port; a motor in the housing; a fan in the housing; an attachment fitting portion; and a motor drive circuit. The attachment fitting portion is configured to detachably attach, to the first discharge port, an attachment including a second discharge port. The motor drive circuit (i) delivers a designated power to the motor and (ii) performs a constant power control that maintains a magnitude of an electric power delivered to the motor at a magnitude of the designated power.

公开(公告)号：US11554409B2

公开(公告)日：2023-01-17

申请号：US17115023

申请日：2020-12-08

Applicant: MAKITA CORPORATION

Inventor： Shunta Mizuno ,  Masahiro Watanabe ,  Yuki Kawai

IPC: B21F15/04 ,  E04C5/16 ,  E04G21/12

Abstract: A rebar tying tool (2; 302; 402) include a feed mechanism (24), which includes a first motor (32; 304) and feeds a wire (W), and a twisting mechanism, which includes a second motor (76; 306) and twists together one or more portions of the wire. A control unit (202; 350) controls the first motor and the second motor and includes a general-purpose I/O port (202c; 350c) and a motor-control-signal output port (202a; 350a). A motor-control-signal-output-destination-switching circuit (204; 310; 406) inputs motor-control signals (UH, VH, WH, UL, VL, WL) from the control unit via the motor-control-signal output port and selectively outputs the inputted motor-control signals to either the first motor or the second motor in response to input of a switching signal (SW).

公开(公告)号：US11509129B2

公开(公告)日：2022-11-22

申请号：US16849417

申请日：2020-04-15

Applicant: MAKITA CORPORATION

Inventor： Yuki Kawai ,  Itsuku Kato

IPC: H02H9/00 ,  H02P29/024 ,  H02P6/20 ,  H02M1/36 ,  H02M7/06 ,  H02P1/02 ,  H03K5/1536 ,  H03K17/567 ,  H02M5/458

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.

公开(公告)号：US11466466B2

公开(公告)日：2022-10-11

申请号：US16267868

申请日：2019-02-05

Applicant: MAKITA CORPORATION

Inventor： Yuki Kawai ,  Kunihisa Shima

IPC: B21F15/04 ,  E04G21/12 ,  B21F7/00

Abstract: An electric power tool disclosed herein may include an actuator; a control unit; and a main switch. When the main power is on, the control unit may be capable of executing at least one sequence operation in which the actuator is operated according to a predetermined sequence. When the operation to switch the main power from on to off is performed on the main switch during execution of the at least one sequence operation: the main power may be kept on and electric power supply to the actuator may be continued until the at least one sequence operation under execution is completed; and the electric power supply to the actuator may be cut off and the main power may be switched from on to off after the at least one sequence operation under execution has been completed.

公开(公告)号：US11149451B2

公开(公告)日：2021-10-19

申请号：US16222632

申请日：2018-12-17

Applicant: MAKITA CORPORATION

Inventor： Kunihisa Shima ,  Yuki Kawai

IPC: B21F15/04 ,  E04G21/12

Abstract: A tying machine may include a feeding mechanism configured to feed a tying string, a battery, and a voltage detection circuit configured to detect a voltage of the battery. The feeding mechanism may include a feeding motor to which power is supplied from the battery. The tying machine may be configured to set a duty ratio for driving the feeding motor when feeding the tying string, in accordance with the voltage of the battery detected by the voltage detection circuit.

公开(公告)号：US11065674B2

公开(公告)日：2021-07-20

申请号：US16465130

申请日：2017-11-24

Applicant: MAKITA CORPORATION

Inventor： Yuki Kawai ,  Michisada Yabuguchi ,  Hiroki Ikuta ,  Toshihito Yabunaka

IPC: B21J15/26 ,  B21J15/10 ,  B21J15/28 ,  B21J15/02 ,  B21J15/04

Abstract: A fastening tool includes a fastener-abutment part, a pin-gripping part, a motor, a driving mechanism, an input-accepting part and a motor-control part. The fastener-abutment part is configured to abut on a cylindrical part of a fastener. The pin-gripping part is configured to grip a portion of a pin of the fastener. The driving mechanism is configured to be driven by power of the motor to move the pin-gripping part rearward along a driving axis relative to the fastener-abutment part, thereby fastening a workpiece via the fastener. The input-accepting part is configured to accept setting information for a control condition of the motor inputted via an operation part configured to be externally operated by a user. The motor-control part is configured to control operation of the driving mechanism by controlling driving of the motor according to the control condition based on the setting information accepted by the input-accepting part.

公开(公告)号：US10184794B2

公开(公告)日：2019-01-22

申请号：US15194048

申请日：2016-06-27

Applicant: MAKITA CORPORATION

Inventor： Goshi Ishikawa ,  Yuki Kawai ,  Kazuki Oguchi ,  Shinji Hirabayashi ,  Shinsuke Okuda

IPC: G01C15/00

Abstract: A laser marker in one aspect of embodiments of the present disclosure comprises a laser light generator, a main body, and a pack attachment portion. The pack attachment portion is configured such that a battery pack, which is chargeable and dischargeable and supplies electric power to the laser light generator, is slidably attached to an outer surface of the main body.