公开(公告)号：US10780563B2

公开(公告)日：2020-09-22

申请号：US15724766

申请日：2017-10-04

Applicant: MAKITA CORPORATION

Inventor： Yoshitaka Ichikawa ,  Hirokatsu Yamamoto ,  Ryo Umemoto ,  Kunihisa Shima

IPC: B25D16/00 ,  B25D17/24 ,  B25D17/04

Abstract: An electric power tool according to one aspect of the present disclosure includes a main body, a motor, a tool holder configured to hold a tool bit, a hammer, a motion converter, a rotation transmitter, a first load detector, a second load detector, and a motor controller. The first load detector detects, based on information indicating a drive state of the motor, a load imposed from a work piece to the tool bit. The second load detector detects, based on information indicating a behavior of the main body, a load imposed from the work piece to the tool bit. The motor controller sets an upper limit of rotational speed of the motor to a predetermined no-load rotational speed in response to no-load on the tool bit being detected by both the first load detector and the second load detector.

公开(公告)号：US10592151B2

公开(公告)日：2020-03-17

申请号：US15244130

申请日：2016-08-23

Applicant: MAKITA CORPORATION

Inventor： Hirokatsu Yamamoto ,  Yoshitaka Ichikawa

IPC: G06F3/06 ,  G06F12/0868 ,  B25C1/08 ,  B25F5/00 ,  G05B19/042

Abstract: A work apparatus in one aspect of the present disclosure comprises a control unit, a volatile memory and a rewritable non-volatile memory. The control unit comprises an update processing unit and a writing processing unit. The writing processing unit writes history information in the volatile memory into the non-volatile memory when the writing processing unit predicts a suspension of supply of an electric power to the control unit.

公开(公告)号：US09737984B2

公开(公告)日：2017-08-22

申请号：US14534418

申请日：2014-11-06

Applicant: MAKITA CORPORATION

Inventor： Hirokatsu Yamamoto ,  Takaaki Osada ,  Manabu Sugimoto

IPC: B25B23/147 ,  B25F5/00 ,  B25B21/00 ,  B23B45/00 ,  B25B23/14 ,  B25B23/00

CPC classification number: B25F5/001 ,  B23B45/008 ,  B25B21/008 ,  B25B23/0064 ,  B25B23/141 ,  B25B23/147

Abstract: It is an object of the invention to provide a technique for enhancing the operability of a power tool.A representative screwdriver 100 is provided which has a motor 110 and a driving mechanism 120. The driving mechanism 120 has a rotation transmitting mechanism including a driving cam 137 and a driven cam 157, and a cam engagement state is switched by movement of the spindle 150 in a longitudinal direction of the spindle. The position of the spindle 150 in the longitudinal direction is detected by a detecting mechanism 162 that is disposed on the opposite side of the rotation transmitting mechanism from a front end region in the longitudinal direction of the spindle 150. A controller 180 controls the rotation speed of the motor 110 based on the detection result of the detecting mechanism 162 and drives the motor 110.

公开(公告)号：US11865924B2

公开(公告)日：2024-01-09

申请号：US17855367

申请日：2022-06-30

Applicant: MAKITA CORPORATION

Inventor： Ryo Umemoto ,  Hirokatsu Yamamoto

IPC: B60L15/20 ,  B62B5/00 ,  H02P3/22 ,  H02P5/74 ,  B60L15/30

CPC classification number: B60L15/2009 ,  B60L15/30 ,  B62B5/0036 ,  B62B5/0069 ,  H02P3/22 ,  H02P5/74 ,  B60L2240/425

Abstract: A cart may include a driving wheel, a motor configured to rotate the driving wheel, a motor drive circuit configured to drive the motor, a motor brake circuit configured to electrically brake the motor, a control device configured to control the motor via the motor drive circuit and the motor brake circuit so that a travelling speed of the cart becomes equal to or lower than an upper limit travelling speed, and a temperature sensor configured to detect a temperature of the motor brake circuit. The control device may be configured to change the upper limit travelling speed to a second upper limit travelling speed lower than the first upper limit travelling speed when the upper limit travelling speed is a first upper limit travelling speed and the temperature detected by the temperature sensor exceeds a first predetermined temperature.

公开(公告)号：US11027867B2

公开(公告)日：2021-06-08

申请号：US16222076

申请日：2018-12-17

Applicant: MAKITA CORPORATION

Inventor： Hirokatsu Yamamoto ,  Kunihisa Shima

IPC: B65B13/22 ,  B65B13/18 ,  B65B13/28

Abstract: A tying machine may include a twisting mechanism configured to twist a tying string. The twisting mechanism may include a twisting motor. The tying machine may be configured to obtain torque acting on the twisting motor as a twisting torque value, and stop the twisting motor when a predetermined tying completion condition is satisfied. The tying completion condition may include that an elapsed time since a rise in the twisting torque value was detected reaches a first predetermined time.

公开(公告)号：US10954947B2

公开(公告)日：2021-03-23

申请号：US15568062

申请日：2016-04-19

Applicant: MAKITA CORPORATION

Inventor： Hirokatsu Yamamoto ,  Yuki Kawai ,  Makoto Takahashi

IPC: H02P6/06 ,  H02P5/46 ,  B08B5/02 ,  H02P5/74 ,  F04D25/08 ,  H02P6/18 ,  F04D25/06 ,  F04D27/00 ,  H02P6/04

Abstract: A backpack-type blower according to one aspect of the present disclosure includes a plurality of fans, a plurality of DC power supplies and a backpack. The plurality of fans and the plurality of DC power supplies are mounted on the backpack. The backpack-type blower is configured to blow winds from the plurality of fans together.

公开(公告)号：US10883660B2

公开(公告)日：2021-01-05

申请号：US15660372

申请日：2017-07-26

Applicant: MAKITA CORPORATION

Inventor： Takeshi Nishimiya ,  Hirokatsu Yamamoto

IPC: F16P3/00 ,  B24B23/02 ,  B25F5/00

Abstract: An electric power tool in one aspect of the present disclosure comprises a main body, a motor, a driver, a detector, and a kickback determiner. The kickback determiner determines that the main body is kicked back from a workpiece when an attitude change amount of the main body detected by the detector exceeds a preset kickback determination threshold during driving of the motor by the driver.

公开(公告)号：US20250113770A1

公开(公告)日：2025-04-10

申请号：US18907999

申请日：2024-10-07

Applicant: MAKITA CORPORATION

Inventor： Tatsuya YOSHIKAWA ,  Hirokatsu Yamamoto ,  Genki Toyoda

IPC: A01D34/00 ,  A01D101/00

Abstract: A working robot may be configured to move and work autonomously. The working robot may include a robot body including a base and a bumper supported by the base, a working unit supported by the base, a movement mechanism configured to move the base, a movement motor configured to drive the movement mechanism, a first detection unit configured to detect a force that the bumper receives or displacement of the bumper relative to the base, a second detection unit configured to detect an angular velocity of the base or a state of the movement motor, and a control unit. The control unit may be configured to determine, based on a detection result detected by the first detection unit and a detection result detected by the second detection unit, whether the movement of the working robot is hindered by an obstacle.

公开(公告)号：US10422146B2

公开(公告)日：2019-09-24

申请号：US15742573

申请日：2016-03-11

Applicant: MAKITA CORPORATION

Inventor： Kunihisa Shima ,  Hirokatsu Yamamoto ,  Ryo Umemoto

IPC: E04G21/12 ,  B21F15/00 ,  B21F15/06 ,  B25B25/00

Abstract: A rebar tying device is configured to tie a plurality of rebars by a wire. The rebar tying device includes a feeder configured to feed the wire wound around a reel by a rotation of a feeding motor; a guide configured to guide the wire fed by the feeder to around the plurality of rebars; a cutter configured to cut the wire fed by the feeder at a predetermined position; a twister configured to twist the wire around the plurality of rebars; a battery configured to supply power to the feeding motor; and a control unit. The control unit configured to control a feeding length of the wire by controlling an energizing time of the feeding motor based on a predetermined feeding length of the wire.

公开(公告)号：US20250076885A1

公开(公告)日：2025-03-06

申请号：US18800597

申请日：2024-08-12

Applicant: MAKITA CORPORATION

Inventor： Tatsuya YOSHIKAWA ,  Hirokatsu Yamamoto ,  Masahiro Kojima ,  Genki Toyoda

IPC: G05D1/244 ,  A01D34/00 ,  B60L53/36 ,  G05D1/661 ,  G05D105/15

Abstract: An autonomous movement system may include: a working robot configured to perform an operation while moving autonomously in a working area; a charging station configured to charge the working robot; a boundary wire defining the working area; and a station wire disposed at the charging station and electrically connected to the boundary wire. The working robot may include: a magnetic detecting unit configured to detect a magnetic field generated by the boundary wire and a magnetic field generated by the station wire; and a control unit configured to detect the station wire based on a detection result by the magnetic detecting unit. The charging station may include: a charging terminal configured to be electrically connected to the working robot; and a signal generator configured to supply an identical electric signal to the boundary wire and the station wire.