公开(公告)号：US09825572B2

公开(公告)日：2017-11-21

申请号：US15008841

申请日：2016-01-28

Applicant: MAKITA CORPORATION

Inventor： Katsuhito Fujinami ,  Kazuki Iyota

IPC: B25D15/00 ,  H02P3/00 ,  H02P23/02 ,  H02K11/26 ,  H02K11/27 ,  H02P7/295

CPC classification number: H02P23/02 ,  H02K11/26 ,  H02K11/27 ,  H02P7/295

Abstract: An electric working machine according to one aspect of the present disclosure includes a motor, a current detector, a voltage detector, and a load state determination unit. The current detector is configured to detect a current flowing through the motor during drive of the motor. The voltage detector is configured to detect an input voltage supplied to the motor during drive of the motor. The load state determination unit is configured to determine whether the motor is in a no-load operation state based on the detected current, the detected input voltage and an output voltage from an electric power source.

公开(公告)号：US11751714B2

公开(公告)日：2023-09-12

申请号：US17154573

申请日：2021-01-21

Applicant: MAKITA CORPORATION

Inventor： Tomoyuki Kondo ,  Katsuhito Fujinami

IPC: A47J31/00 ,  H01M50/247 ,  A23F5/26 ,  A47J31/50 ,  H01M10/42 ,  H02K7/14

CPC classification number: A47J31/005 ,  A23F5/262 ,  A47J31/505 ,  H01M10/42 ,  H01M50/247 ,  H02K7/145

Abstract: An electrical device includes a battery-mount part (40) configured such that a battery used as a power supply of a power tool is mountable thereon, and a heat-generating element (54) for boiling water using electric power from the battery (B1, B2) mounted on the battery-mount part. The electrical device further includes a drip case (21) for holding a pod, in which a predetermined amount of tea leaves or coffee grounds is encased in a permeable bag-shaped element. A hot water supply (50y) supplies the water boiled by the heat-generating element (54) automatically to the drip case (21). An extraction part (21p) in the drip case (21) allows a beverage produced by the hot water that has been poured onto (injected into) the pod to downwardly flow.

公开(公告)号：US10925428B2

公开(公告)日：2021-02-23

申请号：US15997848

申请日：2018-06-05

Applicant: MAKITA CORPORATION

Inventor： Tomoyuki Kondo ,  Katsuhito Fujinami

IPC: A47J31/00 ,  H01M2/10 ,  A23F5/26 ,  A47J31/50 ,  H01M10/42 ,  H02J7/00 ,  H02K7/14

Abstract: An electrical device includes a battery-mount part (40) configured such that a battery used as a power supply of a power tool is mountable thereon, and a heat-generating element (54) for boiling water using electric power from the battery (B1, B2) mounted on the battery-mount part. The electrical device further includes a drip case (21) for holding a pod, in which a predetermined amount of tea leaves or coffee grounds is encased in a permeable bag-shaped element. A hot water supply (50y) supplies the water boiled by the heat-generating element (54) automatically to the drip case (21). An extraction part (21p) in the drip case (21) allows a beverage produced by the hot water that has been poured onto (injected into) the pod to downwardly flow.

公开(公告)号：US09505097B2

公开(公告)日：2016-11-29

申请号：US13898014

申请日：2013-05-20

Applicant: MAKITA CORPORATION

Inventor： Yonosuke Aoki ,  Katsuhito Fujinami

IPC: B23Q15/08 ,  B25F5/00 ,  B25D16/00

CPC classification number: B23Q15/08 ,  B25D16/003 ,  B25D2250/165 ,  B25D2250/221 ,  B25F5/00 ,  B25F5/001

Abstract: A power tool enabled to detect an inadvertent rotation at higher accuracy includes a first sensor that detects a first driving information corresponding to a kinetic movement state of the tool body when the tool body is rotated around a longitudinal axis of the tool bit in the event of a working operation of the power tool, a second sensor that detects a second driving information corresponding to an output torque of the tool bit driven by the motor, and a controller connected to the first sensor and the second sensor for controlling the power tool. The controller is configured to calculate holding information corresponding to a holding force of a user to hold the tool body based on the first driving information and the second driving information and control the driving of the power tool based on the holding information.

Abstract translation: 能够以更高精度检测无意旋转的电动工具包括第一传感器，当第一传感器检测到当工具主体围绕工具头的纵向轴线旋转时与工具主体的动态运动状态相对应的第一驱动信息， 电动工具的工作操作，第二传感器，其检测对应于由电动机驱动的工具头的输出转矩的第二驱动信息;以及控制器，连接到第一传感器和第二传感器，用于控制电动工具。 控制器被配置为基于第一驾驶信息和第二驾驶信息计算与用户握持力对应的保持信息，并且基于保持信息控制电动工具的驾驶。

公开(公告)号：US12218538B2

公开(公告)日：2025-02-04

申请号：US17680459

申请日：2022-02-25

Applicant: MAKITA CORPORATION

Inventor： Katsuhito Fujinami ,  Ken Yamauchi ,  Yasuyuki Fujimoto

IPC: H02J7/00 ,  A41D1/00 ,  H01M50/204 ,  H01M50/247

Abstract: A voltage control device in one aspect of the present disclosure includes an appliance connector, a voltage output circuit, a manual switch, and a controller. The voltage output circuit outputs an operating voltage based on a direct voltage received from a direct-current power source. In response to a first electric appliance being connected to the appliance connector, the controller controls the voltage output circuit so as to fix the operating voltage. In response to a second electric appliance being connected to the appliance connector, the controller controls the voltage output circuit so as to vary the operating voltage in accordance with a manual operation applied to the manual switch.

公开(公告)号：US11031770B2

公开(公告)日：2021-06-08

申请号：US16099219

申请日：2017-04-26

Applicant: MAKITA CORPORATION

Inventor： Yuta Izutsu ,  Katsuhito Fujinami ,  Akira Ito

IPC: H02H3/20 ,  B25F5/00 ,  H02P27/06 ,  H02H7/122 ,  B23B45/02 ,  H02P29/024

Abstract: An electric working machine in one aspect of the present disclosure includes a main current-path, a driving unit including a motor and at least one first semiconductor-switching-element, a controller, a bypass current-path, a second semiconductor-switching-element, and a switch driver. The main current-path is arranged between a positive electrode and a negative electrode of a battery. The driving unit is situated in the main current path. The bypass current-path is arranged in parallel with the driving unit. The second semiconductor-switching-element is situated in the bypass current-path. The switch driver causes the second semiconductor-switching-element to interrupt the bypass current-path in an event that a voltage value of a drive voltage applied to the driving unit is less than a threshold value, and causes the second semiconductor-switching-element to complete the bypass current-path in an event that the voltage value is equal to or greater than the threshold value.

公开(公告)号：US10821570B2

公开(公告)日：2020-11-03

申请号：US15762608

申请日：2016-09-23

Applicant: MAKITA CORPORATION

Inventor： Akira Tomonaga ,  Katsuhito Fujinami ,  Ryo Imuta ,  Masatoshi Nakahama ,  Akira Mizutani ,  Takahiro Kawakami ,  Hideharu Muto ,  Junya Ishikawa ,  Ken Goto

IPC: B24B23/02 ,  B24B55/05 ,  B24B49/10

Abstract: A grinder according to one aspect of the present disclosure includes a motor, a housing for housing the motor, a spindle protruding from the housing and configured to be driven to be rotated by the motor, a wheel cover configured to cover a part of a tip end tool attached to the spindle, a detector configured to detect the wheel cover, and a controller configured to stop or restrict the spindle being driven by the motor in response to non-detection of the wheel cover by the detector.