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公开(公告)号：US11529669B2
公开(公告)日：2022-12-20
申请号：US17115045
申请日：2020-12-08
Applicant: MAKITA CORPORATION
Inventor： Shunta Mizuno , Yuki Kawai
Abstract: A rebar tying tool includes: a feed mechanism (24), which includes a first brushless motor (32) and performs an advancing process that advances a wire (W) and a draw-back process that draws back the wire (W); a first inverter circuit (212), which is electrically connected to the first brushless motor; and a control unit (202), which controls the first brushless motor via the first inverter circuit. The first brushless motor comprises a first Hall-effect sensor (180), which is disposed on a first sensor board (178). In the advancing process, the control unit performs lead-angle control on the first brushless motor at a first lead angle. In the draw-back process, the control unit performs lead-angle control on the first brushless motor at a second lead angle. The first lead angle is set to be larger than the second lead angle.
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公开(公告)号：US20150217436A1
公开(公告)日：2015-08-06
申请号：US14399647
申请日：2013-05-07
Applicant: MAKITA CORPORATION
Inventor： Kenya Yanagihara , Ying Yang , Yoshitaka Ichikawa , Yuki Kawai
CPC classification number: B25C1/041 , B25C1/04 , B25C1/06 , Y10T29/49833
Abstract: A driving tool, such as a nailer, includes a compression piston slidably disposed within a compression cylinder. An electric motor and a crank mechanism reciprocally drive the compression piston within the compression cylinder, and a sensor directly or indirectly detects the position of the compression piston. Prior to the start of a driving operation, a return operation is performed to move the compression piston to its bottom dead center when the sensor detects that the compression piston is located at a position other its bottom dead center.
Abstract translation: 诸如钉枪的打入工具包括可滑动地设置在压缩缸内的压缩活塞。 电动机和曲柄机构在压缩气缸内往复驱动压缩活塞，传感器直接或间接地检测压缩活塞的位置。 在开始驾驶操作之前，当传感器检测到压缩活塞位于其下死点以外的位置时，执行返回操作以将压缩活塞移动到其下止点。
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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.
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公开(公告)号：US10131047B2
公开(公告)日：2018-11-20
申请号：US14399647
申请日：2013-05-07
Applicant: MAKITA CORPORATION
Inventor： Kenya Yanagihara , Ying Yang , Yoshitaka Ichikawa , Yuki Kawai
Abstract: A driving tool, such as a nailer, includes a compression piston slidably disposed within a compression cylinder. An electric motor and a crank mechanism reciprocally drive the compression piston within the compression cylinder, and a sensor directly or indirectly detects the position of the compression piston. Prior to the start of a driving operation, a return operation is performed to move the compression piston to its bottom dead center when the sensor detects that the compression piston is located at a position other its bottom dead center.
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公开(公告)号：US11045861B2
公开(公告)日：2021-06-29
申请号：US16465120
申请日：2017-11-24
Applicant: MAKITA CORPORATION
Inventor： Yuki Kawai , Michisada Yabuguchi , Hiroki Ikuta , Toshihito Yabunaka
Abstract: A fastening tool includes a bolt-gripping part, an anvil, a motor, and a control part. When the bolt-gripping part grips an end region of a shaft part and moves relative to the anvil in a first direction of a longitudinal-axis direction, the anvil presses a collar fitted onto the shaft part in a second direction opposite to the first direction of the longitudinal-axis direction and inward in a radial direction of the collar, so that a hollow part of the collar is crimped to a groove while the workpiece is clamped between the collar and a head part, whereby swaging of a fastener is completed while the end region remains integrated with the shaft part. The control part completes swaging of the fastener by terminating a movement of the bolt-gripping part in the first direction relative to the anvil based on driving current of the motor.
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Patent Agency Ranking
公开(公告)号：US10898041B2
公开(公告)日：2021-01-26
申请号：US16232827
申请日：2018-12-26
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 ½ cycle of the alternating-current voltage.
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公开(公告)号：US10658951B2
公开(公告)日：2020-05-19
申请号：US15657484
申请日：2017-07-24
Applicant: MAKITA CORPORATION
Inventor： Yuki Kawai , Itsuku Kato
IPC: H02P1/02 , H02P29/024 , H02H9/00 , H02P6/20 , H02M1/36 , H02M7/06 , H03K5/1536 , H03K17/567 , H02M1/42
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：US09621081B2
公开(公告)日：2017-04-11
申请号：US14978697
申请日：2015-12-22
Applicant: MAKITA CORPORATION
Inventor： Yuki Kawai , Yoshitaka Ichikawa , Hirokatsu Yamamoto , Ying Yang
CPC classification number: H02P6/157 , H02P6/085 , H02P6/14 , H02P27/08 , H02P2201/03
Abstract: A motor-driven apparatus in one aspect of the present disclosure includes: a brushless motor; a full-wave rectifier circuit; a drive circuit; a controller; and a forcible stop unit. The forcible stop unit performs a forcible stop control to temporarily forcibly stop a switching operation of a plurality of switching elements during a stop period when a full-wave rectified voltage is smaller than an induced voltage generated by a plurality of coils, and the switching operation of the plurality of switching elements is to be stopped.
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公开(公告)号：US11571099B2
公开(公告)日：2023-02-07
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 ½ cycle of the alternating-current voltage.
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公开(公告)号：US11117185B2
公开(公告)日：2021-09-14
申请号：US16624161
申请日：2018-06-08
Applicant: MAKITA CORPORATION
Inventor： Michisada Yabuguchi , Yuki Kawai , Hiroki Ikuta
Abstract: A fastening tool includes a housing, a fastener-abutment part, a pin-gripping part held within the fastener-abutment part to be movable in a front-rear direction relative to the fastener-abutment part, a detection-target part provided to move together with the pin-gripping part, a detection device configured to detect the detection-target part, a motor, and a driving mechanism configured to move the pin-gripping part rearward from an initial position relative to the fastener-abutment part. The driving mechanism is further configured to move the pin-gripping part forward relative to the fastener-abutment part so as to return the pin-gripping part to the initial position based on a detection result of the detection device. The fastening tool is configured such that a first moving distance is adjustable, the first moving distance being a distance by which the pin-gripping part is moved from a detection position to the initial position.
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