Patents by Inventor Takeshi Nishimiya
Takeshi Nishimiya has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230129772Abstract: An electric working machine in one aspect of the present disclosure includes: a motor; a driver to drive the motor; a first control circuit; and a second control circuit. The first control circuit controls the driver such that the motor rotates in a set rotation direction. The second control circuit is provided separately from the first control circuit. The second control circuit detects a rotation direction of the motor and performs an abnormality handling process to stop rotation of the motor in response to a situation where the detected rotation direction is reverse to the set rotation direction.Type: ApplicationFiled: December 22, 2022Publication date: April 27, 2023Applicant: MAKITA CORPORATIONInventors: Takeshi NISHIMIYA, Hidekazu SUDA
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Patent number: 11539314Abstract: An electric working machine in one aspect of the present disclosure includes: a motor; a driver to drive the motor; a first control circuit; and a second control circuit. The first control circuit controls the driver such that the motor rotates in a set rotation direction. The second control circuit is provided separately from the first control circuit. The second control circuit detects a rotation direction of the motor and performs an abnormality handling process to stop rotation of the motor in response to a situation where the detected rotation direction is reverse to the set rotation direction.Type: GrantFiled: November 22, 2017Date of Patent: December 27, 2022Assignee: MAKITA CORPORATIONInventors: Takeshi Nishimiya, Hidekazu Suda
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Patent number: 10883660Abstract: 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.Type: GrantFiled: July 26, 2017Date of Patent: January 5, 2021Assignee: MAKITA CORPORATIONInventors: Takeshi Nishimiya, Hirokatsu Yamamoto
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Patent number: 10779468Abstract: A working machine according to one aspect of the present disclosure comprises an operation rod, a leading end unit, a rear end unit, and a drive permitter. The operation rod is configured to be transformable between an extended state and a non-extended state. The leading end unit is provided at one end of the operation rod. The leading end unit comprises a motor configured to drive a working element. The rear end unit is provided at the other end of the operation rod. The rear end unit comprises a controller configured to control driving of the motor. The drive permitter is configured to permit driving of the motor when the operation rod is in the extended state and not to permit driving of the motor when the operation rod is in the non-extended state.Type: GrantFiled: March 17, 2017Date of Patent: September 22, 2020Assignee: MAKITA CORPORATIONInventors: Tomoyuki Ota, Yoshifumi Morita, Takeshi Nishimiya, Michisada Yabuguchi
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Publication number: 20200067435Abstract: An electric working machine in one aspect of the present disclosure includes: a motor; a driver to drive the motor; a first control circuit; and a second control circuit. The first control circuit controls the driver such that the motor rotates in a set rotation direction. The second control circuit is provided separately from the first control circuit. The second control circuit detects a rotation direction of the motor and performs an abnormality handling process to stop rotation of the motor in response to a situation where the detected rotation direction is reverse to the set rotation direction.Type: ApplicationFiled: November 22, 2017Publication date: February 27, 2020Applicant: MAKITA CORPORATIONInventors: Takeshi NISHIMIYA, Hidekazu SUDA
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Patent number: 10343268Abstract: A rotary impact tool according to one aspect of the present invention includes a motor, an impact mechanism, a drive unit, an impact detection unit, and a control unit. The control unit reduces a driving force for the motor caused by the drive unit when a count of impacts detected by the impact detection unit has reached a determination count set in advance, which is a value greater than one.Type: GrantFiled: June 4, 2013Date of Patent: July 9, 2019Assignee: MAKITA CORPORATIONInventors: Tokuo Hirabayashi, Ryunosuke Kumagai, Takeshi Nishimiya, Goshi Ishikawa, Takuya Kusakawa
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Patent number: 10099353Abstract: An operation switch sends an ON signal to a control processor indicating the operation switch is triggered by a user. A magnetic sensor sends a sensor signal to the control processor based on a displacement of a chip rod in a rearward direction. In the case where the sensor signal has not yet been sent, the control processor performs a control in a first mode where a brushless DC motor is not driven. In the case where sensor signal is sent, control processor performs a control in a second mode wherein the brushless DC motor is driven. An output in the first mode is lower than in the second mode. Because of this manner of construction, even if an ON input is triggered and held by the user, electric power is conserved while the operation switch is switched on and a hexagonal nut is not fastened, improving power consumption efficiency.Type: GrantFiled: April 8, 2015Date of Patent: October 16, 2018Assignee: MAKITA CORPORATIONInventors: Takeshi Nishimiya, Kazunori Tsuge, Nobuyasu Furui
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Publication number: 20180038546Abstract: 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.Type: ApplicationFiled: July 26, 2017Publication date: February 8, 2018Applicant: MAKITA CORPORATIONInventors: Takeshi NISHIMIYA, Hirokatsu YAMAMOTO
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Publication number: 20170273239Abstract: A working machine according to one aspect of the present disclosure comprises an operation rod, a leading end unit, a rear end unit, and a drive permitter. The operation rod is configured to be transformable between an extended state and a non-extended state. The leading end unit is provided at one end of the operation rod. The leading end unit comprises a motor configured to drive a working element. The rear end unit is provided at the other end of the operation rod. The rear end unit comprises a controller configured to control driving of the motor. The drive permitter is configured to permit driving of the motor when the operation rod is in the extended state and not to permit driving of the motor when the operation rod is in the non-extended state.Type: ApplicationFiled: March 17, 2017Publication date: September 28, 2017Applicant: MAKITA CORPORATIONInventors: Tomoyuki OTA, Yoshifumi MORITA, Takeshi NISHIMIYA, Michisada YABUGUCHI
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Publication number: 20170157752Abstract: An operation switch sends an ON signal to a control processor indicating the operation switch is triggered by a user. A magnetic sensor sends a sensor signal to the control processor based on a displacement of a chip rod in a rearward direction. In the case where the sensor signal has not yet been sent, the control processor performs a control in a first mode where a brushless DC motor is not driven. In the case where sensor signal is sent, control processor performs a control in a second mode wherein the brushless DC motor is driven. An output in the first mode is lower than in the second mode. Because of this manner of construction, even if an ON input is triggered and held by the user, electric power is conserved while the operation switch is switched on and a hexagonal nut is not fastened, improving power consumption efficiency.Type: ApplicationFiled: April 8, 2015Publication date: June 8, 2017Applicant: MAKITA CORPORATIONInventors: Takeshi NISHIMIYA, Kazunori TSUGE, Nobuyasu FURUI
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Patent number: 9621009Abstract: An electric power tool, which uses a DC brushless motor as a drive source and controls the DC brushless motor by a switching element, can include a tubular housing main body portion accommodating the DC brushless motor, and a grip portion protruding from a side portion of the housing main body portion. The switching element is arranged inside the grip portion, and is spaced apart from an electronic circuit board for an electronic component for operating the switching element.Type: GrantFiled: July 1, 2014Date of Patent: April 11, 2017Assignee: MAKITA CORPORATIONInventors: Yutaka Matsunaga, Takeshi Nishimiya
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Publication number: 20150158157Abstract: An electric power tool to tighten a screw while drilling a hole with the screw in a tightening-target-object includes a motor as a drive source. A motor control unit controls the motor such that the rotation number of the motor is a rotation number according to specifics of an operation input received by an operation receiving unit with a preset maximum rotation number as an upper limit. At a start-up of the motor, the maximum rotation number is set to a first maximum rotation number. When it is detected that a hole has been drilled in the tightening-target-object with the screw after the start-up of the motor, the maximum rotation number is set to a second maximum rotation number lower than the first maximum rotation number. The second maximum rotation number is set according to a material thickness so as to become lower as the material thickness is smaller.Type: ApplicationFiled: May 31, 2013Publication date: June 11, 2015Inventors: Tokuo Hirabayashi, Ryunosuke Kumagai, Takeshi Nishimiya, Goshi Ishikawa, Takuya Kusakawa
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Publication number: 20150144365Abstract: A rotary impact tool according to one aspect of the present invention includes a motor, an impact mechanism, a drive unit, an impact detection unit, and a control unit. The control unit reduces a driving force for the motor caused by the drive unit when a count of impacts detected by the impact detection unit has reached a determination count set in advance, which is a value greater than one.Type: ApplicationFiled: June 4, 2013Publication date: May 28, 2015Inventors: Tokuo Hirabayashi, Ryunosuke Kumagai, Takeshi Nishimiya, Goshi Ishikawa, Takuya Kusakawa
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Publication number: 20150135907Abstract: A power tool of one aspect for tightening a screw to a tightening-target-object is provided with a motor as a drive force. A motor controlling device controls the motor so as to make rotational frequency of the motor in accordance with an input operation received by an input-operation receiving unit. A first setting unit sets a maximum rotational frequency to a given first maximum rotational frequency when the motor is initiated. If the power tool clears a given condition for increasing rotational frequency after the motor is initiated, a second setting unit sets the maximum rotational frequency to a given second maximum rotational frequency that is larger than the first maximum rotational frequency.Type: ApplicationFiled: May 20, 2013Publication date: May 21, 2015Inventors: Tokuo Hirabayashi, Ryunosuke Kumagai, Takeshi Nishimiya, Goshi Ishikawa, Takuya Kusakawa
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Publication number: 20140312721Abstract: An electric power tool, which uses a DC brushless motor as a drive source and controls the DC brushless motor by a switching element, can include a tubular housing main body portion accommodating the DC brushless motor, and a grip portion protruding from a side portion of the housing main body portion. The switching element is arranged inside the grip portion, and is spaced apart from an electronic circuit board for an electronic component for operating the switching element.Type: ApplicationFiled: July 1, 2014Publication date: October 23, 2014Applicant: Makita CorporationInventors: Yutaka MATSUNAGA, Takeshi NISHIMIYA
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Patent number: 8810085Abstract: An electric power tool, which uses a DC brushless motor as a drive source and controls the DC brushless motor by a switching element, can include a tubular housing main body portion accommodating the DC brushless motor, and a grip portion protruding from a side portion of the housing main body portion. The switching element is arranged inside the grip portion, and is spaced apart from an electronic circuit board for an electronic component for operating the switching element.Type: GrantFiled: July 2, 2009Date of Patent: August 19, 2014Assignee: Makita CorporationInventors: Yutaka Matsunaga, Takeshi Nishimiya
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Patent number: 8350512Abstract: An electric power tool is provided that includes a motor as a driving source, a first operation switch, a first semiconductor switch, and a second semiconductor switch. The first operation switch is operated by a user to be turned ON/OFF. The first semiconductor switch, provided on a current path from the power source to the motor, includes at least one semiconductor switching device. When the first operation switch is OFF, the first semiconductor switch is turned OFF to interrupt the current path. When the first operation switch is ON, the first semiconductor switch is turned ON to close the current path. The second semiconductor switch is provided on the current path in series with the first semiconductor switch and includes at least one semiconductor switching device. The second semiconductor switch closes/interrupts the current path by being turned ON/OFF in accordance with an input control signal.Type: GrantFiled: December 13, 2011Date of Patent: January 8, 2013Assignee: Makita CorporationInventors: Yutaka Matsunaga, Hidekazu Suda, Takeshi Nishimiya
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Patent number: 8346384Abstract: A cutting machine of the present invention for cutting a material to be cut, which is placed on a table, with a rotating saw blade, includes an imaging device, a determination device and a stopping device. The imaging device takes a video image of an area on the table and outputs the video image. The determination device makes a determination on whether or not a number of pixels of a specific color, which is previously set, exceeds a predetermined threshold in one frame of image constituting the video image outputted from the imaging device. The stopping device stops rotation of the saw blade when it is determined by the determination device that the number of pixels of the specific color exceeds the predetermined threshold.Type: GrantFiled: June 19, 2009Date of Patent: January 1, 2013Assignee: Makita CorporationInventors: Kazuhito Murakami, Kazutoki Otake, Hiroshi Murata, Yutaka Matsunaga, Takeshi Nishimiya
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Publication number: 20120079799Abstract: An electric power tool is provided that includes a motor as a driving source, a first operation switch, a first semiconductor switch, and a second semiconductor switch. The first operation switch is operated by a user to be turned ON/OFF. The first semiconductor switch, provided on a current path from the power source to the motor, includes at least one semiconductor switching device. When the first operation switch is OFF, the first semiconductor switch is turned OFF to interrupt the current path. When the first operation switch is ON, the first semiconductor switch is turned ON to close the current path. The second semiconductor switch is provided on the current path in series with the first semiconductor switch and includes at least one semiconductor switching device. The second semiconductor switch closes/interrupts the current path by being turned ON/OFF in accordance with an input control signal.Type: ApplicationFiled: December 13, 2011Publication date: April 5, 2012Applicant: MAKITA CORPORATIONInventors: Yutaka MATSUNAGA, Hidekazu SUDA, Takeshi NISHIMIYA
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Patent number: 8098036Abstract: An electric power tool is provided that includes a motor as a driving source, a first operation switch, a first semiconductor switch, and a second semiconductor switch. The first operation switch is operated by a user to be turned ON/OFF. The first semiconductor switch, provided on a current path from the power source to the motor, includes at least one semiconductor switching device. When the first operation switch is OFF, the first semiconductor switch is turned OFF to interrupt the current path. When the first operation switch is ON, the first semiconductor switch is turned ON to close the current path. The second semiconductor switch is provided on the current path in series with the first semiconductor switch and includes at least one semiconductor switching device. The second semiconductor switch closes/interrupts the current path by being turned ON/OFF in accordance with an input control signal.Type: GrantFiled: June 26, 2009Date of Patent: January 17, 2012Assignee: Makita CorporationInventors: Yutaka Matsunaga, Hidekazu Suda, Takeshi Nishimiya