Patents by Inventor Itaru MURUI
Itaru MURUI 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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Patent number: 11890727Abstract: An electric power tool includes: a driving shaft that is rotated by a motor; an output shaft on which a front-end tool is attachable; and a torque transmission mechanism that transmits a torque produced by the rotation of the driving shaft to the output shaft. The torque transmission mechanism includes a magnet coupling including a driving magnet member coupled to a side of the driving shaft and a driven magnet member coupled to a side of the output shaft, and the driving magnet member and the driven magnet member are provided such that respective magnetic surfaces face each other, S-poles and N-poles being alternately arranged on each of the magnetic surfaces.Type: GrantFiled: December 20, 2021Date of Patent: February 6, 2024Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Itaru Murui, Hiroaki Murakami, Mitsumasa Mizuno, Akiko Honda, Satoshi Kajiyama
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Publication number: 20230390901Abstract: An electric tool includes a holder, a motor, a transmission mechanism, a torque detection unit, a clutch mechanism, and a controller. The holder is configured to hold a tip tool thereon. The transmission mechanism transmits torque of the motor to the holder. The torque detection unit detects the torque transmitted from the motor to the holder. The clutch mechanism is switchable from a transmitting state where the torque of the motor is transmitted to the holder to an interrupted state where no torque of the motor is transmitted to the holder, and vice versa. The controller switches, when a predetermined condition about the torque detected by the torque detection unit is satisfied, the clutch mechanism from the transmitting state to the interrupted state.Type: ApplicationFiled: December 27, 2021Publication date: December 7, 2023Inventors: Kotaro MOMOEDA, Itaru MURUI, Akito NAKAMURA
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Patent number: 11724371Abstract: An electric power tool includes: an output shaft on which a front-end tool is adapted to be mounted; and a power transmission mechanism that transmits a rotational output of a motor to the output shaft. A posture information acquisition unit acquires posture information for identifying a posture of the electric power tool. A torque information acquisition unit acquires torque information indicating a measured value of tightening torque produced by the front-end tool. A transmission unit transmits the posture information, the torque information, and time information related to a time when respective information is acquired to an external apparatus.Type: GrantFiled: June 26, 2019Date of Patent: August 15, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Itaru Murui, Mitsumasa Mizuno, Hiroaki Murakami, Takashi Kusagawa, Masahiro Sato, Masanori Nakamoto, Akiko Honda
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Publication number: 20230158646Abstract: An electric tool system includes: a motor; an output shaft to be coupled to a tip tool; a transmission mechanism that transmits motive power of the motor to the output shaft; an acquirer that acquires, based on a current flowing through the motor, a torque value related to output torque provided by the tip tool; and a controller that has a torque management mode in which the controller controls the motor in accordance with an operating command entered by a user through a trigger switch and prevents the torque value from exceeding an upper limit value. The controller controls, when finding a predetermined condition satisfied in the torque management mode, a velocity of the motor into a predetermined restriction value irrespective of a manipulative variable of the trigger switch. The predetermined condition includes a condition that the torque value reach a threshold value smaller than the upper limit value.Type: ApplicationFiled: February 10, 2021Publication date: May 25, 2023Inventors: Itaru MURUI, Shota FUJII, Kotaro MOMOEDA
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Publication number: 20230120149Abstract: An electric tool includes an output shaft and a controller. The output shaft is configured to hold a tip tool and be rotated by motive power provided from an electric motor with the output shaft holding the tip tool. The controller is configured to control rotation of the output shaft in accordance with pressing force in a direction from a tip end of the tip tool toward the output shaft. The electric tool has, as an operation range, a restriction range in which rotation of the output shaft is restricted in a state where the pressing force is less than or equal to a prescribed value.Type: ApplicationFiled: September 18, 2020Publication date: April 20, 2023Inventors: Itaru MURUI, Kotaro MOMOEDA, Kota KITAMURA, Naoki TSUJIMOTO, Akito NAKAMURA
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Patent number: 11632017Abstract: A motor for electric power tools according to an embodiment includes: a rotor having a rotational shaft; a stator having a coil to rotate the rotor; a first substrate mounting a sensor element to detect a rotational position of the rotor; and a second substrate mounting a switching element to change, based on a result of detection by the sensor element, a conducting direction in which a current flows with respect to the coil. The first substrate and the second substrate are arranged side by side along, and intersect at right angles with, the rotational shaft.Type: GrantFiled: March 24, 2020Date of Patent: April 18, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Itaru Murui, Masari Muramatsu, Motoharu Muto, Kota Kitamura
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Publication number: 20230046437Abstract: A battery pack is a battery pack for an electric tool. The battery pack is attachable to a tool body. The tool body includes a tool attachment part to which a tool is to be attached and a driver configured to drive the tool. The battery pack includes an electricity accumulator, a battery case, and a cushioning structure. The electricity accumulator includes an all-solid-state battery. The electricity accumulator is configured to accumulate electric power to be supplied to the driver. The battery case houses the electricity accumulator. The cushioning structure is configured to suppress acceleration acting on the electricity accumulator from being changed.Type: ApplicationFiled: December 11, 2020Publication date: February 16, 2023Inventor: Itaru MURUI
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Patent number: 11569725Abstract: A torque transmission mechanism transmits a torque produced by a rotation of a driving shaft to an output shaft. A clutch mechanism is provided between a motor and the torque transmission mechanism. The torque transmission mechanism includes a magnet coupling including a driving magnet member coupled to the driving shaft side and a driven magnet member coupled to the output shaft side. The driving magnet member and the driven magnet member are arranged such that magnetic surfaces on each of which S-pole magnets and N-pole magnets are alternately arranged face other. The clutch mechanism transmits the torque produced by the rotation of the driving shaft to the driving magnet member but does not transmit a torque the driving magnet member receives from the driven magnet member to the driving shaft.Type: GrantFiled: June 15, 2018Date of Patent: January 31, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Mitsumasa Mizuno, Itaru Murui, Satoshi Kajiyama, Hiroaki Murakami, Akiko Honda
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Publication number: 20230001549Abstract: An electric tool system includes a motor, a control unit, and an output shaft. The motor includes a stator and a rotor. The control unit performs vector control on the motor. The control unit includes a first acquisition unit, a second acquisition unit, and a command value generation unit. The command value generation unit calculates, based on a torque current acquisition value (current measured value) as a value related to a torque current as acquired by the first acquisition unit and an acceleration acquisition value as a value related to acceleration of the rotor as acquired by the second acquisition unit, at least one of a command value of the torque current to be supplied to the motor or a command value of an excitation current to be supplied to the motor.Type: ApplicationFiled: September 18, 2020Publication date: January 5, 2023Inventors: Itaru MURUI, Shota FUJII, Keita OKAMOTO, Naoki TSUJIMOTO, Kota KITAMURA, Kotaro MOMOEDA
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Publication number: 20220410283Abstract: An electric tool includes a pressure-sensitive sensor, a support, an output shaft, and a controller. The pressure-sensitive sensor is configured to sense pressing force which is externally provided. The support supports the pressure-sensitive sensor. The output shaft is configured to hold a tip tool and be rotated relative to the support by motive power provided from an electric motor with the output shaft holding the tip tool. The controller is configured to control rotation of the output shaft in accordance with an output according to the pressing force, the output being output from the pressure-sensitive sensor.Type: ApplicationFiled: September 18, 2020Publication date: December 29, 2022Inventors: Kota KITAMURA, Itaru MURUI, Naoki TSUJIMOTO, Kotaro MOMOEDA, Akito NAKAMURA
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Publication number: 20220362920Abstract: An electric tool includes a body portion, a grip portion, and a battery pack. The body portion includes: a tool attachment member to which a tool is attached; a driving unit to drive the tool; and a transmission unit to transmit driving force of the driving unit to the tool. The grip portion is provided for the body portion and includes a gripping part to be held by a user with his or her hand. The battery pack supplies power to the driving unit. The battery pack includes an all-solid-state battery.Type: ApplicationFiled: August 28, 2020Publication date: November 17, 2022Inventor: Itaru MURUI
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Publication number: 20220362921Abstract: An electric tool includes a body portion, a grip portion including a gripping part designed to be held by a user with his or her hand, and a battery pack. The body portion is connected to a first end portion of the grip portion. The battery pack is attached to a second end portion thereof. The electric tool in its entirety, including the body portion, the grip portion, and the battery pack, may stand by itself with a bottom surface, opposite from the grip portion, of the battery pack put on a mounting surface. The battery pack includes a plurality of all-solid-state batteries, each of which is formed in a sheet shape. The plurality of all-solid-state batteries are stacked one on top of another.Type: ApplicationFiled: August 28, 2020Publication date: November 17, 2022Inventor: Itaru MURUI
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Publication number: 20220288766Abstract: An electric tool includes a body portion, a grip portion, and a battery pack. The body portion includes: a tool attachment member to which a tool is attached; a driving unit; and a transmission unit to transmit driving force of the driving unit to the tool. The grip portion is provided for the body portion and includes a gripping part to be held by a user with his or her hand. At least part of the battery pack is provided at one end portion, located opposite from the body portion, of the grip portion. The battery pack supplies power to the driving unit. The battery pack includes: a connection terminal portion to be electrically connected to the driving unit when the battery pack is attached to the grip portion; and a power storage unit. The power storage unit includes an all-solid-state battery electrically connected to the connection terminal portion.Type: ApplicationFiled: August 28, 2020Publication date: September 15, 2022Inventor: Itaru MURUI
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Publication number: 20220143789Abstract: A torque transmission mechanism includes a magnet coupling including a driving magnet member coupled to a driving shaft side and a driven magnet member coupled to an output shaft side. One of the driving magnet member or the driven magnet member rotatably supports the other of the driving magnet member or the driven magnet member.Type: ApplicationFiled: January 22, 2020Publication date: May 12, 2022Inventors: Takashi Kusagawa, Mitsumasa MIZUNO, Itaru MURUI
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Publication number: 20220115969Abstract: An electric tool includes: a motor; an attachment unit to receive a tip tool attached thereto; a drive control unit to control the motor; a number of revolutions detection unit; and a torque detection unit. The number of revolutions detection unit detects a number of revolutions of a first detection target shaft. The torque detection unit detects a load torque of a second detection target shaft. The drive control unit detects, based on the number of revolutions and load torque detected, an unstable behavior of at least one of the tip tool, the first detection target shaft, or the second detection target shaft and either decelerates, or stops running, the motor when detecting the unstable behavior.Type: ApplicationFiled: October 11, 2021Publication date: April 14, 2022Inventors: Itaru MURUI, Kotaro MOMOEDA, Shota FUJII
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Publication number: 20220111498Abstract: An electric power tool includes: a driving shaft that is rotated by a motor; an output shaft on which a front-end tool is attachable; and a torque transmission mechanism that transmits a torque produced by the rotation of the driving shaft to the output shaft. The torque transmission mechanism includes a magnet coupling including a driving magnet member coupled to a side of the driving shaft and a driven magnet member coupled to a side of the output shaft, and the driving magnet member and the driven magnet member are provided such that respective magnetic surfaces face each other, S-poles and N-poles being alternately arranged on each of the magnetic surfaces.Type: ApplicationFiled: December 20, 2021Publication date: April 14, 2022Inventors: Itaru MURUI, Hiroaki MURAKAMI, Mitsumasa MIZUNO, Akiko HONDA, Satoshi KAJIYAMA
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Patent number: 11235445Abstract: An electric power tool includes: a driving shaft that is rotated by a motor; an output shaft on which a front-end tool is attachable; and a torque transmission mechanism that transmits a torque produced by the rotation of the driving shaft to the output shaft. The torque transmission mechanism includes a magnet coupling including a driving magnet member coupled to a side of the driving shaft and a driven magnet member coupled to a side of the output shaft, and the driving magnet member and the driven magnet member are provided such that respective magnetic surfaces face each other, S-poles and N-poles being alternately arranged on each of the magnetic surfaces.Type: GrantFiled: November 30, 2017Date of Patent: February 1, 2022Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Itaru Murui, Hiroaki Murakami, Mitsumasa Mizuno, Akiko Honda, Satoshi Kajiyama
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Publication number: 20210331305Abstract: An electric power tool includes: a motor; an output shaft; and a power transmission mechanism that transmits a rotational output of the motor to the output shaft. A motor control unit controls rotation of the motor in accordance with an on operation of the user operation switch performed by a user. A detector detects physical quantity data while the motor is being rotated. A status determination unit determines whether the electric power tool is in a deteriorated status, by using the physical quantity data. A notification interface communicates that the electric power tool is in a deteriorated status while the motor is not being rotated.Type: ApplicationFiled: June 26, 2019Publication date: October 28, 2021Inventors: Itaru MURUI, Hiroaki MURAKAMI, Akiko HONDA, Masanori NAKAMOTO, Mitsumasa MIZUNO, Takashi KUSAGAWA, Masahiro SATO
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Publication number: 20210323125Abstract: In an electric power tool, an acquisition unit acquires physical quantity data detected while a motor is being rotated. A storage unit stores the physical quantity data and time information related to time when the physical quantity data is acquired, mapping the physical quantity data and the time information to each other. A transmission unit transmits the physical quantity data and the time information to a server system. The server system includes: a server-side reception unit that receives the physical quantity data and the time information transmitted; and a status evaluation unit that evaluates a level of a status of the electric power tool by using the physical quantity data and the time information.Type: ApplicationFiled: June 26, 2019Publication date: October 21, 2021Inventors: Itaru MURUI, Hiroaki MURAKAMI, Akiko HONDA, Masanori NAKAMOTO, Takashi KUSAGAWA, Masahiro SATO, Mitsumasa MIZUNO
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Publication number: 20210229256Abstract: A torque transmission mechanism includes a magnet coupling including a driving magnet member coupled to a side of driving shaft driven into rotation by a motor and a driven magnet member coupled to a side of an output shaft on which a front-end tool is attachable. A clutch mechanism is provided between the motor and the torque transmission mechanism. A moment of inertia on the side of the driven magnet member is larger than a moment of inertia on the side of the driving magnet member.Type: ApplicationFiled: March 20, 2019Publication date: July 29, 2021Inventors: Mitsumasa MIZUNO, Itaru MURUI, Atsushi NAKAMURA