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).

  • Publication number: 20220143789
    Abstract: 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: Application
    Filed: January 22, 2020
    Publication date: May 12, 2022
    Inventors: Takashi Kusagawa, Mitsumasa MIZUNO, Itaru MURUI
  • Publication number: 20220115969
    Abstract: 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: Application
    Filed: October 11, 2021
    Publication date: April 14, 2022
    Inventors: Itaru MURUI, Kotaro MOMOEDA, Shota FUJII
  • Publication number: 20220111498
    Abstract: 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: Application
    Filed: December 20, 2021
    Publication date: April 14, 2022
    Inventors: Itaru MURUI, Hiroaki MURAKAMI, Mitsumasa MIZUNO, Akiko HONDA, Satoshi KAJIYAMA
  • Patent number: 11235445
    Abstract: 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: Grant
    Filed: November 30, 2017
    Date of Patent: February 1, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Itaru Murui, Hiroaki Murakami, Mitsumasa Mizuno, Akiko Honda, Satoshi Kajiyama
  • Publication number: 20210331305
    Abstract: 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: Application
    Filed: June 26, 2019
    Publication date: October 28, 2021
    Inventors: Itaru MURUI, Hiroaki MURAKAMI, Akiko HONDA, Masanori NAKAMOTO, Mitsumasa MIZUNO, Takashi KUSAGAWA, Masahiro SATO
  • Publication number: 20210323125
    Abstract: 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: Application
    Filed: June 26, 2019
    Publication date: October 21, 2021
    Inventors: Itaru MURUI, Hiroaki MURAKAMI, Akiko HONDA, Masanori NAKAMOTO, Takashi KUSAGAWA, Masahiro SATO, Mitsumasa MIZUNO
  • Publication number: 20210229256
    Abstract: 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: Application
    Filed: March 20, 2019
    Publication date: July 29, 2021
    Inventors: Mitsumasa MIZUNO, Itaru MURUI, Atsushi NAKAMURA
  • Publication number: 20210149626
    Abstract: A control unit is adapted to perform a process related to an electric power tool, based on sound input to a microphone. The control unit performs a process related to the electric power tool, based on a result of subjecting input sound to a sound recognition process or a result of subjecting the sound to sound analysis. When a user operation switch is in an on state, the control unit does not perform a sound recognition process, and, when the user operation switch is in an off state, the control unit performs a sound recognition process. Further, when the electric power tool is not in a state of being gripped by the user, the control unit does not perform a sound recognition process, and, when the electric power tool is in a state of being gripped by the user, the control unit performs a sound recognition process.
    Type: Application
    Filed: March 20, 2019
    Publication date: May 20, 2021
    Inventors: Kazuo Dobashi, Itaru MURUI
  • Publication number: 20200313511
    Abstract: 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: Application
    Filed: March 24, 2020
    Publication date: October 1, 2020
    Inventors: Itaru Murui, Masari Muramatsu, Motoharu Muto, Kota Kitamura
  • Publication number: 20200280252
    Abstract: 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: Application
    Filed: June 15, 2018
    Publication date: September 3, 2020
    Inventors: Mitsumasa MIZUNO, Itaru MURUI, Satoshi KAJIYAMA, Hiroaki MURAKAMI, Akiko HONDA
  • Publication number: 20200023500
    Abstract: 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: Application
    Filed: November 30, 2017
    Publication date: January 23, 2020
    Inventors: Itaru MURUI, Hiroaki MURAKAMI, Mitsumasa MIZUNO, Akiko HONDA, Satoshi KAJIYAMA
  • Publication number: 20150312997
    Abstract: First ion generation means and second ion generation means are arranged in substantially parallel to each other and arranged along a flow direction of conveying air in this order from an upstream side of the conveying air, polarities of ions radiated from ion generation electrodes, which are respectively opposing, of the first ion generation means and the second ion generation means are reverse polarities, an air duct wall is arranged so as to separate each pair of positive and negative electrodes to be paired over the first ion generation means and the second ion generation means, and a high-voltage power source applies a voltage to the first ion generation means and the second ion generation means alternately.
    Type: Application
    Filed: November 25, 2013
    Publication date: October 29, 2015
    Inventor: Itaru MURUI