Patents by Inventor Takashi Kusagawa

Takashi Kusagawa 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
  • Patent number: 11285586
    Abstract: An electric power tool includes a bearing retainer that retains a bearing for supporting a motor shaft, a transmission mechanism that transmits a rotational output of a motor to a front-end tool and a rotating body attached to an end of the motor shaft. The bearing retainer includes an extension that extends in a direction of axial line from an end face position on the bearing. At least a part of the rotating body is provided in front of a rear end of the extension.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: March 29, 2022
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Masari Muramatsu, Takashi Kusagawa, Fumiaki Sawano, Hidenori Shimizu
  • Patent number: 11235444
    Abstract: A secondary hammer support structure in a rotary impact tool is structured such that a plurality of steel balls are disposed between a secondary hammer and a retaining member. The plurality of steel balls are arranged between the first retaining groove of the secondary hammer and the second retaining groove of the retaining member. The retaining member is formed as a member separate from the spindle and has a retaining surface for retaining steel balls and a mounting surface mounted to the spindle so as not be rotatable. The mounting surface of the retaining member is mounted to a front member of a carrier.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: February 1, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Masari Muramatsu, Takashi Kusagawa
  • 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: 20210252681
    Abstract: 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: Application
    Filed: June 26, 2019
    Publication date: August 19, 2021
    Inventors: Itaru MURUl, Mitsumasa MlZUNO, Hiroaki MURAKAMI, Takashi KUSAGAWA, Masahiro SATO, Masanori NAKAMOTO, Akiko HONDA
  • Publication number: 20190061117
    Abstract: An electric power tool includes a bearing retainer that retains a bearing for supporting a motor shaft, a transmission mechanism that transmits a rotational output of a motor to a front-end tool and a rotating body attached to an end of the motor shaft. The bearing retainer includes an extension that extends in a direction of axial line from an end face position on the bearing. At least a part of the rotating body is provided in front of a rear end of the extension.
    Type: Application
    Filed: August 28, 2018
    Publication date: February 28, 2019
    Inventors: Masari MURAMATSU, Takashi KUSAGAWA, Fumiaki SAWANO, Hidenori SHIMIZU
  • Publication number: 20180272510
    Abstract: A secondary hammer support structure in a rotary impact tool is structured such that a plurality of steel balls are disposed between a secondary hammer and a retaining member. The plurality of steel balls are arranged between the first retaining groove of the secondary hammer and the second retaining groove of the retaining member. The retaining member is formed as a member separate from the spindle and has a retaining surface for retaining steel balls and a mounting surface mounted to the spindle so as not be rotatable. The mounting surface of the retaining member is mounted to a front member of a carrier.
    Type: Application
    Filed: March 13, 2018
    Publication date: September 27, 2018
    Inventors: Masari Muramatsu, Takashi Kusagawa