Patents by Inventor Takaharu Nakatsuka

Takaharu Nakatsuka 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: 20220286024
    Abstract: A power tool includes a motor including a rotor and a stator disposed around the rotor; an output shaft to which a tip tool is attached and that is rotated by power generated by the motor; a torque sensor unit that is disposed between the stator and the output shaft in a front-rear direction parallel to a rotation axis of the motor and that is coupled to the output shaft; an amplifier circuit that amplifies a detection signal of the torque sensor unit; and a housing including a motor housing part for housing the motor and a grip part. The torque sensor unit is disposed forward of the stator. The grip part is disposed downward of the motor housing part. The amplifier circuit is disposed upward of the grip part. The amplifier circuit is disposed forward of a rear end part of the stator.
    Type: Application
    Filed: July 27, 2020
    Publication date: September 8, 2022
    Applicant: MAKITA CORPORATION
    Inventors: Takaharu NAKATSUKA, Yuta IZUTSU
  • Publication number: 20220184792
    Abstract: A torque sensor is less likely to lower detection accuracy. A screwing machine includes a motor including a stator and a rotor rotatable about a rotation axis, a gear case, a planetary gear, an internal gear connected to the planetary gear, a torque sensor including a front plate coupled to the internal gear, a rear plate supported by the gear case, a hollow portion located between the front plate and the rear plate, and a strain gauge fixed to the hollow portion, a bearing located between the stator and the rear plate and supporting at least a part of the rotor, and a bearing box surrounding the bearing and supporting the bearing.
    Type: Application
    Filed: October 29, 2021
    Publication date: June 16, 2022
    Applicant: MAKITA CORPORATION
    Inventors: Takaharu NAKATSUKA, Yoshihiro ITO
  • Publication number: 20220045579
    Abstract: A screwing machine includes a motor, an output shaft, a twist portion, a plate portion, a strain gauge, an amplification circuit. The output shaft is driven by the motor. To the output shaft, a bit is attachable. The twist portion is hollow. To the twist portion, torque applied to the output shaft is transmitted through a transmission element. The output shaft is configured to be indirectly twisted by the torque applied to the output shaft. The plate portion is integrally formed with the twist portion. The strain gauge is disposed on the twist portion. The amplification circuit is disposed on the plate portion. To the amplification circuit, a signal from the strain gauge is input.
    Type: Application
    Filed: June 29, 2021
    Publication date: February 10, 2022
    Applicants: MAKITA CORPORATION, MINEBEA MITSUMI INC.
    Inventors: Takaharu NAKATSUKA, Yuta IZUTSU, Kotaro EGUCHI, Kui LI
  • Patent number: 7593516
    Abstract: An electronic apparatus includes: a memory for storing voice data of an operation explanation related to a function of the electronic apparatus; a speaker for outputting operation explanatory voice based upon the voice data stored in the memory; a push-button for instructing an execution of the function with respect to the electronic apparatus; and a control unit for turning ON, or flickering the push-button when the operation explanatory voice is being outputted from the speaker.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: September 22, 2009
    Assignee: Panasonic Corporation
    Inventors: Nobuaki Murai, Takaharu Nakatsuka, Kouki Hamada, Saori Masuda
  • Publication number: 20060082835
    Abstract: An electronic apparatus includes: a memory for storing voice data of an operation explanation related to a function of the electronic apparatus; a speaker for outputting operation explanatory voice based upon the voice data stored in the memory, a push-button for instructing an execution of the function with respect to the electronic apparatus; and a control unit for turning ON, or flickering the push-button when the operation explanatory voice is being outputted from the speaker.
    Type: Application
    Filed: October 5, 2005
    Publication date: April 20, 2006
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Nobuaki Murai, Takaharu Nakatsuka, Kouki Hamada, Saori Masuda