Patents by Inventor Yohei Kameda

Yohei Kameda 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: 20240421679
    Abstract: In the present rotor manufacturing method, when manufacturing a rotor including a rotor shaft, a permanent magnet held on the outer circumference of the rotor shaft via a resin, and a magnet reinforcing pipe formed in a cylindrical shape and covering the permanent magnet from the outer circumferential side, the liquid resin is filled between the rotor shaft and the permanent magnet, and the permanent magnet is broken and the magnet reinforcing pipe is expanded in diameter by the filling pressure of the resin.
    Type: Application
    Filed: July 8, 2022
    Publication date: December 19, 2024
    Inventors: Yohei KAMEDA, Yoshikazu MINEDA, Soichi NAKAYAMA
  • Patent number: 12113398
    Abstract: A stator core that is configured by stacking plural core plates and that is housed inside a case of a motor. The plural core plates include an elastic protrusion-equipped core plate provided with plural elastic protrusions arrayed in a circumferential direction. The elastic protrusions extend toward a radial direction outside from an outer peripheral portion of the elastic protrusion-equipped core plate and are bent in an axial direction. The stator core is supported by the case in a state in which the plural elastic protrusions are in contact with an inner peripheral face of the case and elastically flexed.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: October 8, 2024
    Assignee: NHK SPRING CO., LTD.
    Inventor: Yohei Kameda
  • Patent number: 12074486
    Abstract: A rotor includes a rotor core configured by laminated steel plates and a magnet insertion hole extending along an axial direction of the rotor core, with a resin interposed between a permanent magnet placed in the magnet insertion hole and an inner wall face of the magnet insertion hole. In a manufacturing method for this rotor, in a first process, the permanent magnet and the resin are integrated together to manufacture a resin-coated permanent magnet. Next, in a second process, the resin-coated permanent magnet is press-fitted into the magnet insertion hole. Next, in a third process, the post-second-process rotor core is heated to a temperature that is at least the temperature at which the resin softens. Next, in a fourth process, the post-third process rotor core is cooled.
    Type: Grant
    Filed: January 14, 2020
    Date of Patent: August 27, 2024
    Assignee: NHK SPRING CO., LTD.
    Inventors: Yohei Kameda, Yu Yoda
  • Publication number: 20240235287
    Abstract: A stator core that is configured by stacking plural core plates and that is housed inside a case of a motor. The plural core plates include an elastic protrusion-equipped core plate provided with plural elastic protrusions arrayed in a circumferential direction. The elastic protrusions extend toward a radial direction outside from an outer peripheral portion of the elastic protrusion-equipped core plate and are bent in an axial direction. The stator core is supported by the case in a state in which the plural elastic protrusions are in contact with an inner peripheral face of the case and elastically flexed.
    Type: Application
    Filed: October 1, 2020
    Publication date: July 11, 2024
    Inventor: Yohei KAMEDA
  • Publication number: 20240136868
    Abstract: A stator core that is configured by stacking plural core plates and that is housed inside a case of a motor. The plural core plates include an elastic protrusion-equipped core plate provided with plural elastic protrusions arrayed in a circumferential direction. The elastic protrusions extend toward a radial direction outside from an outer peripheral portion of the elastic protrusion-equipped core plate and are bent in an axial direction. The stator core is supported by the case in a state in which the plural elastic protrusions are in contact with an inner peripheral face of the case and elastically flexed.
    Type: Application
    Filed: September 30, 2020
    Publication date: April 25, 2024
    Inventor: Yohei KAMEDA
  • Publication number: 20220103029
    Abstract: A rotor includes a rotor core configured by laminated steel plates and a magnet insertion hole extending along an axial direction of the rotor core, with a resin interposed between a permanent magnet placed in the magnet insertion hole and an inner wall face of the magnet insertion hole. In a manufacturing method for this rotor, in a first process, the permanent magnet and the resin are integrated together to manufacture a resin-coated permanent magnet that is capable of being press-fitted into the magnet insertion hole. Next, in a second process, the resin-coated permanent magnet is press-fitted into the magnet insertion hole. Next, in a third process, the post-second-process rotor core is heated to a temperature that is at least the temperature at which the resin softens.
    Type: Application
    Filed: January 14, 2020
    Publication date: March 31, 2022
    Inventors: Yohei KAMEDA, Yu YODA
  • Patent number: 9570948
    Abstract: A magnet plate used for a rotor core of a motor, includes a magnetic pole portion being set between an outer peripheral edge of a body portion and a magnet slot and having a radial width being smaller than a radial sectional width of the permanent magnet, and a higher hardness portion being formed into a hook shape along an end corner of the magnet slot and have a smaller width than the radial sectional width of the permanent magnet.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: February 14, 2017
    Assignee: NHK Spring Co., Ltd.
    Inventors: Yohei Kameda, Kazuo Iwata, Yuji Araoka, Yoshiki Ono
  • Publication number: 20160065015
    Abstract: A magnet plate used for a rotor core of a motor, includes a magnetic pole portion being set between an outer peripheral edge of a body portion and a magnet slot and having a radial width being smaller than a radial sectional width of the permanent magnet, and a higher hardness portion being formed into a hook shape along an end corner of the magnet slot and have a smaller width than the radial sectional width of the permanent magnet.
    Type: Application
    Filed: April 15, 2014
    Publication date: March 3, 2016
    Applicant: NHK Spring Co., Ltd.
    Inventors: Yohei KAMEDA, Kazuo IWATA, Yuji ARAOKA, Yoshiki ONO
  • Publication number: 20150042199
    Abstract: A stator core includes an annular yoke portion and tooth portions, wherein an outer peripheral edge of the yoke portion is attached to an inner peripheral surface of a motor case. The yoke portion includes displacement portions displaced by receiving the radially-inward pressing force from the motor case, and deformation portions deformed according to the displacements of the displacement portions to generate tensile stress so as to form tensile stress regions through which magnetic flux passes between the tooth portions and the yoke portion or so as to counterbalance compression stress generated by the pressing force from the motor case. The displacement portions perform the displacements by attaching the yoke portion to the annular member with the interference.
    Type: Application
    Filed: February 7, 2013
    Publication date: February 12, 2015
    Inventors: Kazuo Iwata, Yohei Kameda
  • Publication number: 20150001985
    Abstract: Provided is a stator core for a motor capable of facilitating an assembly work and parts management without increasing the number of components while suppressing leakage of magnetic flux passing through a flange to a coil. A stator core has an annular yoke portion and tooth portions inwardly protruding from an inner periphery of the yoke portion in a radial direction, wherein at a front end of the tooth portion inwardly protruding in the radial direction, a flange portion is provided so as to face a coil wound around the tooth portion and wherein to the flange portion, a compressive residual stress portion M is provided.
    Type: Application
    Filed: February 14, 2013
    Publication date: January 1, 2015
    Inventors: Yohei Kameda, Kazuo Iwata, Ken Okura, Yoshiki Ono
  • Patent number: D828808
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: September 18, 2018
    Assignee: NHK Co., Ltd.
    Inventors: Yohei Kameda, Yoshiki Ono, Kazuhisa Matsumoto
  • Patent number: D828809
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: September 18, 2018
    Assignee: NHK Spring Co., Ltd.
    Inventors: Yohei Kameda, Yoshiki Ono, Kazuhisa Matsumoto