Patents by Inventor Keiichi Hosoi

Keiichi Hosoi 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: 20230296103
    Abstract: A motor and a fan device are provided. The motor includes a motor bracket; a conductive shaft fixed to a front surface side of the motor bracket; a rotor rotatably supported on the shaft; a stator fixed to the front surface side of the motor bracket inside the rotor and wound with a plurality of coils for generating a magnetic field to rotate the rotor; a substrate, a front surface thereof mounted with a driver circuit for controlling magnetic field generation by the coils; and a driver case fixed to a rear surface side of the motor bracket and forming an accommodation space accommodating the substrate between itself and the motor bracket. A positive wiring of the driver circuit is mounted outside a region on the substrate overlapping the shaft when the motor is viewed from an axial direction of the shaft.
    Type: Application
    Filed: February 4, 2023
    Publication date: September 21, 2023
    Applicant: MITSUBA Corporation
    Inventors: TAKAHIKO OGANE, SATOSHI TAKEDA, HIROKAZU TAKADA, Satoshi NAGAMOTO, KEIICHI HOSOI
  • Publication number: 20230299640
    Abstract: The motor includes a shaft fixed to a front surface side of a motor bracket; a rotor rotatably supported on the shaft; a stator wound with coils for generating a magnetic field to rotate the rotor; a substrate, a front surface of which mounted with a driver circuit for controlling magnetic field generation by the coils; a conductive driver case forming an accommodation space accommodating the substrate between itself and the motor bracket; a terminal disposed on a front surface side of the substrate facing the motor bracket and connecting the driver circuit and the coils; a conductive fixing member penetrating the substrate from a rear surface side and fixing the terminal in contact with the substrate; and an insulating driver insulator disposed on a rear surface side of the substrate to surround the fixing member, and protruding to a position closer to the driver case than the fixing member.
    Type: Application
    Filed: December 27, 2022
    Publication date: September 21, 2023
    Applicant: MITSUBA Corporation
    Inventors: SATOSHI NAGAMOTO, KEIICHI HOSOI
  • Patent number: 10720811
    Abstract: An electric motor for vehicle including a stator; a stator support member; a rotation shaft; a rotor including a bottom wall and a peripheral wall, in which the peripheral wall is provided with a magnet and the bottom wall is configured to be combined with the rotation shaft; and a bearing holder including a tube part, and a water drip hole is formed on a vertically lower side of the tube part, the stator support member being provided with a bearing holder insertion part including a boss part into which the tube part is configured to be inserted, wherein a water drain structure configured to drain a water drop from the water drip hole is provided along a circumferential direction of an inner circumferential surface of the boss part in a vertically lower area of the inner circumferential surface of the boss part.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: July 21, 2020
    Assignee: Mitsuba Corporation
    Inventors: Keiichi Hosoi, Shuichi Tsujiyama, Mikio Kawamura, Shingo Watanabe, Hiroki Masuyama, Takeshi Tonegawa, Minoru Ota
  • Publication number: 20180019635
    Abstract: An electric motor for vehicle including a stator; a stator support member; a rotation shaft; a rotor including a bottom wall and a peripheral wall, in which the peripheral wall is provided with a magnet and the bottom wall is configured to be combined with the rotation shaft; and a bearing holder including a tube part, and a water drip hole is formed on a vertically lower side of the tube part, the stator support member being provided with a bearing holder insertion part including a boss part into which the tube part is configured to be inserted, wherein a water drain structure configured to drain a water drop from the water drip hole is provided along a circumferential direction of an inner circumferential surface of the boss part in a vertically lower area of the inner circumferential surface of the boss part.
    Type: Application
    Filed: May 27, 2016
    Publication date: January 18, 2018
    Inventors: Keiichi Hosoi, Shuichi Tsujiyama, Mikio Kawamura, Shingo Watanabe, Hiroki Masuyama, Takeshi Tonegawa, Minoru Ota
  • Patent number: 9249788
    Abstract: This electric fan has a rotation shaft that is provided rotatably with respect to a stator, a rotor yoke provided on the rotation shaft and formed in a bottomed cylindrical shape so as to cover the stator from a front surface, and a bracket that fixes the stator to a fan shroud and is formed so as to cover a rear surface of the stator, with a fan body provided so as to integrally rotate with the rotation shaft and the rotor yoke. The fan body has a fan boss formed in a bottomed cylindrical shape so as to cover the rotor yoke from a front surface, and a plurality of blades that is provided protruding radially from an outer circumferential surface of the fan boss. A first labyrinth portion is provided between an opening portion of the fan boss and the fan shroud.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: February 2, 2016
    Assignee: Mitsuba Corporation
    Inventors: Hiroshi Kimura, Hiroki Masuyama, Keiichi Hosoi, Shinya Saito
  • Publication number: 20130287605
    Abstract: This electric fan has a rotation shaft that is provided rotatably with respect to a stator, a rotor yoke provided on the rotation shaft and formed in a bottomed cylindrical shape so as to cover the stator from a front surface, and a bracket that fixes the stator to a fan shroud and is formed so as to cover a rear surface of the stator, with a fan body provided so as to integrally rotate with the rotation shaft and the rotor yoke. The fan body has a fan boss formed in a bottomed cylindrical shape so as to cover the rotor yoke from a front surface, and a plurality of blades that is provided protruding radially from an outer circumferential surface of the fan boss. A first labyrinth portion is provided between an opening portion of the fan boss and the fan shroud.
    Type: Application
    Filed: January 10, 2012
    Publication date: October 31, 2013
    Applicant: MITSUBA CORPORATION
    Inventors: Hiroshi Kimura, Hiroki Masuyama, Keiichi Hosoi, Shinya Saito
  • Patent number: 8555484
    Abstract: A method for manufacturing a yoke includes forming a through-hole that is open in a yoke bottom surface and a cylindrical bearing support portion by burring an edge of the through-hole using a burring punch, wherein the burring punch is located on a base end side at a distance from a cylinder front-end portion of the bearing support portion so as to form a ring-shaped flange portion inclined toward an inner radial side on the cylinder front-end portion of the bearing support portion.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: October 15, 2013
    Assignee: Mitsuba Corporation
    Inventors: Tsugio Yokoo, Keiichi Hosoi
  • Patent number: 7898125
    Abstract: In a fan motor 1 for a vehicle, when opening a vent hole 11 in a cylinder bottom portion 2a of a yoke 2 of the fan motor 1, this is performed so that the opening part cannot be visually observed when the vent hole 11 is viewed head on. The vent hole 11 is formed by dividing the same at a laterally long dividing line so that, at a dividing line X having an angular shape whose left-right direction central portion intrudes into the side of a vent hole upper half portion 12, the upper half portion 12 has a spherical shape that bulges out to the outside of a bottom surface as it is further at the lower side and thus has an inside and outside staggered form with respect to a lower half portion 13.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: March 1, 2011
    Assignee: Mitsuba Corporation
    Inventors: Keiichi Hosoi, Tsugio Yokoo, Masato Iwata
  • Patent number: 7821174
    Abstract: A rotating electric machine includes a shaft and an armature with a core that includes a shaft hole. The core includes a plurality of core materials that are laminated. When pressing in and fixing the shaft to the shaft hole, the shaft hole is applied with an ironing process in advance in order to rectify a cylindrical hole shape of the shaft hole.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: October 26, 2010
    Assignee: Mitsuba Corporation
    Inventors: Masaaki Kimura, Tsugio Yokoo, Keiichi Hosoi, Toshikazu Terada, Yoichi Yamazaki
  • Publication number: 20100186218
    Abstract: A method for manufacturing a yoke includes forming a through-hole that is open in a yoke bottom surface and a cylindrical bearing support portion by burring an edge of the through-hole using a burring punch, wherein the burring punch is located on a base end side at a distance from a cylinder front-end portion of the bearing support portion so as to form a ring-shaped flange portion inclined toward an inner radial side on the cylinder front-end portion of the bearing support portion.
    Type: Application
    Filed: March 15, 2010
    Publication date: July 29, 2010
    Applicant: Mitsuba Corporation
    Inventors: Tsugio Yokoo, Keiichi Hosoi
  • Publication number: 20090115281
    Abstract: A rotating electric machine includes a shaft and an armature with a core that includes a shaft hole. The core includes a plurality of core materials that are laminated. When pressing in and fixing the shaft to the shaft hole, the shaft hole is applied with an ironing process in advance in order to rectify a cylindrical hole shape of the shaft hole.
    Type: Application
    Filed: June 5, 2006
    Publication date: May 7, 2009
    Applicant: Mitsuba Corporation
    Inventors: Masaaki Kimura, Tsugio Yokoo, Keiichi Hosoi, Toshikazu Terada, Yoichi Yamazaki
  • Publication number: 20090085424
    Abstract: A rotating electric machine includes a bearing; a rotating shaft supported via the bearing; and a yoke with a bearing support portion formed on a yoke bottom surface. The bearing support portion houses the bearing, and on a cylinder front-end portion of the bearing support portion, integrally formed is a ring-shaped flange portion that is inclined toward an inner radial side so as to prevent the bearing from coming off one end side.
    Type: Application
    Filed: May 12, 2006
    Publication date: April 2, 2009
    Applicant: MITSUBA CORPORATION
    Inventors: Tsugio Yokoo, Keiichi Hosoi
  • Publication number: 20090015082
    Abstract: In a fan motor 1 for a vehicle, when opening a vent hole 11 in a cylinder bottom portion 2a of a yoke 2 of the fan motor 1, this is performed so that the opening part cannot be visually observed when the vent hole 11 is viewed head on. The vent hole 11 is formed by dividing the same at a laterally long dividing line so that, at a dividing line X having an angular shape whose left-right direction central portion intrudes into the side of a vent hole upper half portion 12, the upper half portion 12 has a spherical shape that bulges out to the outside of a bottom surface as it is further at the lower side and thus has an inside and outside staggered form with respect to a lower half portion 13.
    Type: Application
    Filed: May 19, 2006
    Publication date: January 15, 2009
    Applicant: Mitsuba Corporation
    Inventors: Keiichi Hosoi, Tsugio Yokoo, Masato Iwata