Patents by Inventor Yoshihiro Uchitani

Yoshihiro Uchitani 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).

  • Patent number: 10010149
    Abstract: A dryer includes a body portion arranged to hold a motor, a first tubular portion arranged to at least partially cover an outer circumferential portion of the body portion, and a second tubular portion arranged axially behind the first tubular portion, and arranged to at least partially cover the outer circumferential portion of the body portion. An outer circumferential joining portion included in the body portion is held between an axial rear edge portion of the first tubular portion and an axial front edge portion of the second tubular portion.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: July 3, 2018
    Assignee: NIDEC CORPORATION
    Inventors: Takamasa Yamashita, Yoshihiro Uchitani, Shingo Yoshino, Shigekatsu Matsuda
  • Patent number: 9980549
    Abstract: A hair dryer includes a fan motor, a heater unit, and a body case arranged to cover the fan motor and the heater unit, and arranged to extend in a front-rear direction around a central axis. The fan motor includes an impeller arranged to rotate about the central axis, and a motor arranged to rotate the impeller. The body case includes an intake case portion including an air inlet, a discharge case portion including an air outlet, and an admission case portion arranged between the air inlet and the air outlet, and including an admission inlet. The intake case portion includes a suction tube portion arranged to extend toward the admission inlet. The intake case portion and the admission case portion are arranged to together define an expansion chamber arranged between the admission inlet and the air inlet and radially outside of the suction tube portion and the admission inlet.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: May 29, 2018
    Assignee: NIDEC CORPORATION
    Inventors: Yuuichi Sakuma, Yoshihiro Uchitani, Shinichi Noda, Takamasa Yamashita
  • Patent number: 9634533
    Abstract: A stationary portion of a motor includes resin bodies including an inner resin portion and an outer resin portion. The inner resin portion is between a tooth and a coil and between the tooth and an insulator. The outer resin portion covers circumferentially outer sides and axially outer sides of the coil. The inner and outer resin portions are continuous with each other through a connecting resin portion. The insulator includes an opening portion extending along circumferential side surfaces of the tooth. The inner resin portion is in contact with the circumferential side surfaces of the tooth and a conducting wire in the opening portion. Heat generated in the coil is transferred to the tooth through the resin body. A path along which the heat is transferred from the coil to the tooth is secured, and dissipation of heat out of the motor is promoted.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: April 25, 2017
    Assignee: NIDEC CORPORATION
    Inventors: Yoshihiro Uchitani, Yuji Tanaka, Tomoyoshi Yokogawa
  • Patent number: 9531222
    Abstract: A stationary portion of a motor includes a stator core, insulators, and coils. The stator core includes a core back having an annular shape, and a plurality of teeth extending radially inward from the core back. A radially inner end portion of each tooth has a circumferential width substantially equal to or smaller than a circumferential width of a remaining portion of the tooth. The core back includes a protruding portion protruding radially inward between adjacent teeth, a cut extending radially outward from the protruding portion, and a through hole extending in an axial direction through the core back defined at a radially outer end portion of the cut. The protruding portion increases a radial dimension of the core back to achieve a reduction in magnetic reluctance in the vicinity of the cut.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: December 27, 2016
    Assignee: NIDEC CORPORATION
    Inventors: Yoshihiro Uchitani, Yuji Tanaka, Tomoyoshi Yokogawa
  • Publication number: 20160273831
    Abstract: A dryer includes a body portion arranged to hold a motor, a first tubular portion arranged to at least partially cover an outer circumferential portion of the body portion, and a second tubular portion arranged axially behind the first tubular portion, and arranged to at least partially cover the outer circumferential portion of the body portion. An outer circumferential joining portion included in the body portion is held between an axial rear edge portion of the first tubular portion and an axial front edge portion of the second tubular portion.
    Type: Application
    Filed: March 3, 2016
    Publication date: September 22, 2016
    Inventors: Takamasa YAMASHITA, Yoshihiro UCHITANI, Shingo YOSHINO, Shigekatsu MATSUDA
  • Publication number: 20160213123
    Abstract: A hair dryer includes a fan motor, a heater unit, and a body case arranged to cover the fan motor and the heater unit, and arranged to extend in a front-rear direction around a central axis. The fan motor includes an impeller arranged to rotate about the central axis, and a motor arranged to rotate the impeller. The body case includes an intake case portion including an air inlet, a discharge case portion including an air outlet, and an admission case portion arranged between the air inlet and the air outlet, and including an admission inlet. The intake case portion includes a suction tube portion arranged to extend toward the admission inlet. The intake case portion and the admission case portion are arranged to together define an expansion chamber arranged between the admission inlet and the air inlet and radially outside of the suction tube portion and the admission inlet.
    Type: Application
    Filed: December 16, 2015
    Publication date: July 28, 2016
    Inventors: Yuuichi SAKUMA, Yoshihiro UCHITANI, Shinichi NODA, Takamasa YAMASHITA
  • Patent number: 9130423
    Abstract: Magnets may be embedded in first recessed portions of a rotor core, and at least one stopper is each attached to an axial end of the rotor core. The rotor core may include second recessed portions each including a locking portion arranged to project inward therein. The stopper may include a base portion arranged to close the first recessed portions, and elastically deformable hook portions each arranged to be inserted into a separate one of the second recessed portions to be engaged with the locking portion. The rotor core may include first plates and second plates placed upon one another. Each first plate may include first locking elements each defining an opening, while each second plate may include second locking elements each defining a larger opening. The locking portions may be defined by arranging the second plates axially inward and placing the first plates upon the second plates.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: September 8, 2015
    Assignee: NIDEC CORPORATION
    Inventor: Yoshihiro Uchitani
  • Publication number: 20150008769
    Abstract: A stationary portion of a motor includes resin bodies including an inner and outer resin portion arranged between a tooth and a coil and between the tooth and an insulator. The outer resin portion covers circumferentially outer sides and axially outer sides of the coil. The inner and outer resin portions are continuous with each other through a connecting resin portion. The insulator includes an opening portion arranged to extend along circumferential side surfaces of the tooth. The inner resin portion is arranged to contact the circumferential side surfaces of the tooth and a conducting wire in the opening portion. Heat generated in the coil is transferred to the tooth through the resin body such that a large area of a path along which the heat is transferred from the coil to the tooth is secured.
    Type: Application
    Filed: September 14, 2012
    Publication date: January 8, 2015
    Applicant: NIDEC CORPORATION
    Inventors: Yoshihiro Uchitani, Yuji Tanaka, Tomoyoshi Yokogawa
  • Publication number: 20140346918
    Abstract: A stationary portion of a motor includes a stator core, insulators, and coils. The stator core includes a core back having an annular shape, and a plurality of teeth extending radially inward from the core back. A radially inner end portion of each tooth has a circumferential width substantially equal to or smaller than a circumferential width of a remaining portion of the tooth. The core back includes a protruding portion protruding radially inward between adjacent teeth, a cut extending radially outward from the protruding portion, and a through hole extending in an axial direction through the core back defined at a radially outer end portion of the cut. The protruding portion increases a radial dimension of the core back to achieve a reduction in magnetic reluctance in the vicinity of the cut.
    Type: Application
    Filed: September 14, 2012
    Publication date: November 27, 2014
    Applicant: NIDEC CORPORATION
    Inventors: Yoshihiro Uchitani, Yuji Tanaka, Tomoyoshi Yokogawa
  • Publication number: 20140091667
    Abstract: In an armature, a plurality of teeth extending from an annular core back each include a projection portion arranged to extend in a circumferential direction from a circumferential side surface of the tooth. Insulators, each of which is attached to the stator core and is arranged to cover at least a portion of a separate one of the teeth, include an insulator contact surface arranged to be in contact with the projection portion. A portion of the projection portion and the insulator contact surface are arranged to be in contact with each other.
    Type: Application
    Filed: August 20, 2013
    Publication date: April 3, 2014
    Applicant: Nidec Corporation
    Inventors: Yoshihiro UCHITANI, Machiko FUKUSHIMA, Hironori RENGI
  • Publication number: 20130181564
    Abstract: Magnets may be embedded in first recessed portions of a rotor core, and at least one stopper is each attached to an axial end of the rotor core. The rotor core may include second recessed portions each including a locking portion arranged to project inward therein. The stopper may include a base portion arranged to close the first recessed portions, and elastically deformable hook portions each arranged to be inserted into a separate one of the second recessed portions to be engaged with the locking portion. The rotor core may include first plates and second plates placed upon one another. Each first plate may include first locking elements each defining an opening, while each second plate may include second locking elements each defining a larger opening. The locking portions may be defined by arranging the second plates axially inward and placing the first plates upon the second plates.
    Type: Application
    Filed: September 29, 2011
    Publication date: July 18, 2013
    Applicant: NIDEC CORPORATION
    Inventor: Yoshihiro Uchitani
  • Publication number: 20110018384
    Abstract: In a motor, a raised portion arranged to project toward a rotor magnet is provided on an opposed surface of each tooth portion. This raised portion provided on an opposed surface of each tooth portion. This raised portion is provided at a substantial middle of the opposed surface in a circumferential direction. This allows a waveform of a cogging torque generated by the raised portions and a fundamental of a waveform of a cogging torque generated by slot openings to be substantially in opposite phases. Cogging torque generated by the slot openings can be thereby reduced, because of the cogging torque generated by the raised portion.
    Type: Application
    Filed: March 26, 2009
    Publication date: January 27, 2011
    Applicant: NIDEC CORPORATION
    Inventors: Takashi Kenjo, Nakaba Kataoka, Yoshihiro Uchitani, Yoshiaki Yamashita
  • Patent number: 7588444
    Abstract: A busbar unit for attachment to on an electric-motor armature is furnished with: busbars having terminals for supplying drive current to the armature; a plurality of connecting pins each of approximately J-shaped metal; a busbar holder retaining the busbars and the connecting pins; and a circuit board disposed on the upper side of the busbar holder, and in which a sealant injection port and an air-bleeding hole are formed.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: September 15, 2009
    Assignee: Nidec Corporation
    Inventors: Nakaba Kataoka, Yoshihiro Uchitani, Hidehiro Haga, Shuhei Yamashita, Masato Aono
  • Publication number: 20070178723
    Abstract: A busbar unit for attachment to on an electric-motor armature is furnished with: busbars having terminals for supplying drive current to the armature; a plurality of connecting pins each of approximately J-shaped metal; a busbar holder retaining the busbars and the connecting pins; and a circuit board disposed on the upper side of the busbar holder, and in which a sealant injection port and an air-bleeding hole are formed.
    Type: Application
    Filed: February 1, 2007
    Publication date: August 2, 2007
    Applicant: Nidec Corporation
    Inventors: Nakaba Kataoka, Yoshihiro Uchitani, Hidehiro Haga, Shuhei Yamashita, Masato Aono
  • Publication number: 20070145838
    Abstract: A housing (11) including a bearing retainer is formed as one member. One pair of bearings is arranged in the bearing retainer and the shaft is rotatably supported by the pair of bearings. The region for retaining the bearing is reduced in the axis direction and thus the motor is miniaturized by supporting the rotor including the shaft by a so-called cantilever structure.
    Type: Application
    Filed: December 7, 2006
    Publication date: June 28, 2007
    Applicant: NIDEC CORPORATION
    Inventors: Yoshihiro Uchitani, Koji Isogai, Hidehiro Haga