Patents by Inventor Akihiro Yamamura

Akihiro Yamamura 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: 20200292732
    Abstract: The lens unit includes a first lens array including a plurality of first lens elements each of which has a first optical axis and which are arranged in an arrangement direction perpendicular to the first optical axis. A second lens array includes a plurality of second lens elements each of which has a second optical axis and which are arranged in the arrangement direction while facing the first lens elements. The second lens array is in a positional relationship relative to the first lens array such that the second lens array is rotated about a virtual line perpendicular to both the first optical axis and the arrangement direction as the rotational axis by 180 degrees. The optical axes of the lens elements located at the substantially centers of the lens arrays in the arrangement direction are arranged to substantially coincide with each other.
    Type: Application
    Filed: February 12, 2020
    Publication date: September 17, 2020
    Inventors: Masamitsu NAGAMINE, Ren NAKAMICHI, Akihiro YAMAMURA
  • Patent number: 10666111
    Abstract: This invention is concerning a rotary electric machine 1, this electric motor 1 being provided with an inner cylinder 2, a rotor 3 provided so as to be rotatable inside the inner cylinder 2, a stator 4 fixed to the inner cylinder 2 and separated via a gap from an outer periphery of the rotor 3, and an outer cylinder 8 that covers an entire periphery of the inner cylinder 2 and forms a space 15, which serves as a coolant passage, in conjunction with the inner cylinder 2, wherein both ends of the inner cylinder 2 and the outer cylinder 8 in an axial direction are fixed to each other by cylinder welding portions 9 formed by welding. Accordingly, a rotary electric machine that is small and light can be obtained at low cost.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: May 26, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naoki Ohashi, Shoichiro Nishitani, Keisuke Murase, Akihiro Yamamura
  • Patent number: 10644556
    Abstract: Provided is in an armature coil formed by arranging a plurality of coil conductors on a lower metal die having a tapered groove that is narrower toward an inner side. The coils are pressed using an upper metal die having an end portion narrower than the width of the groove. The coils are formed in a substantially trapezoidal shape which gets narrower toward the radially inner side and the cross-sectional areas of the plurality of the coil conductors in the slot are each substantially the same and the circumferential width thereof is formed narrower as the coil conductor is arranged toward the radially inner side; and one coil conductor is formed in a convex shape and another coil conductor is formed in a concave shape along the convex shape.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: May 5, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koji Tamura, Shuichi Tamura, Akihiro Yamamura, Issei Doi, Hiroyuki Matsuo, Yasukazu Nishimura, Sachiko Kawasaki, Akihiko Mori
  • Publication number: 20200094486
    Abstract: The present invention is provided with: an insulation holder formed of a thermoplastic resin material and having a first opening; a wire connection ring formed of a thermoplastic resin material and having a second opening; and a joining component inserted astride in the first opening and the second opening, the joining component being formed of a metal material having a higher melting point than those of the thermoplastic resin materials, the joining component having a higher stiffness than those of the insulation holder and the wire connection ring, wherein a welded part is formed by welding in at least a part of an area where each of the insulation holder and the wire connection ring has contact with the joining component.
    Type: Application
    Filed: November 27, 2019
    Publication date: March 26, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yoshiki KUWAHARA, Ryuichi KITORA, Akihiro YAMAMURA, Shogo OKAMOTO, Masashi NAKAMURA, Shinichiro YOSHIDA
  • Patent number: 10591842
    Abstract: Provided are a lens array, a lens unit, an exposure device, an LED head, and an image forming apparatus. The lens array includes a plurality of lenses arranged so as to form an array. Each of the plurality of lenses is configured so that a contour focal length which is a focal length of a ray incident on a first position separate from an optical axis is longer than a paraxial focal length which is a focal length of a ray incident on a second position in the vicinity of the optical axis.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: March 17, 2020
    Assignee: Oki Data Corporation
    Inventor: Akihiro Yamamura
  • Patent number: 10576690
    Abstract: The present invention is provided with: an insulation holder formed of a thermoplastic resin material and having a first opening; a wire connection ring formed of a thermoplastic resin material and having a second opening; and a joining component inserted astride in the first opening and the second opening, the joining component being formed of a metal material having a higher melting point than those of the thermoplastic resin materials, the joining component having a higher stiffness than those of the insulation holder and the wire connection ring, wherein a welded part is formed by welding in at least a part of an area where each of the insulation holder and the wire connection ring has contact with the joining component.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: March 3, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yoshiki Kuwahara, Ryuichi Kitora, Akihiro Yamamura, Shogo Okamoto, Masashi Nakamura, Shinichiro Yoshida
  • Patent number: 10498202
    Abstract: The manufacturing method for a rotor includes steps of: applying an adhesive to a first surface of a magnet material member that becomes a permanent magnet after magnetization, the adhesive being applied such that a total thickness of the magnet material member and the adhesive is less than a radial width of a magnet insertion aperture; disposing a rotor core such that an axial direction thereof is horizontal, and inserting the magnet material member into a magnet insertion aperture that is positioned vertically uppermost among the magnet insertion apertures so as to orient the adhesive vertically upward; positioning each of the magnet material members by pressing the magnet material member against an inner wall surface on an outer circumferential side of the magnet insertion aperture after inserting the magnet material member into each of the magnet insertion apertures; and curing the adhesive after the magnet material member is positioned.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: December 3, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hirohisa Yokota, Akihiro Yamamura, Yoshinobu Sugimoto, Shinji Sano
  • Patent number: 10491059
    Abstract: While lamination of steel sheets to be included in a stator core having a plurality of tooth portions is performed through swaging at yoke portions and through swaging at tooth portions, the stator core is formed in such a way as to include the tooth portion having a portion that is pressed into another steel sheet through swaging and the tooth portion having no portion that is pressed into another steel sheet through swaging.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: November 26, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tadashi Murakami, Naomi Kikuchi, Atsushi Sakaue, Tatsuro Hino, Akihiro Yamamura, Shogo Okamoto, Shinji Nishimura, Masaya Inoue
  • Publication number: 20190280543
    Abstract: In an armature coil according to the present invention and, more particularly, in an armature coil including a plurality of coil conductors wound around a plurality of slots which are formed in a stator core and opened on the radially inner side, the circumferential width of the plurality of the coil conductors is formed in a substantially trapezoidal shape which gets narrower toward the radially inner side and the cross-sectional areas of the plurality of the coil conductors in the slot are each substantially the same and the circumferential width thereof is formed narrower as the coil conductor is arranged toward the radially inner side; and one coil conductor is formed in a convex shape and another coil conductor is formed in a concave shape along the convex shape.
    Type: Application
    Filed: May 24, 2019
    Publication date: September 12, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Koji TAMURA, Shuichi TAMURA, Akihiro YAMAMURA, Issei DOI, Hiroyuki MATSUO, Yasukazu NISHIMURA, Sachiko KAWASAKI, Akihiko MORI
  • Publication number: 20190257983
    Abstract: A lens unit includes a first lens array including first lenses arranged in at least two lines; a second lens array including second lenses arranged in an arrangement relationship corresponding to the first lens array, the second lenses respectively facing the first lenses, the second lens array being arranged to face the first lens array so that each pair of the first and second lenses has a common optical axis; and a first light blocking member arranged between the first lens array and the second lens array and having first openings each being arranged to face the pair of the first and second lenses in a direction of the optical axis. An interval PXL from an array center position between two adjacent lines to the optical axis and an interval PXS from the array center position to an opening center of the first opening satisfy PXL<PXS.
    Type: Application
    Filed: February 19, 2019
    Publication date: August 22, 2019
    Applicant: Oki Data Corporation
    Inventor: Akihiro YAMAMURA
  • Patent number: 10356270
    Abstract: A lens unit according to one or more embodiments includes a lens plate member including a plurality of lenses arranged in a first direction; and a light block member provided facing the lens plate member and including a plurality of opening portions arranged in the first direction, the opening portions being provided in one-to-one correspondence with the lenses. A first positioning portion is formed at a first position in first direction of each of the lens plate member and the light block member. The first positioning portion of the lens plate member and the first positioning portion of the light block member align with each other and continuously extend in a second direction along an optical axis direction of the lenses.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: July 16, 2019
    Assignee: Oki Data Corporation
    Inventor: Akihiro Yamamura
  • Patent number: 10338279
    Abstract: A lens array includes a plurality of lenses arranged in at least two rows parallel with each other. The plurality of lenses are arranged in a first direction in each row. Each of the plurality of lenses allows light to pass in a second direction. An arrangement center is defined at a center position between the two rows in a third direction perpendicular to both of the first direction and the second direction. Each of the plurality of lenses includes an incident surface and an emission surface. A surface apex of the emission surface is displaced with respect to a surface apex of the incident surface in a direction away from the arrangement center in the third direction.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: July 2, 2019
    Assignee: Oki Data Corporation
    Inventor: Akihiro Yamamura
  • Patent number: 10333360
    Abstract: An iron core member has: first divided yoke portions; second divided yoke portions alternately arranged with the first divided yoke portions; a first tooth portion extending from one circumferential end of each first divided yoke portion, a second tooth portion extending from the other circumferential end; a third tooth portion extending from one circumferential end of the second divided yoke portion on the second tooth portion side, and a fourth tooth portion extending from the other circumferential end. A tooth end portion of the first tooth portion and a tooth end portion of the adjacent fourth tooth portion are integrally joined at a first tooth end joint portion, and a tooth end portion of the second tooth portion and a tooth end portion of the adjacent third tooth portion are integrally joined at a second tooth end joint portion, thereby providing one continuous sheet of the core member.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: June 25, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Tatsuro Hino, Akira Hashimoto, Masaya Inoue, Akihiro Yamamura, Shogo Okamoto, Atsushi Sakaue, Hironori Tsuiki
  • Publication number: 20190169768
    Abstract: A member for an apparatus for manufacturing a semiconductor single crystal having long product life and a tantalum carbide coated carbon material are provided. The tantalum carbide coated carbon material according to the present invention is a tantalum carbide coated carbon material in which at least a part of a surface of a carbon base material is coated with a tantalum carbide coated film containing tantalum carbide as a main component, in which in the tantalum carbide coated film, an intensity of an X-ray diffraction line corresponding to a plane with respect to an out-of-plane direction is larger than intensities of X-ray diffraction lines corresponding to other crystal planes, and the intensity ratio is 60% or more with respect to a sum of intensities of X-ray diffraction lines corresponding to all crystal planes.
    Type: Application
    Filed: December 3, 2018
    Publication date: June 6, 2019
    Inventors: Chikara MORI, Waichi YAMAMURA, Shoji KANO, Akihiro HIRATE
  • Patent number: 10298083
    Abstract: A stator includes multiple bus bars formed in an annular shape and laminated in a radial direction and an insulation member covering both radial side surfaces and both axial end faces of each bus bar, and the insulation member contains a sheet-like insulation member covering both radial side surfaces and the axial end face of each bus bar.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: May 21, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shogo Okamoto, Masashi Nakamura, Akihiro Yamamura, Yasuhiro Hayasaka, Sho Nakano, Yoshiaki Kitta, Masaya Inoue
  • Patent number: 10263486
    Abstract: A plurality of coil groups are each configured by connecting a tip portion of a first conductor terminal and a tip portion of a second conductor terminal that is subject to connection therewith using a connecting conductor, and the connecting conductors include: a pair of connecting portions that are respectively disposed so as to contact the tip portion of the first conductor terminal and the tip portion of the second conductor terminal that is subject to connection therewith in a circumferential direction of the tip portions so as to be parallel to the tip portions, and that are joined together with the tip portions; and a linking portion that links the pair of connecting portions.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: April 16, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masashi Nakamura, Akihiro Yamamura, Shinkichi Sawa, Masaya Inoue
  • Publication number: 20190094747
    Abstract: Provided are a lens array, a lens unit, an exposure device, an LED head, and an image forming apparatus. The lens array includes a plurality of lenses arranged so as to form an array. Each of the plurality of lenses is configured so that a contour focal length which is a focal length of a ray incident on a first position separate from an optical axis is longer than a paraxial focal length which is a focal length of a ray incident on a second position in the vicinity of the optical axis.
    Type: Application
    Filed: September 12, 2018
    Publication date: March 28, 2019
    Applicant: Oki Data Corporation
    Inventor: Akihiro YAMAMURA
  • Patent number: 10175604
    Abstract: A lens unit includes a first lens array including a plurality of first lens elements. The first lens array satisfies D1?0.25·P1 where P1 is a pitch in a first direction between optical axes of adjacent ones of the first lens elements, and D1 is a displacement amount that is an absolute value of a difference between a first length WE1 from a center position of the first lens array to an end position of the first lens array in the first direction at a first temperature, and a second length WE2 from the center position of the first lens array to the end position of the first lens array at a second temperature higher than the first temperature by 30° C.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: January 8, 2019
    Assignee: Oki Data Corporation
    Inventor: Akihiro Yamamura
  • Patent number: 10075036
    Abstract: The hole diameter of a shaft through hole formed in the rotor core is changed in the axial direction, thereby forming a concave portion whose hole diameter is large and a convex portion whose hole diameter is small in the inner circumferential surface of the shaft through hole; the convex portion is arranged at opening portions on both ends of the shaft through hole; a shaft having ridge-shaped convex portions on a press-fitting portion is press-fitted into the shaft through hole to assemble; the number of points of the concave portion is equal to or more than two; and respective diameter dimensions of the concave portion, the convex portion, and the shaft are set to be the diameter of a main body of the shaft<the diameter of the convex portion<the diameter of ridge-shaped convex portions of the shaft<the diameter of the concave portion.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: September 11, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akihiko Morikawa, Kazuhisa Takashima, Toshihiro Matsunaga, Masayuki Miyaoka, Akihiro Yamamura, Hiroki Maeda
  • Patent number: 10063118
    Abstract: The rotary electric machine includes concentrated winding coil that is configured by winding a conductor wire around a tooth for multiple laps so as to pass through a concave space that is formed by trunk portions and first and second flange portions of first and second insulators, a crossover points of the conductor wire being formed on a coil end of the concentrated winding coil that is positioned above the first insulator, slot-housed portions of the concentrated winding coil that are positioned on two circumferential sides of the tooth being configured such that the conductor wire is arranged in a staggered stacking pattern in multiple rows and in multiple layers, and a varnish being applied to the coil end that is positioned above the first insulator.
    Type: Grant
    Filed: April 8, 2013
    Date of Patent: August 28, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shinichiro Yoshida, Michiya Yasui, Toshiyuki Sugai, Shuichi Tamura, Yuki Yamamoto, Masaya Inoue, Akihiro Yamamura