Patents by Inventor Masashi Kitamura

Masashi Kitamura 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: 7453179
    Abstract: The stator core of a motor comprises an annular back core, and a plurality of tees created separately from the back core and secured onto the inner periphery of the back core. A stator coil is wound on each of the tees by a distributed or concentrated winding method. The stator core and stator coil are formed by molding.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: November 18, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Toshiyuki Innami, Mitsuaki Mirumachi, Osamu Koizumi, Masamichi Yagai, Masashi Kitamura, Takashi Ishigami
  • Publication number: 20080205693
    Abstract: A monitoring and operation image integrating system include: a display signal synthesizing unit to which a display signal from a plurality of safety equipments and that from non-safety equipment are inputted, and which synthesizes a display signal from the plural safety equipments and a display signal from the non-safety equipment; display signal switching unit to which a state signal showing an operation state of whether or not each monitoring and operation screen image of the plural safety equipments displays an operating device of the equipment, is inputted, and which switches a display signal from a safety equipment to be synthesized by the display signal synthesizing unit based on the inputted state signals; and an integrated monitoring and operation screen display that displays a display signal synthesized by the display signal synthesizing unit as an integrated monitoring and operation screen of a plant.
    Type: Application
    Filed: July 3, 2007
    Publication date: August 28, 2008
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Masashi Kitamura, Tadashi Ohi
  • Publication number: 20080136285
    Abstract: The spindle motor has a stator and rotor. The stator has a stator core comprising a yoke and salient poles and also includes a stator coil. The stator core is formed by laminated steel sheets. The salient poles made of the steel sheets are formed by etching. The steel sheet is 0.05 to 0.30 mm thick. The steel sheet used in the present invention is preferably a silicon steel sheet having crystal particles. The iron loss and cogging torque of the inventive spindle motor are reduced.
    Type: Application
    Filed: December 7, 2007
    Publication date: June 12, 2008
    Inventors: Fumio Tajima, Teruyoshi Abe, Motoya Ito, Yoshihisa Ishikawa, Masashi Kitamura, Toshuyuki Ajima
  • Publication number: 20080079322
    Abstract: It is made easy for a stator winding to be wound around a stator core and degradation in efficiency is prevented as much as possible. A stator 6 includes a plurality of phases, i.e., of circumferentially divided stator magnetic poles 6a, 6b, 6c. The stator magnetic poles 6a, 6b, 6c are each composed of an arcuate stator core 13 having a plurality of axially extending claw poles 16b and a circumferentially elliptically wound stator winding 14. The stator magnetic poles 6a, 6b, 6c are magnetically divided; therefore, magnetic flux leakage is reduced to improve efficiency. Air flowing between the stator magnetic poles 6a, 6b, 6c can improve a cooling effect.
    Type: Application
    Filed: August 7, 2007
    Publication date: April 3, 2008
    Applicant: Hitachi, Ltd.
    Inventors: Hiroshi KANAZAWA, Takayuki Koyama, Masashi Kitamura, Susumu Tajima, Kenya Takarai
  • Publication number: 20080018196
    Abstract: A claw teeth type electric rotary machine comprises a stator including an annular core with claws formed from a powder core and an annular coil installed inside the annular core, and a rotor rotatably positioned inside the stator. An inner edge of the annular core is provided with plural claw poles which are protruded at a predetermined interval in a circumferential direction and extended in an axial direction of the annular core so as to alternately meshes with each other. The stator comprises the annular core with claws, the annular coil, and a molded nonmagnetic potting material filled between the annular core with claws and annular coil, so that the annular core with claws and annular coil are integrated with the molded potting non-magnetic material.
    Type: Application
    Filed: July 24, 2007
    Publication date: January 24, 2008
    Inventors: Yuji Enomoto, Motoya Ito, Masashi Kitamura, Ryoso Masaki, Katsuyuki Yamazaki, Shoji Ohiwa, Yasuaki Motegi, Kazuo Asaka, Chio Ishihara
  • Publication number: 20080018195
    Abstract: The present invention realizes reduction in vibration and noise while utilizing reluctance torque. A rotating electrical machine of the present invention includes: a rotor in which a plurality of permanent magnets are disposed in a cylindrical surface coaxial with a rotary shaft; and a stator having a annular stator core disposed coaxially with the rotary shaft, and a annular coil for magnetizing the stator core. The stator core has a annular part covering the annular coil, a plurality of claws disposed at equal intervals in an inner radius surface of the annular part and extending in the axial direction, and a plurality of magnetic gaps formed between the neighboring claws. The number of the claws is equal to the number of permanent magnets, and magnet flux in a direction orthogonal to a center axis direction of the magnetic pole of the permanent magnet at right angles in electric angle is larger than magnetic flux in the center axis direction generated between the neighboring permanent magnets.
    Type: Application
    Filed: July 24, 2007
    Publication date: January 24, 2008
    Inventors: Masashi Kitamura, Fumio Tajima, Shigeru Kakugawa, Yuji Enomoto, Motoya Ito, Ryoso Masaki, Shoji Ohiwa, Chio Ishihara
  • Publication number: 20080019850
    Abstract: The present invention provides a compact electric motor, thus ensuring improved in-vehicle mountability. A pump is driven by an electric motor. The pump has a coil 14 disposed in a ring form around and along a stator core 13. The stator core 13 has a plurality of claw magnetic poles which extend alternately from both ends of one member of the stator core 13 toward the end of the other member thereof. The electric motor drives the pump by rotating a rotor 16 disposed to face the inner periphery of the stator core 13 as the coil 14 is energized. The present invention provides a compact electric pump with no coil ends, thus ensuring improved in-vehicle mountability. Further, the present invention permits efficient cooling of the electric motor adapted to discharge a cooling medium. Still further, the present invention permits the use of a stator core made from a compressed powder core by molding with resin. In addition, the molded portion also serves as a partition separating pump and motor units.
    Type: Application
    Filed: July 18, 2007
    Publication date: January 24, 2008
    Applicant: Hitachi, Ltd.
    Inventors: Fumio TAJIMA, Masashi Kitamura, Yuji Enomoto, Yuji Nomoto, Kenya Takarai
  • Publication number: 20080018194
    Abstract: A single-phase claw-pole type motor comprises a stator, which comprises a claw-pole type stator core and toroidally-wound single-phase stator windings, and a rotor that has alternate polarities, wherein a concave part or a convex part is provided on an air-gap surface of claws of the stator core. In addition, the stator core may be configured by compacting magnetic powder, and the single-phase claw-pole type motor may be driven by a converter that converts a direct current to an alternate current according to a position of the rotor.
    Type: Application
    Filed: July 20, 2007
    Publication date: January 24, 2008
    Inventors: Shigeru KAKUGAWA, Fumio Tajima, Masashi Kitamura, Yuji Enomoto, Motoya Ito, Ryoso Masaki, Shoji Ohiwa, Chio Ishihara
  • Publication number: 20080018289
    Abstract: A single-phase permanent magnet motor control apparatus, in particular, a low price, flat output torque, low vibration, low noise single-phase permanent magnet motor control apparatus, and a fan and pump using such a single-phase permanent magnet motor control apparatus are provided. In a single-phase permanent magnet motor control apparatus for driving a single-phase permanent magnet motor by using a DC power supply, a converter for converting DC to AC, and a control circuit for controlling the converter, a motor current measuring unit, a terminal voltage measuring unit, a correction unit for correcting an impedance drop in motor constants, and a calculation unit for finding an induced voltage to be obtained by control are included, and a polarity of a terminal voltage is determined on the basis of a value of the found induced voltage.
    Type: Application
    Filed: July 19, 2007
    Publication date: January 24, 2008
    Inventors: Fumio Tajima, Shigeru Kakugawa, Masashi Kitamura, Shoichi Kawamata, Hiroshi Kanazawa, Takayuki Koyama, Shoji Ohiwa, Osamu Sekiguchi
  • Publication number: 20080001483
    Abstract: The present invention provides a cylindrical linear motor that can develop great thrust and reduce thrust pulsations. The cylindrical linear motor includes a stator 1 and a movable element 10 disposed via a clearance with respect to the stator 1 and movable rectilinearly with respect to the stator 1. The stator 1 includes a stator core 3 having stator salient poles 3b, and a three-phase stator coil winding 2 inserted within the slots formed in the stator core 3. The movable element 10 has a plurality of permanent magnets 11 fixed to a movable element core 12. The cylindrical linear motor is constructed so that when the stator salient poles 3b are pitched at ?s and the permanent magnets 11 are pitched at ?p, a relationship of 3/4<?p/s<3/2 is established.
    Type: Application
    Filed: June 25, 2007
    Publication date: January 3, 2008
    Applicant: Hitachi, Ltd.
    Inventors: Masashi Kitamura, Fumio Tajima, Yusuke Akami, Noriyuki Utsumi, Ken Nakamura, Kazuaki Shibahara
  • Publication number: 20070222330
    Abstract: The stator core of a motor comprises an annular back core, and a plurality of tees created separately from the back core and secured onto the inner periphery of the back core. A stator coil is wound on each of the tees by a distributed or concentrated winding method. The stator core and stator coil are formed by molding.
    Type: Application
    Filed: May 31, 2007
    Publication date: September 27, 2007
    Applicant: HITACHI, LTD.
    Inventors: Toshiyuki INNAMI, Mitsuaki MIRUMACHI, Osamu KOIZUMI, Masamichi YAGAI, Masashi KITAMURA, Takashi ISHIGAMI
  • Patent number: 7242128
    Abstract: The stator core of a motor comprises an annular back core, and a plurality of tees created separately from the back core and secured onto the inner periphery of the back core. A stator coil is wound on each of the tees by a distributed or concentrated winding method. The stator core and stator coil are formed by molding.
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: July 10, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Toshiyuki Innami, Mitsuaki Mirumachi, Osamu Koizumi, Masamichi Yagai, Masashi Kitamura, Takashi Ishigami
  • Patent number: D541941
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: May 1, 2007
    Assignee: Omron Healthcare Co., Ltd.
    Inventors: Takefumi Nakanishi, Kenji Eda, Takahide Tanaka, Yosuke Fujii, Tadashi Koike, So Noguchi, Shuji Tsuruta, Masashi Kitamura, Izumi Hachimaru
  • Patent number: D561340
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: February 5, 2008
    Assignee: Omron Healthcare Co., Ltd.
    Inventors: Masashi Kitamura, Tadashi Koike, Yukiko Mitsunami, Takahide Tanaka, Hiroyuki Kato, Masayuki Fukutsuka, Takashi Shigeno, Kazuya Andachi
  • Patent number: D569518
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: May 20, 2008
    Assignee: Omron Healthcare Co., Ltd.
    Inventors: Masashi Kitamura, Tadashi Koike, Yukiko Mitsunami, Takahide Tanaka, Hiroyuki Kato, Masayuki Fukutsuka, Takashi Shigeno, Kazuya Andachi
  • Patent number: D571013
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: June 10, 2008
    Assignee: Omron Healthcare Co., Ltd.
    Inventors: Masashi Kitamura, Tadashi Koike, Yukiko Mitsunami, Takahide Tanaka, Hiroyuki Kato, Masayuki Fukutsuka, Takashi Shigeno, Kazuya Andachi
  • Patent number: D572660
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: July 8, 2008
    Assignees: Hitachi Industrial Equipment Systems Co., Ltd., Japan Servo Co., Ltd., Hitachi Powdered Metals Co., Ltd.
    Inventors: Yuji Enomoto, Motoya Ito, Kazumasa Ide, Masashi Kitamura, Ryoso Masaki, Katsuyuki Yamazaki, Shoji Ohiwa, Yasuaki Motegi, Kazuo Asaka, Chio Ishihara
  • Patent number: D574496
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: August 5, 2008
    Assignee: Omron Healthcare Co., Ltd.
    Inventors: Masashi Kitamura, Tadashi Koike, Yukiko Mitsunami, Takahide Tanaka, Hiroyuki Kato, Masayuki Fukutsuka, Takashi Shigeno, Kazuya Andachi
  • Patent number: D574497
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: August 5, 2008
    Assignee: Omron Healthcare Co., Ltd.
    Inventors: Masashi Kitamura, Tadashi Koike, Yukiko Mitsunami, Takahide Tanaka, Hiroyuki Kato, Masayuki Fukutsuka, Takashi Shigeno, Kazuya Andachi
  • Patent number: D583060
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: December 16, 2008
    Assignee: Omron Healthcare Co., Ltd.
    Inventors: Masashi Kitamura, Tadashi Koike, Yukiko Mitsunami, Takahide Tanaka, Hiroyuki Kato, Masayuki Fukutsuka, Takashi Shigeno, Kazuya Andachi