Patents by Inventor Tadanobu Matsumura

Tadanobu Matsumura 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: 8647079
    Abstract: A centrifugal fan assembly has a fan with a number of vanes at a peripheral edge of a rotor, a motor, arranged coaxially to the inside of the rotor, that rotates the fan, and a casing that houses the fan and the motor. The casing has an air inlet in the direction of a rotating shaft of the fan, and an air outlet in a radial direction. A first part of the casing near the air inlet is arranged relatively towards a center of the casing as compared to the other part of the casing. The motor is mounted on the first part.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: February 11, 2014
    Assignee: Fujitsu Limited
    Inventors: Michimasa Aoki, Masumi Suzuki, Tadanobu Matsumura
  • Publication number: 20120201704
    Abstract: A centrifugal fan assembly has a fan with a number of vanes at a peripheral edge of a rotor, a motor, arranged coaxially to the inside of the rotor, that rotates the fan, and a casing that houses the fan and the motor. The casing has an air inlet in the direction of a rotating shaft of the fan, and an air outlet in a radial direction. A first part of the casing near the air inlet is arranged relatively towards a center of the casing as compared to the other part of the casing. The motor is mounted on the first part.
    Type: Application
    Filed: April 16, 2012
    Publication date: August 9, 2012
    Applicant: FUJITSU LIMITED
    Inventors: Michimasa AOKI, Masumi Suzuki, Tadanobu Matsumura
  • Patent number: 8157540
    Abstract: A centrifugal fan assembly has a fan with a number of vanes at a peripheral edge of a rotor, a motor, arranged coaxially to the inside of the rotor, that rotates the fan, and a casing that houses the fan and the motor. The casing has an air inlet in the direction of a rotating shaft of the fan, and an air outlet in a radial direction. A first part of the casing near the air inlet is arranged relatively towards a center of the casing as compared to the other part of the casing. The motor is mounted on the first part.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: April 17, 2012
    Assignee: Fujitsu Limited
    Inventors: Michimasa Aoki, Masumi Suzuki, Tadanobu Matsumura
  • Patent number: 7479383
    Abstract: PQQGDH having an improved substrate specificity or having an improved specific activity in an assay system using ferricyanide ion as a mediator is provided. Modified PQQGDH having the enhanced substrate specificity by introducing an amino acid mutation in a particular region of PQQGDH, and a method of enhancing the specific activity compared with a wild type in the assay system using the ferricyanide ion as the mediator by deleting, substituting, or adding one or more amino acids in an amino acid sequence of the wild type pyrroloquinoline quinone dependent glucose dehydrogenase.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: January 20, 2009
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Seiji Takeshima, Tadanobu Matsumura, Takahide Kishimoto, Masanori Oka, Noriaki Hirayama
  • Publication number: 20080260527
    Abstract: A centrifugal fan assembly has a fan with a number of vanes at a peripheral edge of a rotor, a motor, arranged coaxially to the inside of the rotor, that rotates the fan, and a casing that houses the fan and the motor. The casing has an air inlet in the direction of a rotating shaft of the fan, and an air outlet in a radial direction. A first part of the casing near the air inlet is arranged relatively towards a center of the casing as compared to the other part of the casing. The motor is mounted on the first part.
    Type: Application
    Filed: January 31, 2008
    Publication date: October 23, 2008
    Inventors: Michimasa Aoki, Masumi Suzki, Tadanobu Matsumura
  • Publication number: 20070105173
    Abstract: PQQGDH having an improved substrate specificity or having an improved specific activity in an assay system using ferricyanide ion as a mediator is provided. Modified PQQGDH having the enhanced substrate specificity by introducing an amino acid mutation in a particular region of PQQGDH, and a method of enhancing the specific activity compared with a wild type in the assay system using the ferricyanide ion as the mediator by deleting, substituting, or adding one or more amino acids in an amino acid sequence of the wild type pyrroloquinoline quinone dependent glucose dehydrogenase.
    Type: Application
    Filed: August 31, 2004
    Publication date: May 10, 2007
    Applicant: Toyo Boseki Kabushiki Kaisha
    Inventors: Seiji Takeshima, Tadanobu Matsumura, Takahide Kishimoto, Masanori Oka, Noriaki Hirayama
  • Patent number: 6809916
    Abstract: A shock absorbing body is interposed between an internal component such as a hard disk drive (HDD) and the inside surface of an enclosure for an electronic apparatus such as a notebook personal computer. The shock absorbing body includes a first receiving surface defined at one end of the shock absorbing body so as to receive the internal component. A second receiving surface is defined at the other end of the shock absorbing body so as to receive the inside surface of the enclosure. A constriction is formed in the shock absorbing body between the first and second receiving surfaces. When a larger impact is applied to the enclosure, the shock absorbing body is allowed to suffer from a fracture at the constriction. The energy of the impact is transformed into the energy of the fracture at the constriction. The impact energy is sufficiently consumed in this manner. The internal component can be protected from the larger impact.
    Type: Grant
    Filed: January 30, 2001
    Date of Patent: October 26, 2004
    Assignee: Fujitsu Limited
    Inventors: Katsuhiko Nakata, Tadanobu Matsumura, Shinichirou Kouno
  • Publication number: 20020043608
    Abstract: A shock absorbing body is interposed between an internal component such as a hard disk drive (HDD) and the inside surface of an enclosure for an electronic apparatus such as a notebook personal computer. The shock absorbing body includes a first receiving surface defined at one end of the shock absorbing body so as to receive the internal component. A second receiving surface is defined at the other end of the shock absorbing body so as to receive the inside surface of the enclosure. A constriction is formed in the shock absorbing body between the first and second receiving surfaces. When a larger impact is applied to the enclosure, the shock absorbing body is allowed to suffer from a fracture at the constriction. The energy of the impact is transformed into the energy of the fracture at the constriction. The impact energy is sufficiently consumed in this manner. The internal component can be protected from the larger impact.
    Type: Application
    Filed: January 30, 2001
    Publication date: April 18, 2002
    Applicant: FUJITSU LIMITED
    Inventors: Katsuhiko Nakata, Tadanobu Matsumura, Shinichirou Kouno
  • Patent number: 6067227
    Abstract: A heat sink mounted on a heat producing element for cooling the heat producing element attached on the printed board of the electronic apparatus, having a heat sink body made of a good heat conductive material and a fan assembly installed inside the heat sink body. The heat sink body is efficiently air-cooled by a cooling air generated by the rotation of the fan assembly. The cooling air forcibly cools a base and a fixing wall of the base adjacent to the heat producing element and plate-like radiating fins or a pin-like radiating fins are protruded on the heat sink body to radiate the heat effectively. The position of the fan assembly is at the center of the heat sink body or is at the offset position from the center of the heat sink body. The heat sink of the present invention can be installed in a portable electronic apparatus such as a portable computer.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: May 23, 2000
    Assignees: Fujitsu Limited, PFU Limited
    Inventors: Tadashi Katsui, Katsuhiko Nakata, Takeshi Koga, Tadanobu Matsumura, Yoshimi Tanaka, Yasuaki Sugimoto, Takashi Kitahara, Takayuki Horinishi
  • Patent number: 5940267
    Abstract: A heat sink mounted on a heat producing element for cooling the heat producing element attached on the printed board of the electronic apparatus, having a heat sink body made of a good heat conductive material and a fan assembly installed inside the heat sink body. The heat sink body is efficiently air-cooled by a cooling air generated by the rotation of the fan assembly. The cooling air forcibly cools a base and a fixing wall of the base adjacent to the heat producing element and plate-like radiating fins or a pin-like radiating fins are protruded on the heat sink body to radiate the heat effectively. The position of the fan assembly is at the center of the heat sink body or is at the offset position from the center of the heat sink body. The heat sink of the present invention can be installed in a portable electronic apparatus such as a portable computer.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: August 17, 1999
    Assignees: Fujitsu Limited, PFU Limited
    Inventors: Tadashi Katsui, Katsuhiko Nakata, Takeshi Koga, Tadanobu Matsumura, Yoshimi Tanaka, Yasuaki Sugimoto, Takashi Kitahara, Takayuki Horinishi
  • Patent number: 5650912
    Abstract: A heat sink mounted on a heat producing element for cooling the heat producing element attached on the printed board of the electronic apparatus, having a heat sink body made of a good heat conductive material and a fan assembly installed inside the heat sink body. The heat sink body is efficiently air-cooled by a cooling air generated by the rotation of the fan assembly. The cooling air forcibly cools a base and a fixing wall of the base adjacent to the heat producing element and plate-like radiating fins or a pin-like radiating fins are protruded on the heat sink body to radiate the heat effectively. The position of the fan assembly is at the center of the heat sink body or is at the offset position from the center of the heat sink body. The heat sink of the present invention can be installed in a portable electronic apparatus such as a portable computer.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 22, 1997
    Assignees: Fujitu Limited, PFU Limited
    Inventors: Tadashi Katsui, Katsuhiko Nakata, Takeshi Koga, Tadanobu Matsumura, Yoshimi Tanaka, Yasuaki Sugimoto, Takashi Kitahara, Takayuki Horinishi
  • Patent number: 5504650
    Abstract: A heat sink mounted on a heat producing element for cooling the heat producing element attached on the printed board of the electronic apparatus, having a heat sink body made of a good heat conductive material and a fan assembly installed inside the heat sink body. The heat sink body is efficiently air-cooled by a cooling air generated by the rotation of the fan assembly. The cooling air forcibly cools a base and a fixing wall of the base adjacent to the heat producing element and plate-like radiating fins or a pin-like radiating fins are protruded on the heat sink body to radiate the heat effectively. The position of the fan assembly is at the center of the heat sink body or is at the offset position from the center of the heat sink body. The heat sink of the present invention can be installed in a portable electronic apparatus such as a portable computer.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: April 2, 1996
    Assignees: Fujitsu Limited, PFU Limited
    Inventors: Tadashi Katsui, Katsuhiko Nakata, Takeshi Koga, Tadanobu Matsumura, Yoshimi Tanaka, Yasuaki Sugimoto, Takashi Kitahara, Takayuki Horinishi
  • Patent number: 5310156
    Abstract: An earthquake-proof leg support structure (10) of an electronic apparatus comprising a leg (12) vertically downwardly extending from the outer case (1) and a dish-shaped leg support seat (20) to receive the leg (12). The leg support seat (20) includes a metal element (28) having an upper surface (22) over which the leg (12) slides and a peripheral flange (24) against which the leg (12) abuts, and a plastic liner (30) having a lower flat smooth surface (26) which is slidable on the floor. The lower end surface (14) of the leg is of a convex spherical shape and the upper surface (22) of the leg support seat includes a central surface portion (22a) of a concave spherical shape and a cone-shaped slope portion (22b) arranged around and tangential to the central surface portion, with the radius of curvature of the leg (12) being smaller than that of the upper surface (22) of the leg support seat (20 ).
    Type: Grant
    Filed: August 24, 1992
    Date of Patent: May 10, 1994
    Assignee: Fujitsu Limited
    Inventors: Tadanobu Matsumura, Yasuhide Iwamoto, Yoshio Makino, Osamu Nishina, Katuei Satou, Takasi Watanabe, Yujiro Hata, Toshiro Kubo, Wataru Ishizu, Takashi Simura
  • Patent number: 4486058
    Abstract: A power source terminal assembly for the wiring of electronic instruments, in which a plurality of terminal screw rods, each having a central flange, are molded into an insulating substrate with the flanges partly embedded therein. At least one of the terminal screw rods is designed so that one side of the flange projects outwardly from the substrate surface by a predetermined amount, and this terminal screw rod is used as a grounding terminal. A casing of an electronic instrument has a hole, for receiving the grounding terminal screw rod to permit one side of its flange to make contact with the casing, and a window for insertion of the other terminal screw rods without making contact with the casing. The power source terminal assembly is engaged with the casing, and the grounding terminal and one portion of the power source assembly are fixedly retained by fixing means to the casing.
    Type: Grant
    Filed: September 14, 1982
    Date of Patent: December 4, 1984
    Assignee: Fujitsu Limited
    Inventors: Yasumasa Takagi, Tomohico Sasaki, Tadanobu Matsumura, Tadashi Gobuichi