Patents by Inventor Koji KUWABARA

Koji KUWABARA 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: 8824170
    Abstract: A power factor correct current resonance converter is disclosed which eliminates interference of switching operations between two cascade-connected converter circuits. The power factor correct current resonance converter includes a current resonance converter circuit having switches, a resonance capacitor, a resonance inductor, a transformer, diodes, a smoothing capacitor, and a control circuit. The power factor correct current resonance converter also includes a power factor correct converter circuit having a choke coil, a diode, a smoothing capacitor, and a switch. The switch is turned on or off in response to a voltage produced in a winding of the transformer. Thus, the switching operation of the power factor correct converter circuit is performed in synchronization with the switching operation of the current resonance converter circuit, so that interference of the switching operations is eliminated. In addition, since a dedicated control circuit is not required, the cost can be reduced.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: September 2, 2014
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Koji Kuwabara, Tadahiko Sato
  • Patent number: 8690184
    Abstract: A back plate 7 is provided to a backside of a case 8 which accommodates an airbag 11 of an airbag module 5 to reduce the deformation of the case 8 toward a back side in the event of airbag deployment. The back plate 7 is supported on a steering member or the case 8, and an upper portion of the back plate 7 is held on a back support 19 protruding from the instrument panel 1.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: April 8, 2014
    Assignees: DaikyoNishikawa Corporation, Mazda Motor Corporation
    Inventors: Toshiteru Yoshimura, Tsuyoshi Shimono, Daisuke Matsuoka, Yamehito Tamura, Koji Kuwabara, Masayoshi Ono, Hiroyuki Kawai, Kazuhiro Tanaka
  • Patent number: 8602479
    Abstract: An instrument panel which is supported at a cowl panel at a front-side portion thereof is provided. The cowl panel includes an upper face wall which faces to a windshield from below, a bending portion which is formed at a rear end of the upper face wall and bendable in a vehicle collision, and a rear face wall which extends downward from the bending portion and has a lower portion connecting to a dash panel. The instrument panel includes a first restriction portion to restrict a downward move of the instrument panel by contacting the upper face wall of the cowl member, and a second restriction portion to restrict an upward move of the instrument panel by said rear face wall of the cowl member at a lower portion of the front-side portion thereof.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: December 10, 2013
    Assignee: Mazda Motor Corporation
    Inventors: Koji Kuwabara, Masayoshi Ono, Kazuhiro Tanaka, Kazunari Shimada, Tadashi Yamazaki, Yasuhiko Nishida
  • Publication number: 20130076010
    Abstract: A back plate 7 is provided to a backside of a case 8 which accommodates an airbag 11 of an airbag module 5 to reduce the deformation of the case 8 toward a back side in the event of airbag deployment. The back plate 7 is supported on a steering member or the case 8, and an upper portion of the back plate 7 is held on a back support 19 protruding from the instrument panel 1.
    Type: Application
    Filed: September 10, 2012
    Publication date: March 28, 2013
    Applicants: MAZDA MOTOR CORPORATION, DAIKYONISHIKAWA CORPORATION
    Inventors: Toshiteru YOSHIMURA, Tsuyoshi SHIMONO, Daisuke MATSUOKA, Yumehito TAMURA, Koji KUWABARA, Masayoshi ONO, Hiroyuki KAWAI, Kazuhiro TANAKA
  • Publication number: 20120063174
    Abstract: A power factor correct current resonance converter is disclosed which eliminates interference of switching operations between two cascade-connected converter circuits. The power factor correct current resonance converter includes a current resonance converter circuit having switches, a resonance capacitor, a resonance inductor, a transformer, diodes, a smoothing capacitor, and a control circuit. The power factor correct current resonance converter also includes a power factor correct converter circuit having a choke coil, a diode, a smoothing capacitor, and a switch. The switch is turned on or off in response to a voltage produced in a winding of the transformer. Thus, the switching operation of the power factor correct converter circuit is performed in synchronization with the switching operation of the current resonance converter circuit, so that interference of the switching operations is eliminated. In addition, since a dedicated control circuit is not required, the cost can be reduced.
    Type: Application
    Filed: September 14, 2011
    Publication date: March 15, 2012
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Koji KUWABARA, Tadahiko Sato