Patents by Inventor Hirotoshi Fujikawa

Hirotoshi Fujikawa 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: 8623125
    Abstract: An electrode for plasma generation according to the present invention includes a plurality of collecting portions having a plurality of through holes, the plurality of collecting portions facing a gas flow in a direction where gas to be treated flows and provided spaced apart from each other. The electrode is applied to a plasma reactor of a treatment device to be provided for a device which discharges the smoke including PM, for example, an exhaust gas purifying device for automobile, or a smoke treatment device used in a facility where the smoke is discharged such as a plant.
    Type: Grant
    Filed: July 28, 2008
    Date of Patent: January 7, 2014
    Assignee: Daihatsu Motor Co., Ltd.
    Inventors: Yoonho Kim, Kazuya Naito, Takashi Ogawa, Isao Tan, Hirohisa Tanaka, Hirotoshi Fujikawa, Kazuhiko Madokoro
  • Publication number: 20120003125
    Abstract: An exhaust gas purification apparatus 4 includes a plasma reactor 7 having gas flow passages 28 through which exhaust gas is to pass, and a power source 8 for supplying power to the plasma reactor 7 with a variable application voltage and/or a variable frequency of the application voltage of the power to be supplied. The exhaust gas purification apparatus 4 is adapted to change the application voltage and/or a pulse recurrence frequency of the application voltage, based on a change in amount of PM and/or flow rate of gas passing through the gas flow passages 28. Accordingly, efficient oxidization of PM in the exhaust gas and suppression of consumption of discharged power are achieved.
    Type: Application
    Filed: March 15, 2010
    Publication date: January 5, 2012
    Applicant: DAIHATSU MOTOR CO., LTD.
    Inventors: Kazuhiko Madokoro, Takashi Ogawa, Kazuya Naito, Yoonho Kim, Hirotoshi Fujikawa, Hirohisa Tanaka
  • Publication number: 20110232492
    Abstract: An electrode for plasma generation according to the present invention includes a plurality of collecting portions having a plurality of through holes, the plurality of collecting portions facing a gas flow in a direction where gas to be treated flows and provided spaced apart from each other. The electrode is applied to a plasma reactor of a treatment device to be provided for a device which discharges the smoke including PM, for example, an exhaust gas purifying device for automobile, or a smoke treatment device used in a facility where the smoke is discharged such as a plant.
    Type: Application
    Filed: July 28, 2008
    Publication date: September 29, 2011
    Applicant: DAIHATSU MOTOR CO., LTD.
    Inventors: Yoonho Kim, Kazuya Naito, Takashi Ogawa, Isao Tan, Hirohisa Tanaka, Hirotoshi Fujikawa, Kazuhiko Madokoro
  • Patent number: 5133316
    Abstract: The present invention provides a cylinder head cover for an internal combustion engine having excellent vibration-damping properties which is prepared by molding a composition comprising 75 to 30% by weight, based on the composition, of resin components comprising 50 to 80% by weight of a polyamide resin and 50 to 20% by weight of a modified polyolefin resin modified with an unsaturated acid or its derivative, the total of both the resins being 100% by weight, 15 to 30% by weight of glass fibers based on the composition, and 10 to 40% by weight of mica based on the composition.
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: July 28, 1992
    Assignees: Chisso Corporation, Daihatsu Motor Co., Ltd., Toyoda Gosei Co., Ltd.
    Inventors: Michio Kasai, Rikio Yonaiyama, Hirotoshi Fujikawa, Hidetoshi Ishihara, Joji Kasugai, Junji Koizumi