Patents by Inventor Yoshiaki Ishihara

Yoshiaki Ishihara 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: 20150280582
    Abstract: In a resonance DC/DC converter, an input circuit has a configuration including a DC power source, a resonance auxiliary coil, a primary-side coil, a switching element connected in series, and a rectifying element and a resonance capacitor connected to the switching element in parallel. Here, there are provided an inductance value shifting circuit configured to shift an inductance value of the resonance auxiliary coil, and a control device configured to control the inductance value shifting circuit and shift the inductance value of the resonance auxiliary coil in accordance with a voltage value of the DC power source so that a voltage across the primary-side coil becomes constant.
    Type: Application
    Filed: March 26, 2015
    Publication date: October 1, 2015
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Hiroo FUMA, Takaji UMENO, Yoshiro KATO, Yoshiaki ISHIHARA, Sergey MOISEEV
  • Publication number: 20150256149
    Abstract: A noise filter disclosed herein is configured to suppress a common mode voltage that is generated in cables connected to an electric power converter. The noise filter includes: detecting capacitors connected to the cables, respectively, and configured to detect the common mode voltage; an operational amplifier having a positive input terminal via which the common mode voltage detected by the detecting capacitors is inputted; an emitter follower circuit having an input terminal connected to an output terminal of the operational amplifier and having an output terminal connected to a negative input terminal of the operational amplifier; and a transformer configured to apply a compensating voltage to each of the cables by applying a voltage at the output terminal of the emitter follower circuit to each of the cables in opposite phase.
    Type: Application
    Filed: February 5, 2015
    Publication date: September 10, 2015
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Yoshiaki ISHIHARA, Kazuji YAMAZAKI, Naoto KIKUCHI, Yoshitoshi WATANABE
  • Patent number: 9130542
    Abstract: A noise filter disclosed herein is configured to suppress a common mode voltage that is generated in cables connected to an electric power converter. The noise filter includes: detecting capacitors connected to the cables, respectively, and configured to detect the common mode voltage; an operational amplifier having a positive input terminal via which the common mode voltage detected by the detecting capacitors is inputted; an emitter follower circuit having an input terminal connected to an output terminal of the operational amplifier and having an output terminal connected to a negative input terminal of the operational amplifier; and a transformer configured to apply a compensating voltage to each of the cables by applying a voltage at the output terminal of the emitter follower circuit to each of the cables in opposite phase.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: September 8, 2015
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Yoshiaki Ishihara, Kazuji Yamazaki, Naoto Kikuchi, Yoshitoshi Watanabe
  • Patent number: 8822443
    Abstract: To provide a solid herbicidal composition in which decomposition of the herbicidal active ingredient is suppressed, and favorable herbicidal activity is stably exhibited. A solid herbicidal composition comprising (1) 1-(4,6-dimethoxypyrimidin-2-yl)-3-(3-trifluoromethyl-2-pyridylsulfonyl)urea or its salt and (2) at least one surfactant selected from the group consisting of a naphthalene sulfonate condensed with formaldehyde, an alkylnaphthalene sulfonate condensed with formaldehyde, a dialkylnaphthalene sulfonate condensed with formaldehyde and a polycarboxylate.
    Type: Grant
    Filed: January 15, 2007
    Date of Patent: September 2, 2014
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventors: Yoshiaki Ishihara, Kazutaka Ikeda
  • Patent number: 8575067
    Abstract: A herbicidal composition comprising a herbicidal sulfonylurea compound or its salt, and an alkoxylated glyceride. A method for controlling undesired plants or inhibiting their growth, which comprises applying a herbicidally effective amount of the herbicidal composition to the undesired plants or to a place where they grow. A method for enhancing the herbicidal effect of a herbicidal sulfonylurea compound or its salt by means of an alkoxylated glyceride.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: November 5, 2013
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventors: Hiroshi Yoshii, Yoshiaki Ishihara, Ryu Yamada, Tatsuhiko Tsuruta
  • Patent number: 8518860
    Abstract: A herbicidal suspension comprising (1) a sulfonylurea compound or its salt as a herbicidal component, (2) at least one surfactant selected from the group consisting of an alkoxylated sorbitol fatty acid ester and an alkoxylated sorbitan fatty acid ester, and (3) a water-immiscible diluent. A method for controlling undesired plants or inhibiting their growth, which comprises applying a herbicidally effective amount of the herbicidal suspension to the undesired plants or to a place where they grow.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: August 27, 2013
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventors: Hiroshi Yoshii, Yoshiaki Ishihara, Ryu Yamada, Tatsuhiko Tsuruta
  • Patent number: 8501667
    Abstract: Not so many reports on the practical use of herbicidal sulfonylurea compounds have been made since they easily decompose in water or a process for production of their suspensions is complicated. Therefore, it is desired to prepare a water-based herbicidal suspension in which a herbicidal sulfonylurea compound will not decompose in water and excellent suspensibility of which is maintained, without complicated process. A water-based herbicidal suspension comprising (1) a herbicidal sulfonylurea compound (excluding 1-[3-[(4,6-dimethoxypyrimidin-2-ylcarbamoyl)sulfamoyl]-2-pyridyl]-2-fluoropropyl methoxyacetate and N-[(4,6-dimethoxypyrimidin-2-yl)aminocarbonyl]-2-(2-fluoro-1-hydroxypropyl)-3-pyridinesulfonamide) or its salt, (2) an inorganic salt, (3) at least one sulfonate selected from the group consisting of an aryl sulfonate, an alkylaryl sulfonate and their formaldehyde condensates and (4) water.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: August 6, 2013
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventors: Yoshiaki Ishihara, Tatsuhiko Tsuruta
  • Patent number: 7981839
    Abstract: A herbicidal suspension comprising (1) a sulfonylurea compound or its salt as a herbicidal component, (2) at least one surfactant selected from the group consisting of an alkoxylated sorbitol fatty acid ester and an alkoxylated sorbitan fatty acid ester, and (3) a water-immiscible diluent. A method for controlling undesired plants or inhibiting their growth, which comprises applying a herbicidally effective amount of the herbicidal suspension to the undesired plants or to a place where they grow.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: July 19, 2011
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventors: Hiroshi Yoshii, Yoshiaki Ishihara, Ryu Yamada, Tatsuhiko Tsuruta
  • Publication number: 20110166024
    Abstract: A herbicidal suspension comprising (1) a sulfonylurea compound or its salt as a herbicidal component, (2) at least one surfactant selected from the group consisting of an alkoxylated sorbitol fatty acid ester and an alkoxylated sorbitan fatty acid ester, and (3) a water-immiscible diluent. A method for controlling undesired plants or inhibiting their growth, which comprises applying a herbicidally effective amount of the herbicidal suspension to the undesired plants or to a place where they grow.
    Type: Application
    Filed: March 16, 2011
    Publication date: July 7, 2011
    Applicant: ISHIHARA SANGYO KAISHA, LTD.
    Inventors: Hiroshi Yoshii, Yoshiaki Ishihara, Ryu Yamada, Tatsuhiko Tsuruta
  • Publication number: 20110028528
    Abstract: When an organosilicone surface active agent is added to a pesticidal aqueous suspension composition containing an active ingredient compound of a sparingly water-soluble pesticide for the purpose of attaining activity enhancement and formulation, the following problems arise: such that (1) the viscosity of the composition increases; (2) a large amount of foams due to the organosilicone surface active agent tends to generate at the time of preparation of a spray solution; and the like. Thus, measuring the composition and preparation of a spray solution were difficult.
    Type: Application
    Filed: March 31, 2009
    Publication date: February 3, 2011
    Applicant: ISHIHARA SANGYO KAISHA, LTD.
    Inventors: Yoshiaki Ishihara, Takeshi Shindo
  • Publication number: 20100093539
    Abstract: Not so many reports on the practical use of herbicidal sulfonylurea compounds have been made since they easily decompose in water or a process for production of their suspensions is complicated. Therefore, it is desired to prepare a water-based herbicidal suspension in which a herbicidal sulfonylurea compound will not decompose in water and excellent suspensibility of which is maintained, without complicated process. A water-based herbicidal suspension comprising (1) a herbicidal sulfonylurea compound (excluding 1-[3-[(4,6-dimethoxypyrimidin-2-ylcarbamoyl)sulfamoyl]-2-pyridyl]-2-fluoropropyl methoxyacetate and N-[(4,6-dimethoxypyrimidin-2-yl)aminocarbonyl]-2-(2-fluoro-1-hydroxypropyl)-3-pyridinesulfonamide) or its salt, (2) an inorganic salt, (3) at least one sulfonate selected from the group consisting of an aryl sulfonate, an alkylaryl sulfonate and their formaldehyde condensates and (4) water.
    Type: Application
    Filed: July 24, 2006
    Publication date: April 15, 2010
    Applicant: Ishihara Sangyo Kaisha, LTD.
    Inventors: Yoshiaki Ishihara, Tatsuhiko Tsuruta
  • Publication number: 20090069346
    Abstract: To provide a solid herbicidal composition in which decomposition of the herbicidal active ingredient is suppressed, and favorable herbicidal activity is stably exhibited. A solid herbicidal composition comprising (1) 1-(4,6-dimethoxypyrimidin-2-yl)-3-(3-trifluoromethyl-2-pyridylsulfonyl)urea or its salt and (2) at least one surfactant selected from the group consisting of a naphthalene sulfonate condensed with formaldehyde, an alkylnaphthalene sulfonate condensed with formaldehyde, a dialkylnaphthalene sulfonate condensed with formaldehyde and a polycarboxylate.
    Type: Application
    Filed: January 15, 2007
    Publication date: March 12, 2009
    Applicant: ISHIHARA SANGYO KAISHA, LTD.
    Inventors: Yoshiaki Ishihara, Kazutaka Ikeda
  • Publication number: 20090029862
    Abstract: A herbicidal suspension comprising (1) a sulfonylurea compound or its salt as a herbicidal component, (2) at least one surfactant selected from the group consisting of an alkoxylated sorbitol fatty acid ester and an alkoxylated sorbitan fatty acid ester, and (3) a water-immiscible diluent. A method for controlling undesired plants or inhibiting their growth, which comprises applying a herbicidally effective amount of the herbicidal suspension to the undesired plants or to a place where they grow.
    Type: Application
    Filed: February 23, 2006
    Publication date: January 29, 2009
    Applicant: ISHIHARA SANGYO KAISHA, LTD.
    Inventors: Hiroshi Yoshii, Yoshiaki Ishihara, Ryu Yamada, Tatsuhiko Tsuruta
  • Publication number: 20060154824
    Abstract: A herbicidal composition comprising a herbicidal sulfonylurea compound or its salt, and an alkoxylated glyceride. A method for controlling undesired plants or inhibiting their growth, which comprises applying a herbicidally effective amount of the herbicidal composition to the undesired plants or to a place where they grow. A method for enhancing the herbicidal effect of a herbicidal sulfonylurea compound or its salt by means of an alkoxylated glyceride.
    Type: Application
    Filed: June 30, 2004
    Publication date: July 13, 2006
    Applicant: Ishihara Sangyo Kaisha, Ltd.
    Inventors: Hiroshi Yoshii, Yoshiaki Ishihara, Ryu Yamada, Tatsuhiko Tsuruta
  • Patent number: 6711037
    Abstract: An inverter includes a plurality of transistors, generates a 3-phase AC voltage, and supplies it to a 3-phase AC motor. The voltage on the primary side of a transformer connected to the neutral point of the 3-phase AC motor is controlled by changing the phase difference of a drive signal of each phase supplied to the inverter through a phase difference circuit. Thus, the output voltage of the transformer can be set to a desired value by a power supply circuit with a simple configuration.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: March 23, 2004
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Yasuharu Odachi, Yoshiaki Ishihara, Seiki Sakata
  • Publication number: 20020191423
    Abstract: An inverter includes a plurality of transistors, generates a 3-phase AC voltage, and supplies it to a 3-phase AC motor. The voltage on the primary side of a transformer connected to the neutral point of the 3-phase AC motor is controlled by changing the phase difference of a drive signal of each phase supplied to the inverter through a phase difference circuit. Thus, the output voltage of the transformer can be set to a desired value by a power supply circuit with a simple configuration.
    Type: Application
    Filed: June 12, 2002
    Publication date: December 19, 2002
    Inventors: Yasuharu Odachi, Yoshiaki Ishihara, Seiki Sakata
  • Publication number: 20020141216
    Abstract: In a multi-output power conversion circuit which drives a polyphase AC motor and another device but the polyphase AC motor using a DC power source, a transformer is connected to the neutral point of the polyphase AC motor, an AC voltage at a zero-phase voltage frequency is obtained from the transformer, and the other device is loaded with the AC voltage.
    Type: Application
    Filed: March 6, 2002
    Publication date: October 3, 2002
    Inventors: Yoshiaki Ishihara, Seiki Sakata, Yasuharu Odachi
  • Patent number: 6037745
    Abstract: A charging apparatus for charging batteries of automobiles includes an inverter for converting the direct current from a direct current power source into an alternating current and a transformer having a first coil and a second coil. When an alternating current from the inverter is applied to the first coil, the second coil produces an alternating voltage. A capacitor is connected between the terminals of the second coil to increase the alternating voltage produced in the second coil. A rectifier circuit rectifies the alternating voltage increased in the booster circuit into a direct current voltage and the direct current voltage is applied to the battery. Two transistors, which function as a short circuit, are provided in the rectifier circuit. When the direct current voltage from the rectifier circuit is equal to or higher than a predetermined permissible value, a drive signal from a drive circuit turns on the two transistors.
    Type: Grant
    Filed: July 1, 1998
    Date of Patent: March 14, 2000
    Assignees: Kabushiki Kaisha Toyoda Jidoshokki, Nissan Motor Co., Ltd.
    Inventors: Yasuhiro Koike, Seiki Sakata, Yoshiaki Ishihara, Kazuki Najima, Tomotaka Kurozu, Masayuki Fukuda, Hajime Satoh