Patents by Inventor Masakazu Katou
Masakazu Katou 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).
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Patent number: 11097209Abstract: An object of the present invention is to provide a separation method capable of efficiently separating a light liquid and a heavy liquid from a mixed liquid containing the light liquid, the heavy liquid, and an emulsion liquid of the light liquid and the heavy liquid, such as an emulsion-layer extraction liquid in a vicinity of an interface in an extraction column. The present invention relates to a separation method for continuously separating a light liquid and a heavy liquid having a specific gravity larger than that of the light liquid from a mixed liquid containing the light liquid, the heavy liquid, and an emulsion liquid of the light liquid and the heavy liquid by introducing the mixed liquid into a separation tank, in which a specific separation layer is used for the separation tank.Type: GrantFiled: March 17, 2020Date of Patent: August 24, 2021Assignee: Mitsubishi Chemical CorporationInventors: Yasushi Ogawa, Masakazu Katou, Yukihiro Hasegawa
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Publication number: 20200215458Abstract: An object of the present invention is to provide a separation method capable of efficiently separating a light liquid and a heavy liquid from a mixed liquid containing the light liquid, the heavy liquid, and an emulsion liquid of the light liquid and the heavy liquid, such as an emulsion-layer extraction liquid in a vicinity of an interface in an extraction column. The present invention relates to a separation method for continuously separating a light liquid and a heavy liquid having a specific gravity larger than that of the light liquid from a mixed liquid containing the light liquid, the heavy liquid, and an emulsion liquid of the light liquid and the heavy liquid by introducing the mixed liquid into a separation tank, in which a specific separation layer is used for the separation tank.Type: ApplicationFiled: March 17, 2020Publication date: July 9, 2020Applicant: Mitsubishi Chemical CorporationInventors: Yasushi Ogawa, Masakazu Katou, Yukihiro Hasegawa
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Patent number: 8385095Abstract: An increase in a ripple voltage of a capacitor in a smoothing circuit is prevented to achieve a compact capacitor and cost reduction for capacitors in an electric power supply circuit which performs PAM control using a switching element. An electric power supply circuit includes a bridge circuit for rectifying alternating current power, a smoothing circuit which has two capacitors serially connected to each other, and a PAM control section for turning a switching element on and off at a predetermined timing. The PAM control section includes a phase difference detection section which detects a phase shift of a PAM waveform based on a change in a voltage difference between the two capacitors, and a phase correction section which corrects the phase of the PAM waveform so that an input current has a sine waveform.Type: GrantFiled: March 31, 2008Date of Patent: February 26, 2013Assignee: Daikin Industries, Ltd.Inventors: Ryou Nakamoto, Masafumi Hashimoto, Keisuke Shimatani, Keiichi Yoshisaka, Masakazu Katou
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Patent number: 8270187Abstract: An electric power supply circuit includes a switching element (S) for causing a short-circuit for output power of a diode bridge circuit (12), a zero-cross detector section (5a) for detecting a point at which an input voltage reaches a level equal to or lower than a reference level, a timer section (5d) for starting a count upon the detection by the zero-cross detector section (5a), and a PAM waveform output section (5c) for causing the switching element (S) to perform switching with a predetermined output timing so that a waveform of the input current is caused to approximate to a sine wave. The circuit further includes a correction section (5e) for correcting, when a difference between a detection interval from detection to detection by the zero-cross detector section (5a), and an average value for detection intervals up to current detection occurs, an initial value of the count of the timer section (5d) according to the difference.Type: GrantFiled: March 18, 2008Date of Patent: September 18, 2012Assignee: Daikin Industries, Ltd.Inventors: Ryou Nakamoto, Masafumi Hashimoto, Keisuke Shimatani, Keiichi Yoshisaka, Masakazu Katou
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Patent number: 8218342Abstract: The power supply device according to the present invention converts alternating-current power into direct-current power, and supplies the direct-current power to a load. Further, the power supply device includes a buffer, a control section, a rectifier circuit, a smoothing circuit, and a switch. After a predetermined zero cross point is detected, the control section uses in common, over a predetermined period of the alternating-current power, predetermined parameters retained in the buffer in calculating a timing at which a PAM interrupt pulse is generated.Type: GrantFiled: March 17, 2008Date of Patent: July 10, 2012Assignee: Daikin Industries, Ltd.Inventors: Masakazu Katou, Ryou Nakamoto, Keisuke Shimatani, Keiichi Yoshisaka, Masafumi Hashimoto
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Patent number: 8182245Abstract: A boot capacitor that functions as an operating power supply for a high-arm-side transistor provided in an inverter has to be charged prior to normal operation of a motor. This operation of charging the boot capacitor is performed at a carrier frequency that is lower than a carrier frequency for the normal operation.Type: GrantFiled: January 7, 2008Date of Patent: May 22, 2012Assignee: Daikin Industries, Ltd.Inventors: Hirohito Maeda, Keisuke Shimatani, Masakazu Katou, Takeomi Ukai, Hironobu Mizobe, Nobuki Kitano
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Patent number: 8102686Abstract: An electric power supply circuit includes a diode bridge circuit (12) for rectifying an alternating current, a switching element (S) for causing a short-circuit for output power of the diode bridge circuit (12), and a PAM control section (15) for causing the switching element (S) to perform switching with a predetermined timing so that a waveform of an input current approximates to a sine wave. The PAM control section (15) outputs ON/OFF pulses so that five pulses are output for each zero-cross point and one of the five pulses located in center extends over the zero-cross point at any time.Type: GrantFiled: March 18, 2008Date of Patent: January 24, 2012Assignee: Daikin Industries, Ltd.Inventors: Masakazu Katou, Ryou Nakamoto, Keisuke Shimatani, Keiichi Yoshisaka, Masafumi Hashimoto
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Publication number: 20100232983Abstract: A boot capacitor that functions as an operating power supply for a high-arm-side transistor provided in an inverter has to be charged prior to normal operation of a motor. This operation of charging the boot capacitor is performed at a carrier frequency that is lower than a carrier frequency for the normal operation.Type: ApplicationFiled: January 7, 2008Publication date: September 16, 2010Inventors: Hirohito Maeda, Keisuke Shimatani, Masakazu Katou, Takeomi Ukai, Hironobu Mizobe, Nobuki Kitano
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Publication number: 20100073977Abstract: An increase in a ripple voltage of a capacitor in a smoothing circuit is prevented to achieve a compact capacitor and cost reduction for capacitors in an electric power supply circuit which performs PAM control using a switching element. An electric power supply circuit includes a bridge circuit (12) for rectifying alternating current power, a smoothing circuit (13) which has two capacitors (C1 and C2) serially connected to each other, and a PAM control section (15) for turning a switching element (S) on and off at a predetermined timing. The PAM control section (15) includes a phase difference detection section (15d) which detects a phase shift of a PAM waveform based on a change in a voltage difference between the two capacitors (C1 and C2), and a phase correction section (15e) which corrects the phase of the PAM waveform so that an input current has a sine waveform.Type: ApplicationFiled: March 31, 2008Publication date: March 25, 2010Applicant: Daikin Industries, Ltd.Inventors: Ryou Nakamoto, Masafumi Hashimoto, Keisuke Shimatani, Keiichi Yoshisaka, Masakazu Katou
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Publication number: 20100061128Abstract: An electric power supply circuit includes a switching element (S) for causing a short-circuit for output power of a diode bridge circuit (12), a zero-cross detector section (5a) for detecting a point at which an input voltage reaches a level equal to or lower than a reference level, a timer section (5d) for starting a count upon the detection by the zero-cross detector section (5a), and a PAM waveform output section (5c) for causing the switching element (S) to perform switching with a predetermined output timing so that a waveform of the input current is caused to approximate to a sine wave. The circuit further includes a correction section (5e) for correcting, when a difference between a detection interval from detection to detection by the zero-cross detector section (5a), and an average value for detection intervals up to current detection occurs, an initial value of the count of the timer section (5d) according to the difference.Type: ApplicationFiled: March 18, 2008Publication date: March 11, 2010Inventors: Ryou Nakamoto, Masafumi Hashimoto, Keisuke Shimatani, Keiichi Yoshisaka, Masakazu Katou
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Publication number: 20100061127Abstract: The power supply device according to the present invention converts alternating-current power into direct-current power, and supplies the direct-current power to a load. Further, the power supply device includes a buffer, a control section, a rectifier circuit, a smoothing circuit, and a switch. After a predetermined zero cross point is detected, the control section uses in common, over a predetermined period of the alternating-current power, predetermined parameters retained in the buffer in calculating a timing at which a PAM interrupt pulse is generated.Type: ApplicationFiled: March 17, 2008Publication date: March 11, 2010Inventors: Masakazu Katou, Ryou Nakamoto, Keisuke Shimatani, Keiichi Yoshisaka, Masafumi Hashimoto
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Publication number: 20100014334Abstract: An electric power supply circuit includes a diode bridge circuit (12) for rectifying an alternating current, a switching element (S) for causing a short-circuit for output power of the diode bridge circuit (12), and a PAM control section (15) for causing the switching element (S) to perform switching with a predetermined timing so that a waveform of an input current approximates to a sine wave. The PAM control section (15) outputs ON/OFF pulses so that five pulses are output for each zero-cross point and one of the five pulses located in center extends over the zero-cross point at any time.Type: ApplicationFiled: March 18, 2008Publication date: January 21, 2010Inventors: Masakazu Katou, Ryou Nakamoto, Keisuke Shimatani, Keiichi Yoshisaka, Masafumi Hashimoto