Patents by Inventor Takafumi Nonaka
Takafumi Nonaka 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: 10615681Abstract: A rectifying element is connected to an auxiliary winding. The shut-down circuit receives a bias voltage output from the rectifying element. A shut-down circuit stops supply of power to a power supply terminal of the power supply control IC when the bias voltage is less than a set voltage. A power supply control IC controls a ratio of on-time to a switching cycle of the switching element, based on a current sensing voltage generated at a current sense resistor. The power supply control IC causes the switching operation of the switching element to stop when a voltage at the power supply terminal decreases to a stop voltage or less.Type: GrantFiled: May 19, 2017Date of Patent: April 7, 2020Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Takafumi Nonaka, Kentaro Oshima, Teruyoshi Sato, Norihiro Suzuki
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Publication number: 20190207507Abstract: A rectifying element is connected to an auxiliary winding. The shut-down circuit receives a bias voltage output from the rectifying element. A shut-down circuit stops supply of power to a power supply terminal of the power supply control IC when the bias voltage is less than a set voltage. A power supply control IC controls a ratio of on-time to a switching cycle of the switching element, based on a current sensing voltage generated at a current sense resistor. The power supply control IC causes the switching operation of the switching element to stop when a voltage at the power supply terminal decreases to a stop voltage or less.Type: ApplicationFiled: May 19, 2017Publication date: July 4, 2019Applicant: Mitsubishi Electric CorporationInventors: Takafumi NONAKA, Kentaro OSHIMA, Teruyoshi SATO, Norihiro SUZUKI
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Patent number: 10066767Abstract: A method of making a rubber hose includes the steps of providing an inner rubber layer including a hollow part, and forming a first braided layer on the inner rubber layer by braiding a plurality of first yarn materials including a vinylon fiber made by a dry process such that the braided first yarn materials includes a braid formed in a three-over, three-under pattern. Next, a middle rubber layer is formed on the first braided layer. A second braided layer is then formed on the middle rubber layer by braiding a plurality of second yarn materials including a vinylon fiber made by a wet process such that the braided second yarn materials includes a braid formed in a two-over, two-under pattern. Finally, an outer rubber layer is formed on the second braided layer.Type: GrantFiled: January 13, 2016Date of Patent: September 4, 2018Assignee: HITACHI METALS, LTD.Inventors: Takafumi Nonaka, Tomonori Saito, Tomonori Shibata
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Publication number: 20160131283Abstract: A method of making a rubber hose includes the steps of providing an inner rubber layer including a hollow part, and forming a first braided layer on the inner rubber layer by braiding a plurality of first yarn materials including a vinylon fiber made by a dry process such that the braided first yarn materials includes a braid formed in a three-over, three-under pattern. Next, a middle rubber layer is formed on the first braided layer. A second braided layer is then formed on the middle rubber layer by braiding a plurality of second yarn materials including a vinylon fiber made by a wet process such that the braided second yarn materials includes a braid formed in a two-over, two-under pattern. Finally, an outer rubber layer is formed on the second braided layer.Type: ApplicationFiled: January 13, 2016Publication date: May 12, 2016Inventors: Takafumi NONAKA, Tomonori SAITO, Tomonori SHIBATA
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Publication number: 20140326355Abstract: A rubber hose includes an inner rubber layer including a hollow part, an first braided layer formed on the inner rubber layer by braiding a plurality of first yarn materials, a middle rubber layer formed on the first braided layer, a second braided layer formed on the middle rubber layer by braiding a plurality of second yarn materials, and an outer rubber layer formed on the second braided layer. The first braided layer is formed by braiding the plurality of first yarn materials including a vinylon fiber made by a dry process such that the braided first yarn materials includes a braid formed in a three-over, three-under pattern. The second braided layer is formed by braiding the plurality of second yarn materials including a vinylon fiber made by a wet process such that the braided second yarn materials includes a braid formed in a two-over, two-under pattern.Type: ApplicationFiled: May 1, 2014Publication date: November 6, 2014Applicant: Hitachi Metals, Ltd.Inventors: Takafumi NONAKA, Tomonori SAITO, Tomonori SHIBATA
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Patent number: 8710750Abstract: A power supply circuit drives circuits having different numbers of series-connected LEDs without changing a circuit constant or a component. An LED series circuit is connected to a power converter circuit of a power supply circuit. The power converter circuit is controlled by a control arithmetic circuit, and supplies a constant current to the LED series circuit. A voltage detection circuit detects a voltage applied to the LED series circuit. The control arithmetic circuit checks whether the LED series circuit has 40 LEDs or 20 LEDs, based on the voltage detected by the voltage detection circuit. The control arithmetic circuit holds a constant-current value table for 40 LEDs and a constant-current value table for 20 LEDs. In accordance with the detected voltage, the control arithmetic circuit selects one constant-current value table, and controls the power converter circuit based on the constant-current value table selected.Type: GrantFiled: October 17, 2011Date of Patent: April 29, 2014Assignee: Mitsubishi Electric CorporationInventors: Takafumi Nonaka, Takashi Kumagai, Yuichiro Ito, Haruka Kinoshita, Shinsuke Funayama, Takashi Maeda
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Publication number: 20130000767Abstract: A method of manufacturing a rubber hose that includes an inner rubber tube having a hollow portion, first and second braided layers formed by braiding strands, and an outer rubber tube. The method includes forming a laminated structure by sequentially forming the first braided layer on the inner rubber tube, a thermoplastic resin layer including a thermoplastic resin on the first braided layer, the second braided layer on the thermoplastic resin layer and the outer rubber tube on the second braided layer, vulcanizing the inner rubber tube and the outer rubber tube and softening the thermoplastic resin layer by heating the laminated structure to not lower than a softening temperature of the thermoplastic resin layer, and integrating the first and second braided layers by softening the thermoplastic resin layer and then solidifying the soft thermoplastic resin penetrated into mesh openings formed between the strands.Type: ApplicationFiled: June 28, 2012Publication date: January 3, 2013Applicant: Hitachi Cable, Ltd.Inventors: Takafumi NONAKA, Tomonori SAITO, Tsutomu KANNO, Tomonori SHIBATA, Shunsuke TODA
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Patent number: 8265820Abstract: A saddle riding type vehicle includes a support mechanism arranged to support a pair of wheels to be movable up and down relative to a vehicle body, a lock mechanism connectable to the support mechanism and arranged to limit up-and-down motion of the pair of wheels, various sensors arranged to detect vehicle states, and a controller arranged to control the lock mechanism based on results of detection by the various sensors. The controller controls the lean limitation to the up-and-down motion of the pair of wheels and its cancellation automatically. The rider need not carry out a special control for operating the lock mechanism. In addition, the lock mechanism is controlled according to the vehicle states, which allows the rider to travel lightly and comfortably.Type: GrantFiled: May 26, 2009Date of Patent: September 11, 2012Assignee: Yamaha Hatsudoki Kabushiki KaishaInventors: Nobuo Hara, Kenichi Watanabe, Yasuhiro Oomura, Takafumi Nonaka
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Publication number: 20120187863Abstract: A power supply circuit drives circuits having different numbers of series-connected LEDs without changing a circuit constant or a component. An LED series circuit is connected to a power converter circuit of a power supply circuit. The power converter circuit is controlled by a control arithmetic circuit, and supplies a constant current to the LED series circuit. A voltage detection circuit detects a voltage applied to the LED series circuit. The control arithmetic circuit checks whether the LED series circuit has 40 LEDs or 20 LEDs, based on the voltage detected by the voltage detection circuit. The control arithmetic circuit holds a constant-current value table for 40 LEDs and a constant-current value table for 20 LEDs. In accordance with the detected voltage, the control arithmetic circuit selects one constant-current value table, and controls the power converter circuit based on the constant-current value table selected.Type: ApplicationFiled: October 17, 2011Publication date: July 26, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Takafumi NONAKA, Takashi KUMAGAI, Yuichiro ITO, Haruka KINOSHITA, Shinsuke FUNAYAMA, Takashi MAEDA
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Patent number: 8004204Abstract: A series load circuit is a circuit formed by connecting a light-emitting device unit 851 (the first load circuit) and a light-emitting device unit 852 (the second load circuit) in series. A voltage generating circuit 111 generates voltage to be applied to the series load circuit. A current detecting circuit 112 detects electric current flowing through the light-emitting device unit 851. A controlling circuit 114 controls the voltage generating circuit 111 so that the electric current detected by the current detecting circuit 112 becomes a predetermined current value.Type: GrantFiled: June 15, 2009Date of Patent: August 23, 2011Assignees: Mitsubishi Electric Corporation, Mitsubishi Electric Lighting CorporationInventors: Takafumi Nonaka, Takashi Kumagai, Noriyuki Matsubara, Kazuo Ban, Koichi Saito
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Publication number: 20100194307Abstract: A series load circuit is a circuit formed by connecting a light-emitting device unit 851 (the first load circuit) and a light-emitting device unit 852 (the second load circuit) in series. A voltage generating circuit 111 generates voltage to be applied to the series load circuit. A current detecting circuit 112 detects electric current flowing through the light-emitting device unit 851. A controlling circuit 114 controls the voltage generating circuit 111 so that the electric current detected by the current detecting circuit 112 becomes a predetermined current value.Type: ApplicationFiled: June 15, 2009Publication date: August 5, 2010Applicants: Mitsubishi Electric Corporation, Mitsubishi Electric Lighting CorporationInventors: Takafumi Nonaka, Takashi Kumagai, Noriyuki Matsubara, Kazuo Ban, Koichi Saito
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Publication number: 20090299565Abstract: A saddle riding type vehicle includes a support mechanism arranged to support a pair of wheels to be movable up and down relative to a vehicle body, a lock mechanism connectable to the support mechanism and arranged to limit up-and-down motion of the pair of wheels, various sensors arranged to detect vehicle states, and a controller arranged to control the lock mechanism based on results of detection by the various sensors. The controller controls the lean limitation to the up-and-down motion of the pair of wheels and its cancellation automatically. The rider need not carry out a special control for operating the lock mechanism. In addition, the lock mechanism is controlled according to the vehicle states, which allows the rider to travel lightly and comfortably.Type: ApplicationFiled: May 26, 2009Publication date: December 3, 2009Applicant: Yamaha Hatsudoki Kabushiki KaishaInventors: Nobuo Hara, Kenichi Watanabe, Yasuhiro Oomura, Takafumi Nonaka