Patents by Inventor Takahiro Yoshino
Takahiro Yoshino 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: 8768601Abstract: In a control device for an internal combustion engine includes an intake valve, a variable valve mechanism capable of controlling a closing timing and an operating angle of the intake valve continuously and variably, a detection unit for detecting a possibility of pre-ignition, and a throttle for controlling an intake air amount such that when the possibility of pre-ignition is detected, the intake valve closing timing is retarded from bottom dead center by increasing the intake valve operating angle, the control device includes, an operating angle upper limit limiting value calculation unit that calculates an operating angle upper limit limiting value for limiting an upper limit value of the intake valve operating angle, and a throttle opening upper limit limiting value calculation unit that calculates a throttle opening upper limit limiting value for limiting an upper limit value of a throttle opening on the basis of the intake valve operating angle.Type: GrantFiled: June 9, 2009Date of Patent: July 1, 2014Assignee: Nissan Motor Co., Ltd.Inventors: Takahiro Yoshino, Masahiro Arai, Yuzo Kageyama
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Patent number: 8753419Abstract: Chrome-containing molten iron and slag are to be obtained in an electric furnace operation using CaF2-free slag. In order to reduce and collect chrome from the slag while simultaneously promoting desulfurization of molten iron, a chrome-containing molten iron produced in an electric furnace and having a Cr content of from 8.0 to 35.0% by mass, and a CaF2-free electric furnace slag formed during the molten iron production, including Cr2O3, SiO2 and CaO as the constituent components and having a basicity CaO/SiO2 of from 0.7 to 1.7, are mechanically stirred with an impeller in a refining vessel. A metal Al-containing substance and CaO are put into the vessel before the end of stirring to thereby control the basicity of the slag after the end of stirring to at least 1.Type: GrantFiled: December 8, 2010Date of Patent: June 17, 2014Assignee: Nisshin Steel Co., Ltd.Inventors: Takahiro Yoshino, Masakazu Mori
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Patent number: 8753423Abstract: A method for stirring chrome-containing molten iron comprises mechanically stirring chrome-containing molten iron contained in a refining vessel by the use of an impeller having a rotation axis in the vertical direction where the refining vessel is such that the horizontal cross section of the inner wall thereof is circular around the central axis of the vessel in the vertical direction and the impeller, as integrated with the axial rod covered with a refractory, rotates around the central axis of the axial rod, as the rotation axis thereof. The stirring mode is regularly or irregularly switched between a concentric stirring of the molten iron in a state where the rotation axis of the impeller is centered in the central axis of the vessel and an eccentric stirring of the molten iron in a state where the rotation axis of the impeller is decentered from the central axis of the vessel.Type: GrantFiled: December 8, 2010Date of Patent: June 17, 2014Assignee: Nisshin Steel Co., Ltd.Inventors: Masayuki Sugiura, Masakazu Mori, Takahiro Yoshino
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Publication number: 20140055108Abstract: A power supply device that includes a switch circuit to which an input voltage is supplied, a coil coupled between the switch circuit and an output terminal from which an output voltage is outputted. A voltage adding circuit adds a slope voltage to a reference voltage. A control unit compares a feedback voltage corresponding to the output voltage and the reference voltage and switches the switch circuit at a timing corresponding to a comparison result of the feedback voltage and the reference voltage. A slope adjustment circuit differentiates a current flowing in the coil and adjusts a slope amount of the slope based on a differentiation result of the current.Type: ApplicationFiled: November 1, 2013Publication date: February 27, 2014Applicant: Spansion LLCInventors: Shinichiro SUGA, Kenta Ido, Tomohiro Suzuki, Hiroaki Sumiya, Katsuyuki Yasukouchi, Takahiro Yoshino
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Patent number: 8593126Abstract: A power supply device that includes a switch circuit to which an input voltage is supplied, a coil coupled between the switch circuit and an output terminal from which an output voltage is outputted. A voltage adding circuit adds a slope voltage to a reference voltage. A control unit compares a feedback voltage corresponding to the output voltage and the reference voltage and switches the switch circuit at a timing corresponding to a comparison result of the feedback voltage and the reference voltage. A slope adjustment circuit differentiates a current flowing in the coil and adjusts a slope amount of the slope based on a differentiation result of the current.Type: GrantFiled: May 15, 2012Date of Patent: November 26, 2013Assignee: Spansion LLCInventors: Shinichiro Suga, Kenta Ido, Tomohiro Suzuki, Hiroaki Sumiya, Katsuyuki Yasukouchi, Takahiro Yoshino
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Patent number: 8570021Abstract: A DC/DC converter includes a first comparator configured to compare an output voltage to a reference voltage; a pulse generator circuit configured to generate a pulse signal when triggered by an output signal from the first comparator; a first switch circuit configured to open and close on the basis of the pulse signal; an output voltage generator configured to generate the output voltage on the basis of an input voltage supplied via the first switch circuit; a delay generator circuit configured to delay the output signal from the first comparator before outputting; and an error amplifier configured to control a delay time of the delay generator circuit on the basis of a potential difference between the output voltage and the reference voltage.Type: GrantFiled: June 14, 2010Date of Patent: October 29, 2013Assignee: Spansion LLCInventor: Takahiro Yoshino
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Publication number: 20130025413Abstract: Chrome-containing molten iron and slag are to be obtained in an electric furnace operation using CaF2-free slag. In order to reduce and collect chrome from the slag while simultaneously promoting desulfurization of molten iron, a chrome-containing molten iron produced in an electric furnace and having a Cr content of from 8.0 to 35.0% by mass, and a CaF2-free electric furnace slag formed during the molten iron production, including Cr2O3, SiO2 and CaO as the constituent components and having a basicity CaO/SiO2 of from 0.7 to 1.7, are mechanically stirred with an impeller in a refining vessel. A metal Al-containing substance and CaO are put into the vessel before the end of stirring to thereby control the basicity of the slag after the end of stirring to at least 1.Type: ApplicationFiled: December 8, 2010Publication date: January 31, 2013Applicant: NISSHIN STEEL CO., LTD.Inventors: Takahiro Yoshino, Masakazu Mori
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Publication number: 20120306465Abstract: A power supply device that includes a switch circuit to which an input voltage is supplied, a coil coupled between the switch circuit and an output terminal from which an output voltage is outputted. A voltage adding circuit adds a slope voltage to a reference voltage. A control unit compares a feedback voltage corresponding to the output voltage and the reference voltage and switches the switch circuit at a timing corresponding to a comparison result of the feedback voltage and the reference voltage. A slope adjustment circuit differentiates a current flowing in the coil and adjusts a slope amount of the slope based on a differentiation result of the current.Type: ApplicationFiled: May 15, 2012Publication date: December 6, 2012Applicant: FUJITSU SEMICONDUCTOR LIMITEDInventors: Shinichiro SUGA, Kenta IDO, Tomohiro SUZUKI, Hiroaki SUMIYA, Katsuyuki YASUKOUCHI, Takahiro YOSHINO
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Publication number: 20120293026Abstract: To provide a drive device rigid enough to endure a stress due to a reaction during driving of an arm unit, and to provide a conveyance device including the same. A drive device includes a frame and an actuator installed in the frame. The frame is formed by integral molding by casting. The frame includes a connecting portion connectable to a division wall of a conveyance chamber, a bottom plate portion serving as an opposed portion provided to be opposed to the connecting portion, and a plurality of coupling portions that couple the connecting portion and the bottom plate portion to each other. The actuator includes three coaxial shafts (two rotating shafts and single turning shaft), three motors, and a transmission mechanism that transmits a rotational driving force by the three motors to the three shafts. The frame is formed by the integral molding, and hence it is possible to realize a drive device having a high rigidity.Type: ApplicationFiled: December 22, 2010Publication date: November 22, 2012Applicant: ULVAC, INC.Inventors: Hirotoshi Nakao, Muneyoshi Nishitsuji, Takahiro Yoshino, Takuya Kuriyama, Taiji Chiba, Daisuke Kawakubo, Kiyotaka Yamada
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Publication number: 20120260773Abstract: A method for stirring chrome-containing molten iron comprises mechanically stirring chrome-containing molten iron contained in a refining vessel by the use of an impeller having a rotation axis in the vertical direction where the refining vessel is such that the horizontal cross section of the inner wall thereof is circular around the central axis of the vessel in the vertical direction and the impeller, as integrated with the axial rod covered with a refractory, rotates around the central axis of the axial rod, as the rotation axis thereof. The stirring mode is regularly or irregularly switched between a concentric stirring of the molten iron in a state where the rotation axis of the impeller is centered in the central axis of the vessel and an eccentric stirring of the molten iron in a state where the rotation axis of the impeller is decentered from the central axis of the vessel.Type: ApplicationFiled: December 8, 2010Publication date: October 18, 2012Applicant: NISSHIN STEEL CO., LTD.Inventors: Masayuki Sugiura, Masakazu Mori, Takahiro Yoshino
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Patent number: 8165784Abstract: In a variable valve unit provided with a variable valve mechanism that varies opening characteristics of an engine valve by rotary motion of a control shaft, an actuator that generates a rotary motion of the control shaft, a stopper restricting the rotary motion of the control shaft, and an angle sensor capable of outputting signals corresponding to angle positions of the control shaft, when the signal of the angle sensor at an angle position where the rotation of the control shaft is restricted by the stopper are learned, the actuator is controlled such that the control shaft is pressed against the stopper, after which drive torque of the actuator is reduced and with the drive torque reduced, signals of the then-angle sensor are stored.Type: GrantFiled: December 20, 2007Date of Patent: April 24, 2012Assignee: Hitachi, Ltd.Inventors: Naoki Okamoto, Masahiro Arai, Hatsuo Nagaishi, Yuko Nagaishi, legal representative, Takahiro Yoshino
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Publication number: 20110106410Abstract: In a control device for an internal combustion engine includes an intake valve, a variable valve mechanism capable of controlling a closing timing and an operating angle of the intake valve continuously and variably, a detection unit for detecting a possibility of pre-ignition, and a throttle for controlling an intake air amount such that when the possibility of pre-ignition is detected, the intake valve closing timing is retarded from bottom dead center by increasing the intake valve operating angle, the control device includes, an operating angle upper limit limiting value calculation unit that calculates an operating angle upper limit limiting value for limiting an upper limit value of the intake valve operating angle, and a throttle opening upper limit limiting value calculation unit that calculates a throttle opening upper limit limiting value for limiting an upper limit value of a throttle opening on the basis of the intake valve operating angle.Type: ApplicationFiled: June 9, 2009Publication date: May 5, 2011Inventors: Takahiro Yoshino, Masahiro Arai, Yuzo Kageyama
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Publication number: 20100320991Abstract: A DC/DC converter includes a first comparator configured to compare an output voltage to a reference voltage; a pulse generator circuit configured to generate a pulse signal when triggered by an output signal from the first comparator; a first switch circuit configured to open and close on the basis of the pulse signal; an output voltage generator configured to generate the output voltage on the basis of an input voltage supplied via the first switch circuit; a delay generator circuit configured to delay the output signal from the first comparator before outputting; and an error amplifier configured to control a delay time of the delay generator circuit on the basis of a potential difference between the output voltage and the reference voltage.Type: ApplicationFiled: June 14, 2010Publication date: December 23, 2010Applicant: FUJITSU SEMICONDUCTOR LIMITEDInventor: Takahiro Yoshino
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Patent number: 7675267Abstract: This invention aims at providing a control circuit of power supply in which a secondary battery and a device are connected in parallel, to output capable of preventing over-charging of the secondary battery and supplying power from the secondary battery to the device, and a control method of the power supply. A device 5G and a secondary battery 2G are connected to a DC-DC converter 1G in parallel. The device 5G is supplied with both a power from the DC-DC converter 1G and a power from the secondary battery 2G. When the secondary battery 2G is in non-charging state, an offset circuit 15G supplies a positive offset for reducing a difference of voltage between a detection signal Vx1G and reference voltage e1G to a reference voltage e1G corresponding to a charging inhibit signal CAS.Type: GrantFiled: September 27, 2006Date of Patent: March 9, 2010Assignee: Fujitsu Microelectronics LimitedInventors: Hidekiyo Ozawa, Takashi Matsumoto, Takahiro Yoshino, Toru Nakamura
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Patent number: 7663345Abstract: A DC-DC converter for generating a stable output voltage and being applicable to a transient load fluctuation. The DC-DC converter detects an input current, and compares the input current with a rated current of an external power supply. The DC-DC converter controls a positive charging current that is supplied to a secondary battery in accordance with a consumption current of a load so that the input current does not exceed the rated current. The DC-DC converter further controls a negative charging current that is supplied from the secondary battery to the load when the load requires an input current exceeding the rated current.Type: GrantFiled: August 30, 2006Date of Patent: February 16, 2010Assignee: Fujitsu Microelectronics LimitedInventors: Hidekiyo Ozawa, Takashi Matsumoto, Takahiro Yoshino
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Patent number: 7513229Abstract: At the time of obtaining a difference in intake air amount between right and left banks in a V-type engine, a target value of a lift-amount/operation-angle-varying mechanism provided for each of the banks is set to a target value at which flow velocity of intake air passing through an intake valve becomes almost sound velocity. In a state in which the flow velocity of intake air passing through the intake valve becomes almost sound velocity, a difference in the intake air amount in the right and left banks is detected and, to reduce the difference, a correction value for a target value of a valve lift is set for each of the banks.Type: GrantFiled: January 25, 2007Date of Patent: April 7, 2009Assignee: Hitachi, Ltd.Inventors: Ryo Miyakoshi, Kenichi Machida, Takahiro Yoshino, Masahiro Arai, Hatsuo Nagaishi
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Patent number: D625748Type: GrantFiled: May 6, 2010Date of Patent: October 19, 2010Assignee: Ulvac, Inc.Inventor: Takahiro Yoshino
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Patent number: D639323Type: GrantFiled: May 6, 2010Date of Patent: June 7, 2011Assignee: Ulvac, Inc.Inventor: Takahiro Yoshino
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Patent number: RE43781Type: GrantFiled: December 22, 2011Date of Patent: November 6, 2012Assignee: Ulvac, Inc.Inventor: Takahiro Yoshino
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Patent number: RE44567Type: GrantFiled: December 22, 2011Date of Patent: November 5, 2013Assignee: Ulvac, Inc.Inventor: Takahiro Yoshino