Patents by Inventor Masafumi Otsuka
Masafumi Otsuka 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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Publication number: 20240123782Abstract: A suspension arm includes a main body. The main body includes a curved portion curved along a longitudinal direction and has a closed section. The main body includes an inner side wall, an outer side wall, a first side wall, and a second side wall. The inner side wall corresponds to an inner side of a curve of the curved portion. The outer side wall corresponds to an outer side of the curve of the curved portion. A thickness of the inner side wall is larger than a thickness of the outer side wall. In sectional view of the main body perpendicular to the longitudinal direction, each of a length of the first side wall and a length of the second side wall is longer than each of a length of the inner side wall and a length of the outer side wall.Type: ApplicationFiled: March 28, 2022Publication date: April 18, 2024Applicant: NIPPON STEEL CORPORATIONInventors: Kenichiro OTSUKA, Masafumi AZUMA, Koichi HAMADA, Ryo TABATA, Ryo URUSHIBATA, Yuki KITAHARA
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Publication number: 20240100583Abstract: Provided is a burring processing method, which is a method for forming a buffing processed portion including a raised portion and a curved portion in a metal component having a pilot hole formed therein, the method being characterized by including: a preforming step of enlarging a diameter of the pilot hole, moving an edge portion of the pilot hole relative to the metal component in a first direction of a thickness direction of the metal component in a first range around the pilot hole of the metal component, and forming the whole first range into a preformed portion raised from the metal component in the first direction; and a main forming step of deforming the preformed portion in a second direction opposite to the first direction, forming a second range on an outer diameter side of the preformed portion to have the same height as the first range in the first direction, and forming part of a third range on an inner diameter side of the preformed portion from the second range to be part of the curved portionType: ApplicationFiled: January 12, 2022Publication date: March 28, 2024Applicant: NIPPON STEEL CORPORATIONInventors: Kenichiro OTSUKA, Masafumi AZUMA, Koichi HAMADA, Ryo TABATA, Ryo URUSHIBATA, Yuuki KITAHARA
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Patent number: 10742021Abstract: According to an embodiment, a power circuit supplying a voltage or a current from an output terminal to a load comprises a first circuit, a second circuit, an inductor, a fifth switching element, and a control circuit. The control circuit is configured to bring the fifth switching element into conduction when switching control on at least two of the first to fourth switching elements is to be executed according to an output to the load connected via the output terminal, and bring the fifth switching element into non-conduction after a delay time passes from a time the first to fourth switching elements have been brought into non-conduction when the first to fourth switching elements are to be brought into non-conduction.Type: GrantFiled: September 10, 2019Date of Patent: August 11, 2020Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage CorporationInventors: Masafumi Otsuka, Yuji Yamanaka
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Patent number: 10476389Abstract: A switching power supply apparatus of each embodiment includes: a switch circuit configured to supply a pulse output to a load; a drive signal control circuit configured to perform ON/OFF driving operation of the switch circuit according to a duty ratio of a PWM signal; an error detection amplifier configured to compare output voltage supplied to the load and reference voltage and generate an error detection signal; a comparator configured to generate the PWM signal by comparison between a slope signal that starts level change in a cycle of the PWM signal and the error detection signal and give the PWM signal to the drive signal control circuit; and a spread spectrum correction circuit configured to generate an offset corresponding to the fluctuation of the cycle of the PWM signal and add the generated offset to the slope signal or the error detection signal.Type: GrantFiled: March 16, 2018Date of Patent: November 12, 2019Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage CorporationInventor: Masafumi Otsuka
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Publication number: 20190097535Abstract: A switching power supply apparatus of each embodiment includes: a switch circuit configured to supply a pulse output to a load; a drive signal control circuit configured to perform ON/OFF driving operation of the switch circuit according to a duty ratio of a PWM signal; an error detection amplifier configured to compare output voltage supplied to the load and reference voltage and generate an error detection signal; a comparator configured to generate the PWM signal by comparison between a slope signal that starts level change in a cycle of the PWM signal and the error detection signal and give the PWM signal to the drive signal control circuit; and a spread spectrum correction circuit configured to generate an offset corresponding to the fluctuation of the cycle of the PWM signal and add the generated offset to the slope signal or the error detection signal.Type: ApplicationFiled: March 16, 2018Publication date: March 28, 2019Inventor: Masafumi Otsuka
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Patent number: 9660459Abstract: The voltage regulator includes a resistor circuit that switches between a first state and a second state according to the comparison result signal. In the first state, a resistance between a second end of a first controlling transistor and a fixed potential is set at a first resistance, and a second end of a second controlling transistor and the fixed potential are disconnected from each other. In the second state, the second end of the first controlling transistor and the fixed potential are disconnected from each other, and a resistance between the second end of the second controlling transistor and the fixed potential is set at a second resistance.Type: GrantFiled: September 8, 2014Date of Patent: May 23, 2017Assignee: Kabushiki Kaisha ToshibaInventors: Masafumi Otsuka, Hirotoshi Aizawa, Takaya Yasuda
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Publication number: 20150263533Abstract: The voltage regulator includes a resistor circuit that switches between a first state and a second state according to the comparison result signal. In the first state, a resistance between a second end of a first controlling transistor and a fixed potential is set at a first resistance, and a second end of a second controlling transistor and the fixed potential are disconnected from each other. In the second state, the second end of the first controlling transistor and the fixed potential are disconnected from each other, and a resistance between the second end of the second controlling transistor and the fixed potential is set at a second resistance.Type: ApplicationFiled: September 8, 2014Publication date: September 17, 2015Inventors: Masafumi Otsuka, Hirotoshi Aizawa, Takaya Yasuda
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Patent number: 9048731Abstract: A rectifying apparatus (power receiving apparatus) 100 is configured to receive electric power output from the power transmitting apparatus 101. The rectifying apparatus 100 is mobile equipment, such as a battery, a smartphone incorporating a battery and a tablet PC, or equipment for a battery charger connected to the equipment. The rectifying apparatus (power receiving apparatus) 100 may be any other equipment that receives electric power output from the associated power transmitting apparatus 101, including a rechargeable electric car, a household appliance and a product for underwater application.Type: GrantFiled: January 29, 2014Date of Patent: June 2, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Masafumi Otsuka, Hirotoshi Aizawa, Toru Takayama
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Publication number: 20150069848Abstract: A power receiving unit includes a hysteresis comparator, includes a comparison voltage based on an output voltage at an output terminal and a first reference voltage and outputs a comparison result signal responsive to a result of the comparison. The power receiving unit includes a current operational amplifier that receives a converted voltage based on a current flowing through an output transistor and a preset second reference voltage and outputs a current error signal responsive to the difference between the converted voltage and the second reference voltage. The power receiving unit includes a first multiplexer that receives the current error signal and the comparison result signal, selects either of the comparison result signal and the current error signal based on the comparison result signal and outputs the selected signal. The output transistor is controlled based on a first output signal selected by the first multiplexer.Type: ApplicationFiled: January 29, 2014Publication date: March 12, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kosuke Tashiro, Hirotoshi Aizawa, Masafumi Otsuka
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Patent number: 8963522Abstract: According to one embodiment, a circuit includes an amplifier, first and second capacitors, a switch and a monitoring-comparator. The amplifier amplifies source and drain voltages to output first and second amplified-signals. The first and second capacitors are connected to the amplifier's first and second terminals. The first and second amplified-signals are outputted from the first and second terminals. The switch forms first and second loops when a switching-transistor is OFF. The switch supplies a common-reference-voltage to the first and second loops to store charge in the first and second capacitors. The switch ends the first and second loops based on a gate-signal when the switching-transistor is ON. The monitoring-comparator compares first and second inputs. The monitoring-comparator outputs a signal depending on a comparison result when the switching-transistor is ON. The first and second inputs are input through the first and second capacitors.Type: GrantFiled: January 23, 2012Date of Patent: February 24, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Masafumi Otsuka, Yoichi Tokai
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Publication number: 20150003128Abstract: A rectifying apparatus (power receiving apparatus) 100 is configured to receive electric power output from the power transmitting apparatus 101. The rectifying apparatus 100 is mobile equipment, such as a battery, a smartphone incorporating a battery and a tablet PC, or equipment for a battery charger connected to the equipment. The rectifying apparatus (power receiving apparatus) 100 may be any other equipment that receives electric power output from the associated power transmitting apparatus 101, including a rechargeable electric car, a household appliance and a product for underwater application.Type: ApplicationFiled: January 29, 2014Publication date: January 1, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Masafumi Otsuka, Hirotoshi Aizawa, Toru Takayama
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Publication number: 20120235656Abstract: According to one embodiment, a circuit includes an amplifier, first and second capacitors, a switch and a monitoring-comparator. The amplifier amplifies source and drain voltages to output first and second amplified-signals. The first and second capacitors are connected to the amplifier's first and second terminals. The first and second amplified-signals are outputted from the first and second terminals. The switch forms first and second loops when a switching-transistor is OFF. The switch supplies a common-reference-voltage to the first and second loops to store charge in the first and second capacitors. The switch ends the first and second loops based on a gate-signal when the switching-transistor is ON. The monitoring-comparator compares first and second inputs. The monitoring-comparator outputs a signal depending on a comparison result when the switching-transistor is ON. The first and second inputs are input through the first and second capacitors.Type: ApplicationFiled: January 23, 2012Publication date: September 20, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Masafumi OTSUKA, Yoichi Tokai
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Patent number: 8207722Abstract: A boost DC/DC converter has a voltage dividing circuit connected between the output terminal and the ground, that outputs a divided voltage obtained by dividing the output voltage; a reference voltage generating circuit that generates a reference voltage based on the input voltage; an error amplifier that outputs a first signal corresponding to the difference between the divided voltage and the reference voltage; a feedforward circuit that detects the input voltage and outputs a second signal corresponding to a current inversely proportional to the input voltage; a multiplier that multiples the first signal by the second signal and outputs a third signal obtained; and a control circuit that outputs, based on the third signal, a control signal for controlling on/off of the switching transistor so that the divided voltage is equal to the reference voltage.Type: GrantFiled: August 25, 2009Date of Patent: June 26, 2012Assignee: Kabushiki Kaisha ToshibaInventors: Masafumi Otsuka, Yoichi Tokai, Ryo Tanifuji
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Publication number: 20110221415Abstract: According to one embodiment, a switching transistor changes, based on ON/OFF operations, the direction of an electric current flowing to an inductor. A gate driving unit applies a driving voltage to a gate of the switching transistor. A power-supply switching unit switches, based on a result of comparison of the input voltage and the output voltage, the voltage of a power supply that generates the driving voltage.Type: ApplicationFiled: March 7, 2011Publication date: September 15, 2011Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Masafumi Otsuka, Yoichi Tokai, Ryo Tanifuji
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Publication number: 20100052627Abstract: A boost DC/DC converter has a voltage dividing circuit connected between the output terminal and the ground, that outputs a divided voltage obtained by dividing the output voltage; a reference voltage generating circuit that generates a reference voltage based on the input voltage; an error amplifier that outputs a first signal corresponding to the difference between the divided voltage and the reference voltage; a feedforward circuit that detects the input voltage and outputs a second signal corresponding to a current inversely proportional to the input voltage; a multiplier that multiples the first signal by the second signal and outputs a third signal obtained; and a control circuit that outputs, based on the third signal, a control signal for controlling on/off of the switching transistor so that the divided voltage is equal to the reference voltage.Type: ApplicationFiled: August 25, 2009Publication date: March 4, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Masafumi Otsuka, Yoichi Tokai, Ryo Tanifuji
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Patent number: 7519716Abstract: One terminal device accepts provision information to be provided, and furthermore, recipient information relating to a recipient capable of receiving the provision information, and accepts a provision format of the provision information for each recipient. The accepted provision information, recipient information and provision format are transmitted to a central apparatus. In the case where a request of the provision information and the recipient information is transmitted from one of terminal devices, provision information corresponding to the registered provision format is provided to the one of terminal devices based on the received recipient information.Type: GrantFiled: December 27, 2001Date of Patent: April 14, 2009Assignee: FUJITSU LIMITEDInventors: Yoshiko Akazawa, Masanao Fukuichi, Masafumi Otsuka
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Patent number: 7313558Abstract: The central apparatus accepts headline information, authorized user information, and storage location information and stores the accepted browsable information etc. in association with the storage location information. When a user has transmitted identification information for identifying the user from his terminal apparatus to the central apparatus, the central apparatus receives the identification information. The central apparatus extracts the headline information and the storage location information based on the received identification information and the registered authorized user information. Based on the extracted headline information and storage location information, the central apparatus generates a hyperlink and then generates an HTML document containing the generated hyperlink. The generated document is then transmitted to the terminal apparatus of the user.Type: GrantFiled: December 27, 2001Date of Patent: December 25, 2007Assignee: Fujitsu LimitedInventors: Yoshiko Akazawa, Akinobu Miyamoto, Masafumi Otsuka
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Publication number: 20030065664Abstract: The central apparatus accepts headline information, authorized user information, and storage location information and stores the accepted browsable information etc. in association with the storage location information. When a user has transmitted identification information for identifying the user from his terminal apparatus to the central apparatus, the central apparatus receives the identification information. The central apparatus extracts the headline information and the storage location information based on the received identification information and the registered authorized user information. Based on the extracted headline information and storage location information, the central apparatus generates a hyperlink and then generates an HTML document containing the generated hyperlink. The generated document is then transmitted to the terminal apparatus of the user.Type: ApplicationFiled: December 27, 2001Publication date: April 3, 2003Applicant: Fujitsu Limited of Kawasaki, JapanInventors: Yoshiko Akazawa, Akinobu Miyamoto, Masafumi Otsuka
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Publication number: 20030065794Abstract: One terminal device accepts provision information to be provided, and furthermore, recipient information relating to a recipient capable of receiving the provision information, and accepts a provision format of the provision information for each recipient. The accepted provision information, recipient information and provision format are transmitted to a central apparatus. In the case where a request of the provision information and the recipient information is transmitted from one of terminal devices, provision information corresponding to the registered provision format is provided to the one of terminal devices based on the received recipient information.Type: ApplicationFiled: December 27, 2001Publication date: April 3, 2003Applicant: Fujitsu LimitedInventors: Yoshiko Akazawa, Masanao Fukuichi, Masafumi Otsuka