Patents by Inventor Masami Hirata
Masami Hirata 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).
-
Patent number: 9204573Abstract: In general, according to an embodiment, a power conversion apparatus includes a first inverter, second inverter and a cooler. The first inverter includes a plurality of semiconductor devices connected together in parallel per phase. In the second inverter, the number of parallel-connected semiconductor devices are two or more per phase, the semiconductor devices are connected together in parallel and the number of parallel-connected semiconductor devices in the second inverter is fewer than that in the first inverter per phase. The semiconductor devices in the first inverter are installed in an area of a cooling surface of the cooler positioned over a first channel. The semiconductor devices in the second inverter are installed in an area of the cooling surface positioned over the second channel.Type: GrantFiled: March 5, 2014Date of Patent: December 1, 2015Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Shoichiro Tanaka, Masami Hirata, Hideki Hisada
-
Publication number: 20140334102Abstract: In general, according to an embodiment, a power conversion apparatus includes a first inverter, second inverter and a cooler. The first inverter includes a plurality of semiconductor devices connected together in parallel per phase. In the second inverter, the number of parallel-connected semiconductor devices are two or more per phase, the semiconductor devices are connected together in parallel and the number of parallel-connected semiconductor devices in the second inverter is fewer than that in the first inverter per phase. The semiconductor devices in the first inverter are installed in an area of a cooling surface of the cooler positioned over a first channel. The semiconductor devices in the second inverter are installed in an area of the cooling surface positioned over the second channel.Type: ApplicationFiled: March 5, 2014Publication date: November 13, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Shoichiro TANAKA, Masami HIRATA, Hideki HISADA
-
Patent number: 8582335Abstract: An inverter apparatus according to one embodiment includes switching elements and freewheel diodes which are connected to a direct-current power supply, a temperature detector provided near at least one of the switching elements, and a temperature estimation unit. The temperature estimation unit estimates temperatures of switching elements not provided with the temperature detector, based on an estimated-temperature increase value calculated by a loss model of the switching elements and freewheel diode and others, and a temperature of the switching element detected by the temperature detector.Type: GrantFiled: May 1, 2012Date of Patent: November 12, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Ryuta Hasegawa, Hiroshi Mochikawa, Masami Hirata, Yukihiko Hatano
-
Publication number: 20120217795Abstract: An inverter apparatus according to one embodiment includes switching elements and freewheel diodes which are connected to a direct-current power supply, a temperature detector provided near at least one of the switching elements, and a temperature estimation unit. The temperature estimation unit estimates temperatures of switching elements not provided with the temperature detector, based on an estimated-temperature increase value calculated by a loss model of the switching elements and freewheel diode and others, and a temperature of the switching element detected by the temperature detector.Type: ApplicationFiled: May 1, 2012Publication date: August 30, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Ryuta HASEGAWA, Hiroshi Mochikawa, Masami Hirata, Yukihiko Hatano
-
Patent number: 7969227Abstract: According to one embodiment, a temperature detection circuit is provided which requires only a small number of additional components, thus minimizing an increase in costs and which offers an insulating property and high responsiveness. A temperature detection circuit outputs a first PWM signal corresponding to a temperature of a first temperature sensor from a photointerrupter as a signal insulated from the first temperature sensor. A temperature detection circuit outputs a second PWM signal corresponding to a temperature of a second temperature sensor from a photointerrupter as a signal insulated from the second temperature sensor. A controlling arithmetic apparatus calculates a higher one of the temperatures detected by the first and second temperature sensors based on the PWM signals output from the photointerrupter.Type: GrantFiled: October 18, 2010Date of Patent: June 28, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Ryuta Hasegawa, Ryuichi Morikawa, Nobumitsu Tada, Masami Hirata
-
Publication number: 20110032001Abstract: According to one embodiment, a temperature detection circuit is provided which requires only a small number of additional components, thus minimizing an increase in costs and which offers an insulating property and high responsiveness. A temperature detection circuit outputs a first PWM signal corresponding to a temperature of a first temperature sensor from a photointerrupter as a signal insulated from the first temperature sensor. A temperature detection circuit outputs a second PWM signal corresponding to a temperature of a second temperature sensor from a photointerrupter as a signal insulated from the second temperature sensor. A controlling arithmetic apparatus calculates a higher one of the temperatures detected by the first and second temperature sensors based on the PWM signals output from the photointerrupter.Type: ApplicationFiled: October 18, 2010Publication date: February 10, 2011Inventors: Ryuta HASEGAWA, Ryuichi Morikawa, Nobumitsu Tada, Masami Hirata
-
Patent number: 7498145Abstract: The method for measuring the concentration of the measuring object uses a sensor chip comprising an optical waveguide layer and an antibody immobilized layer formed on the surface of the optical waveguide layer, which comprises immobilizing the measuring object and an enzyme-labeled antibody labeled with a labeling enzyme on the antibody immobilized layer of the sensor chip having an immobilized antibody, producing a color-developing and precipitating enzyme reaction product by allowing to react a coloring reagent with the labeling enzyme on the antibody immobilized layer to precipitate the enzyme reaction product on the antibody immobilized layer, allowing to totally reflect a light impinged on the sensor chip from the outside at an interface between the optical waveguide layer and the antibody immobilized layer, and observing to a physical value of the totally reflected light.Type: GrantFiled: February 28, 2006Date of Patent: March 3, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Kenichi Uchiyama, Kayoko Oomiya, Isao Kishimoto, Masami Hirata, Hideo Eto, Ichiro Tono, Ikuo Uematsu, Shingo Kasai, Tomohiro Takase, Tsutomu Honjoh, Masanori Sugitani
-
Patent number: 7410614Abstract: An optical waveguide type iontophoresis sensor chip has a substrate having a first hinged plate and a second hinged plate, an optical waveguide plate connected to the first hinged plate and positioned over a first opening delineated in the first hinged plate, and a gel layer fixed on the second hinged plate and covering a second opening delineated in the second hinged plate and configured to contact with the optical waveguide plate through the first opening in case that the substrate is folded.Type: GrantFiled: July 26, 2004Date of Patent: August 12, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Kenichi Uchiyama, Ikuo Uematsu, Kayoko Oomiya, Ichiro Tono, Hideo Eto, Isao Kishimoto, Naotada Okada, Masami Hirata
-
Publication number: 20060194345Abstract: The method for measuring the concentration of the measuring object uses a sensor chip comprising an optical waveguide layer and an antibody immobilized layer formed on the surface of the optical waveguide layer, which comprises immobilizing the measuring object and an enzyme-labeled antibody labeled with a labeling enzyme on the antibody immobilized layer of the sensor chip having an immobilized antibody, producing a color-developing and precipitating enzyme reaction product by allowing to react a coloring reagent with the labeling enzyme on the antibody immobilized layer to precipitate the enzyme reaction product on the antibody immobilized layer, allowing to totally reflect a light impinged on the sensor chip from the outside at an interface between the optical waveguide layer and the antibody immobilized layer, and observing to a physical value of the totally reflected light.Type: ApplicationFiled: February 28, 2006Publication date: August 31, 2006Applicant: Kabushiki Kaisha ToshibaInventors: Kenichi Uchiyama, Kayoko Oomiya, Isao Kishimoto, Masami Hirata, Hideo Eto, Ichiro Tono, Ikuo Uematsu, Shingo Kasai, Tomohiro Takase, Tsutomu Honjoh, Masanori Sugitani
-
Publication number: 20060063984Abstract: An optical waveguide type iontophoresis sensor chip has a substrate having a first hinged plate and a second hinged plate, an optical waveguide plate connected to the first hinged plate and positioned over a first opening delineated in the first hinged plate, and a gel layer fixed on the second hinged plate and covering a second opening delineated in the second hinged plate and configured to contact with the optical waveguide plate through the first opening in case that the substrate is folded.Type: ApplicationFiled: July 26, 2004Publication date: March 23, 2006Inventors: Kenichi Uchiyama, Ikuo Uematsu, Kayoko Oomiya, Ichiro Tono, Hideo Eto, Isao Kishimoto, Naotada Okada, Masami Hirata
-
Patent number: 6989070Abstract: To weld a filter made of a laser beam-transmittable fiber material to a case made of a laser beam-nontransmittable resin material by a laser beam the filter is first placed on the case; subsequently, the filter is pressurized by a jig to increase the fiber density of a welding portion; and then the welding portion is irradiated by the laser beam. In the step of increasing the fiber density, a periphery of the welding portion is pressurized by the jig to increase the fiber density of the filter in a larger area than the welding portion. Accordingly, the laser beam transmitting through the filter melts a part of the case, and the melted resin material permeates through gaps between the fibers constituting the filter, thereby welding the welding portion to the case.Type: GrantFiled: April 11, 2003Date of Patent: January 24, 2006Assignees: Aisan Kogyo Kabushiki Kaisha, Toyota Jidosha Kabushiki KaishaInventors: Tomohiro Sakai, Masami Hirata, Kanehiro Fukaya, Hideo Nakamura
-
Publication number: 20050084909Abstract: An antigen measuring device has an antibody chip. The antibody chip has a substrate. A pair of gratings are formed on the substrate. An antibody-fixed layer surrounded by a wall is formed between the gratings. A light emitting element emits a light beam toward the first grating. A light receiving element receives the light beam which propagates through the substrate under the antibody-fixed layer and is outputfrom the second grating.Type: ApplicationFiled: August 30, 2004Publication date: April 21, 2005Inventors: Kenichi Uchiyama, Kayoko Oomiya, Isao Kishimoto, Masami Hirata, Hideo Eto, Ichiro Tono, Ikuo Uematsu
-
Patent number: 6749137Abstract: An electromagnetic fuel injection valve wherein a central pipe part has satisfactory mechanical strength and an intermediate portion of the pipe part is surely made non-magnetic is provided. The electromagnetic fuel injection valve has a core surrounded by a solenoid coil. A valve housing is disposed forward of the core. The core and the valve housing are connected through a thin-walled portion. The wall thickness of the thin-walled portion is smaller than the wall thickness of the core and that of the valve housing. The core and the thin-walled portion, together with the valve housing, are formed in an integral structure. The thin-walled portion has a sufficient wall thickness to provide satisfactory mechanical strength. The thin-walled portion is modified into a high-hardness non-magnetic portion by a carbulizing treatment.Type: GrantFiled: March 19, 2003Date of Patent: June 15, 2004Assignee: Aisan Kogyo Kabushiki KaishaInventors: Yukinori Kato, Motoyuki Suzuki, Hikaru Kikuta, Tomohiro Okubo, Masami Hirata
-
Patent number: 6642679Abstract: In a car body provided with a battery with a low output voltage of 12 V, a step-up circuit unit is connected between the battery and an electromechanical energy converting section. In a car provided with a battery with a high output voltage of 36 V, the battery is connected directly to the electromechanical energy converting section.Type: GrantFiled: July 19, 2001Date of Patent: November 4, 2003Assignee: Kabushiki Kaisha ToshibaInventors: Kazuo Nagatake, Tsuyoshi Shinohara, Isao Kishimoto, Masami Hirata
-
Publication number: 20030196750Abstract: To weld a filter made of a laser beam-transmittable fiber material to a case 2 made of a laser beam-nontransmittable resin material by a laser beam LB, the filter 4 is first placed on the case 2; subsequently, the filter 4 is pressurized by a jig 19 to increase the fiber density of a welding portion B2; and then the welding portion B2 is irradiated by the laser beam LB. In the step of increasing the fiber density, a periphery of the welding portion B2 is pressurized by the jig 19 to increase the fiber density of the filter 4 in a larger area than the welding portion B2. Accordingly, the laser beam LB transmitting through the filter 4 melts a part of the case 2, and the melted resin material permeates through gaps between the fibers constituting the filter 4, thereby welding the welding portion to the case 2.Type: ApplicationFiled: April 11, 2003Publication date: October 23, 2003Applicants: Aisan Kogyo Kabushiki Kaisha, Toyota Jidosha Kabushiki KaishaInventors: Tomohiro Sakai, Masami Hirata, Kanehiro Fukaya, Hideo Nakamura
-
Publication number: 20030178510Abstract: An electromagnetic fuel injection valve wherein a central pipe part has satisfactory mechanical strength and an intermediate portion of the pipe part is surely made non-magnetic is provided. The electromagnetic fuel injection valve has a core surrounded by a solenoid coil. A valve housing is disposed forward of the core. The core and the valve housing are connected through a thin-walled portion. The wall thickness of the thin-walled portion is smaller than the wall thickness of the core and that of the valve housing. The core and the thin-walled portion, together with the valve housing, are formed in an integral structure. The thin-walled portion has a sufficient wall thickness to provide satisfactory mechanical strength. The thin-walled portion is modified into a high-hardness non-magnetic portion by a carbulizing treatment.Type: ApplicationFiled: March 19, 2003Publication date: September 25, 2003Inventors: Yukinori Kato, Motoyuki Suzuki, Hikaru Kikuta, Tomohiro Okubo, Masami Hirata
-
Patent number: 6590360Abstract: A control device for a permanent magnet motor serving as both a starter for an engine and a generator in a motor vehicle is disclosed.Type: GrantFiled: March 29, 2001Date of Patent: July 8, 2003Assignee: Kabushiki Kaisha ToshibaInventors: Masami Hirata, Tsuyoshi Shinohara, Kyouichi Okada, Isao Kishimoto, Kazuo Nagatake
-
Patent number: 6378792Abstract: A fuel injection nozzle is provided with a valve seat having a valve opening in which a valve is slidably provided, and a seat portion on which the valve is seated, and a nozzle tip having a sack portion and an injection opening 36a formed on the sack portion. The valve seat is formed of metal, and at the same time, the nozzle tip is molded by metal injection molding, wherein the valve seat and nozzle tip are joined by welding, or after the injection opening of the nozzle tip is formed from the upstream side in the fuel injection direction by laser machining, the valve seat and nozzle tip are joined by welding.Type: GrantFiled: April 5, 1999Date of Patent: April 30, 2002Assignee: Aisan Kogyo Kabushiki KaishaInventors: Kanehiro Fukaya, Masami Hirata, Norio Tsuzuki, Hiroshi Oda, Tsuneaki Aoki
-
Publication number: 20020014868Abstract: In a car body provided with a battery with a low output voltage of 12 V, a step-up circuit unit is connected between the battery and an electromechanical energy converting section. In a car provided with a battery with a high output voltage of 36 V, the battery is connected directly to the electromechanical energy converting section.Type: ApplicationFiled: July 19, 2001Publication date: February 7, 2002Inventors: Kazuo Nagatake, Tsuyoshi Shinohara, Isao Kishimoto, Masami Hirata
-
Publication number: 20020008166Abstract: A fuel injection nozzle is provided with a valve seat having a valve opening in which a valve is slidably provided, and a seat portion on which the valve is seated, and a nozzle tip having a sack portion and an injection opening 36a formed on the sack portion. The valve seat is formed of metal, and at the same time, the nozzle tip is molded by metal injection molding, wherein the valve seat and nozzle tip are joined by welding, or after the injection opening of the nozzle tip is formed from the upstream side in the fuel injection direction by laser machining, the valve seat and nozzle tip are joined by welding.Type: ApplicationFiled: April 5, 1999Publication date: January 24, 2002Inventors: KANEHIRO FUKAYA, MASAMI HIRATA, NORIO TSUZUKI, HIROSHI ODA, TSUNEAKI AOKI