Patents by Inventor Katsuhiko Hirano
Katsuhiko Hirano 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: 11959197Abstract: A first aspect of the present invention is carbon fiber wherein the surface of a monofilament has a center line average roughness Ra of 6.0 nm or more and 13 nm or less, and the monofilament has a long diameter/short diameter ratio of 1.11 or more and 1.245 or less. A second aspect of the present invention is carbon fiber precursor acrylic fiber wherein the surface of a monofilament has a center line average roughness Ra of 18 nm or more and 27 nm or less, and the monofilament has a long diameter/short diameter ratio of 1.11 or more and 1.245 or less. The carbon fiber according to the first aspect is obtained by stabilizing and carbonizing under specific conditions the carbon fiber precursor acrylic fiber according to the second aspect.Type: GrantFiled: August 15, 2019Date of Patent: April 16, 2024Assignee: Mitsubishi Chemical CorporationInventors: Naomasa Matsuyama, Yuutarou Nakamura, Norifumi Hirota, Hiroko Matsumura, Katsuhiko Ikeda, Kouki Wakabayashi, Tadashi Ootani, Akihiro Itou, Kenji Hirano, Akito Hatayama, Kenji Kaneta, Atsushi Nakajima
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Patent number: 9334031Abstract: A system for attitude control of an underwater vehicle 20 of the present invention includes an underwater vehicle 20 with a thruster 65, an assist device 10 that is coupled to the underwater vehicle 20 with a cable 1 and has cable handling equipment 2 and a thruster 58, a cable attachment-to-attachment distance detection unit 50 that detects distance between a cable attachment of the underwater vehicle 20 and a cable dispenser of the assist device 10, and a control unit 32 that previously stores the relationship between the attachment-to-attachment distance and cable length including a predetermined amount of slack and determines the amount of cable to be wound up or let out based on the cable length associated with the detected attachment-to-attachment distance.Type: GrantFiled: June 26, 2014Date of Patent: May 10, 2016Assignee: Hitachi-GE Nuclear Energy, Ltd.Inventors: Hayato Mori, Ryosuke Kobayashi, Satoshi Okada, Naoyuki Kono, Katsuhiko Hirano, Yosuke Takatori, Masahiro Tooma
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Publication number: 20150090175Abstract: A system for attitude control of an underwater vehicle 20 of the present invention includes an underwater vehicle 20 with a thruster 65, an assist device 10 that is coupled to the underwater vehicle 20 with a cable 1 and has cable handling equipment 2 and a thruster 58, a cable attachment-to-attachment distance detection unit 50 that detects distance between a cable attachment of the underwater vehicle 20 and a cable dispenser of the assist device 10, and a control unit 32 that previously stores the relationship between the attachment-to-attachment distance and cable length including a predetermined amount of slack and determines the amount of cable to be wound up or let out based on the cable length associated with the detected attachment-to-attachment distance.Type: ApplicationFiled: June 26, 2014Publication date: April 2, 2015Inventors: Hayato MORI, Ryosuke KOBAYASHI, Satoshi OKADA, Naoyuki KONO, Katsuhiko HIRANO, Yosuke TAKATORI, Masahiro TOOMA
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Patent number: 6742501Abstract: An inertia-related engine speed fluctuation is computed when the engine is rotated without ignition. A load-related engine speed fluctuation is computed when the engine is rotated with ignition and combustion. The inertia-related engine speed fluctuation is indicative of an inertia moment that is variable in accordance with equipments connected with the engine. The load-related engine speed fluctuation is indicative of an engine load. When estimating the engine load, the inertia-related engine speed fluctuation is considered for removing an influence of the inertia moment on the engine load. The estimated engine load is used for controlling the engine. It is possible to consider the inertia moment into an engine control.Type: GrantFiled: June 18, 2002Date of Patent: June 1, 2004Assignee: Denso CorporationInventor: Katsuhiko Hirano
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Patent number: 6639962Abstract: A preventive maintenance method and apparatus for a structural member in a reactor pressure vessel according to the present invention reduce a tensile residual stress on a surface of the structural member by impinging a water jet from a nozzle onto a plane surface of a deflector to thereby change direction of flow of the water jet, and impinging the water jet after being deflected onto the surface of the structural member. This method and apparatus are applicable to a narrow space portion, and can improve a residual stress on the surface of the structural member and can also prevent damage such as stress corrosion cracking.Type: GrantFiled: January 15, 2002Date of Patent: October 28, 2003Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd., Hitachi Ibaraki Business Engineering Co., Ltd.Inventors: Kunio Enomoto, Katsuhiko Hirano, Eisaku Hayashi, Ren Morinaka, Sadato Shimizu, Satoshi Kanno, Shigeru Tanaka, Tetsuya Ishikawa
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Patent number: 6636579Abstract: An opening portion 3 is produced by cutting a recirculating piping 72 connected to a recirculating nozzle 2 of a reactor pressure vessel 1. A repairing device is brought into an annulus 10 of the reactor pressure vessel 1 from the opening 3, thereby repairing the annulus 10.Type: GrantFiled: September 14, 2001Date of Patent: October 21, 2003Assignees: Hitachi, Ltd., Babcock-Hitachi K.K., Hestec Service Co., Ltd.Inventors: Kouichi Kurosawa, Youichi Mahara, Toshiharu Nagashima, Kazuhiro Nitta, Shinji Go, Yoshitoshi Suzuki, Katsuhiko Hirano
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Patent number: 6612910Abstract: A liquid crystal display device, a liquid crystal display device cutting method, and a liquid crystal display device cutting apparatus that prevents damaging attached flexible conductive lines by providing a rounded water jet cut edge of a glass liquid crystal panel. The liquid crystal display device cutting apparatus includes a pump for increasing the pressure of a liquid, a nozzle with a throat that receives the pressurized liquid, a movable nozzle support that is movable at least in a plane parallel to the liquid crystal display, and a conveyor supporting the liquid crystal display device.Type: GrantFiled: September 11, 2000Date of Patent: September 2, 2003Assignee: Hitachi, Ltd.Inventors: Katsuhiko Hirano, Makoto Hayashi, Kunio Enomoto, Makoto Kitano, Satoshi Kanno
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Publication number: 20030128794Abstract: An opening portion 3 is produced by cutting a recirculating piping 72 connected to a recirculating nozzle 2 of a reactor pressure vessel 1. A repairing device is brought into an annulus 10 of the reactor pressure vessel 1 from the opening 3, thereby repairing the annulus 10.Type: ApplicationFiled: September 30, 2002Publication date: July 10, 2003Applicant: HITACHI, LTD., BABCOCK-HITACHI K.K.Inventors: Kouichi Kurosawa, Youichi Mahara, Toshiharu Nagashima, Kazuhiro Nitta, Shinji Go, Yoshitoshi Suzuki, Katsuhiko Hirano
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Patent number: 6519991Abstract: A water jet peening apparatus which can carry out an efficient peening work on a large-diameter cylindrical structure by injecting a jet stream which contains air bubbles caused by cavitation at a low angle of incidence is provided. The apparatus is comprised of a nozzle which introduces a high pressure water and injects a water jet stream containing air bubbles caused by cavitation at the cylindrical structure disposed in water, wherein the angle of injection of the jet stream is smaller than 45 degrees relative to a tangent of the cylindrical structure.Type: GrantFiled: April 24, 2002Date of Patent: February 18, 2003Assignees: Hitachi, Ltd., Hitachi Kiso Co., Ltd., Hitachi Ibaraki Business Engineering Co., Ltd., Hitachi Engineering Co., Ltd.Inventors: Katsuhiko Hirano, Kunio Enomoto, Eisaku Hayashi, Sadato Shimizu, Ren Morinaka, Tetsuya Ishikawa, Shigeru Tanaka, Noboru Chiba
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Publication number: 20020189587Abstract: An inertia-related engine speed fluctuation is computed when the engine is rotated without ignition. A load-related engine speed fluctuation is computed when the engine is rotated with ignition and combustion. The inertia-related engine speed fluctuation is indicative of an inertia moment that is variable in accordance with equipments connected with the engine. The load-related engine speed fluctuation is indicative of an engine load. When estimating the engine load, the inertia-related engine speed fluctuation is considered for removing an influence of the inertia moment on the engine load. The estimated engine load is used for controlling the engine. It is possible to consider the inertia moment into an engine control.Type: ApplicationFiled: June 18, 2002Publication date: December 19, 2002Inventor: Katsuhiko Hirano
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Publication number: 20020159558Abstract: A preventive maintenance method and apparatus for a structural member in a reactor pressure vessel according to the present invention reduce a tensile residual stress on a surface of the structural member by impinging a water jet from a nozzle onto a plane surface of a deflector to thereby change direction of flow of the water jet, and impinging the water jet after being deflected onto the surface of the structural member. This method and apparatus are applicable to a narrow space portion, and can improve a residual stress on the surface of the structural member and can also prevent damage such as stress corrosion cracking.Type: ApplicationFiled: January 15, 2002Publication date: October 31, 2002Inventors: Kunio Enomoto, Katsuhiko Hirano, Eisaku Hayashi, Ren Morinaka, Sadato Shimizu, Satoshi Kanno, Shigeru Tanaka, Tetsuya Ishikawa
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Publication number: 20020116970Abstract: A water jet peening apparatus which can carry out an efficient peening work on a large-diameter cylindrical structure by injecting a jet stream which contains air bubbles caused by cavitation at a low angle of incidence is provided. The apparatus is comprised of a nozzle which introduces a high pressure water and injects a water jet stream containing air bubbles caused by cavitation at the cylindrical structure disposed in water, wherein the angle of injection of the jet stream is smaller than 45 degrees relative to a tangent of the cylindrical structure.Type: ApplicationFiled: April 24, 2002Publication date: August 29, 2002Applicant: Hitachi, Ltd.Inventors: Katsuhiko Hirano, Kunio Enomoto, Eisaku Hayashi, Sadato Shimizu, Ren Morinaka, Tetsuya Ishikawa, Shigeru Tanaka, Noboru Chiba
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Patent number: 6425276Abstract: A water jet peening apparatus which can carry out an efficient peening work on a large-diameter cylindrical structure by injecting a jet stream which contains air bubbles caused by cavitation at a low angle of incidence is provided. The apparatus is comprised of a nozzle which introduces a high pressure water and injects a water jet stream containing air bubbles caused by cavitation at the cylindrical structure disposed in water, wherein the angle of injection of the jet stream is smaller than 45 degrees relative to a tangent of the cylindrical structure.Type: GrantFiled: January 21, 2000Date of Patent: July 30, 2002Assignees: Hitachi, Ltd., Hitachi Kiso Co., Ltd., Hitachi Ibaraki Business Engineering Co., Ltd., Hitachi Engineering Co., Ltd.Inventors: Katsuhiko Hirano, Kunio Enomoto, Eisaku Hayashi, Sadato Shimizu, Ren Morinaka, Tetsuya Ishikawa, Shigeru Tanaka, Noboru Chiba
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Publication number: 20020064250Abstract: An opening portion 3 is produced by cutting a recirculating piping 72 connected to a recirculating nozzle 2 of a reactor pressure vessel 1. A repairing device is brought into an annulus 10 of the reactor pressure vessel 1 from the opening 3, thereby repairing the annulus 10.Type: ApplicationFiled: September 14, 2001Publication date: May 30, 2002Inventors: Kouichi Kurosawa, Youichi Mahara, Toshiharu Nagashima, Kazuhiro Nitta, Shinji Go, Yoshitoshi Suzuki, Katsuhiko Hirano
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Patent number: 6345083Abstract: A preventive maintenance method and apparatus for a structural member in a reactor pressure vessel according to the present invention reduce a tensile residual stress on a surface of the structural member by impinging a water jet from a nozzle onto a plane surface of a deflector to thereby change direction of flow of the water jet, and impinging the water jet after being deflected onto the surface of the structural member. This method and apparatus are applicable to a narrow space portion, and can improve a residual stress on the surface of the structural member and can also prevent damage such as stress corrosion cracking.Type: GrantFiled: August 12, 1999Date of Patent: February 5, 2002Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd., Hitachi Ibaraki Business Engineering Co., Ltd.Inventors: Kunio Enomoto, Katsuhiko Hirano, Eisaku Hayashi, Ren Morinaka, Sadato Shimizu, Satoshi Kanno, Shigeru Tanaka, Tetsuya Ishikawa
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Patent number: 6341151Abstract: A preventive maintenance method and apparatus for a structural member in a reactor pressure vessel according to the present invention reduce a tensile residual stress on a surface of the structural member by impinging a water jet from a nozzle onto a plane surface of a deflector to thereby change direction of flow of the water jet, and impinging the water jet after being deflected onto the surface of the structural member. This method and apparatus are applicable to a narrow space portion, and can improve a residual stress on the surface of the structural member and can also prevent damage such as stress corrosion cracking.Type: GrantFiled: August 29, 2000Date of Patent: January 22, 2002Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd., Hitachi Ibaraki Business Engineering Co., Ltd.Inventors: Kunio Enomoto, Katsuhiko Hirano, Eisaku Hayashi, Ren Morinaka, Sadato Shimizu, Satoshi Kanno, Shigeru Tanaka, Tetsuya Ishikawa
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Patent number: 5897062Abstract: A fluid jet nozzle has a water chamber accommodating therein pressurized fluid, an orifice communicating with the water chamber and contracting the fluid from the water chamber, a throat communicating with the orifice and through which the fluid from the orifice passes, a multiplication chamber communicating with the throat and receiving the fluid from the throat for multiplying cavitation, and a diffusion chamber receiving the fluid from the multiplication chamber for diffusing the fluid.Type: GrantFiled: October 18, 1996Date of Patent: April 27, 1999Assignees: Hitachi, Ltd., Babcock-Hitachi Kabushiki KaisyaInventors: Kunio Enomoto, Katsuhiko Hirano, Masahiro Otaka, Kazuo Amano, Eisaku Hayashi, Sadato Shimizu, Ren Morinaka, Kazunori Sato
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Patent number: 5722372Abstract: A single cylinder engine is equipped with a carburetor having an electrically controlled air bleed control valve. A microcomputer of an electronic controller calculates a target opening timing and a target opening time period of the air bleed control valve. The microcomputer, receiving a rotation pulse from a rotation sensor indicative of an engine rotational position, opens the air bleed control valve at the calculated target opening timing and for the calculated target opening period so that the air bleed control valve controls an amount of air-bleeding which in turn controls an air-fuel ratio of mixture supplied to the engine.Type: GrantFiled: September 30, 1996Date of Patent: March 3, 1998Assignee: Nippondenso Co., Ltd.Inventors: Katsuharu Hosoe, Katsuhiko Hirano
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Patent number: 4957032Abstract: The key scaling apparatus for an electronic musical instrument having a keyboard includes a memory unit having plural memory areas associated respectively with plural notes or note groups represented by plural keys or key groups of the keyboard; manipulator knobs for producing desired musical tone preparing instruction signals determining the characteristics of the musical tone to be produced; registering means for writing, in those memory areas corresponding to a desired note or note group designated by an operated key, the instruction signals produced by the manipulated knobs; and control means for controlling, when a performance mode is designated, the musical tone to be produced bearing the characteristics as designated by the instruction signals read out from the related memory areas upon operation of a key.Type: GrantFiled: November 24, 1987Date of Patent: September 18, 1990Assignee: Yamaha CorporationInventors: Katsuhiko Hirano, Masahiko Koike, Hiroyuki Toda
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Patent number: 4947724Abstract: An electronic musical instrument with plural pitch data generating functions includes a keyboard, a plurality of tone generating units, a pitch designating unit, a plural pitch data generating unit, and a musical tone generating unit. The keyboard has a plurality of keys. The tone generating units generate at least two tone signals in response to operation of a key among the plural keys. The pitch designating unit designates a pitch of a musical tone to be produced. The plural pitch data generating unit generates at least two pitch data based on the pitch and in accordance with different scale characteristics. The musical tone generating unit generates at least two musical tone signals based on at least two pitch data respectively, so that at least two musical tone signals have the different scale characteristics.Type: GrantFiled: October 5, 1989Date of Patent: August 14, 1990Assignee: Yamaha CorporationInventors: Katsuhiko Hirano, Masahiko Koike, Hiroyuki Toda