Patents by Inventor Hiroki Takeda
Hiroki Takeda 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: 20160252269Abstract: A heat exchange element has a liner sheet high in water vapor transmission properties and gas shielding properties, specifically, and is prepared by combining a piece of single-faced corrugated cardboard 1 constituted of a liner sheet 1 with a carbon dioxide shielding rate of greater than or equal to 95% and a corrugated sheet 1 and a piece of single-faced corrugated cardboard 2 constituted of a liner sheet 2 with a water vapor permeability of greater than or equal to 80 g/m2·hr and a corrugated sheet 2, and a heat exchanger.Type: ApplicationFiled: September 30, 2014Publication date: September 1, 2016Inventors: Hiroki Takeda, Tomomichi Fujiyama, Taira Omori, Katsuya Sode
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Publication number: 20160237620Abstract: A base paper for heat exchangers having a stacked structure including at least one layer of a first layer composed mainly of a fibrous substance with a Canadian standard freeness specified in JIS P8121 (1995) of less than 150 ml and at least one layer of a second layer composed mainly of a fibrous substance with a Canadian standard freeness specified in JIS P8121 (1995) of greater than or equal to 150 ml, and a total heat exchange element prepared by stacking pieces of corrugated cardboard in which the base paper for heat exchange is used as a part thereof.Type: ApplicationFiled: September 30, 2014Publication date: August 18, 2016Applicant: Toray Industries, Inc.Inventors: Hiroki Takeda, Tomomichi Fujiyama, Taira Omori, Katsuya Sode
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Publication number: 20160028342Abstract: An electric motor drive device which drives an electric motor includes switching elements which are respectively connected to output lines and correspond to upper and lower arms of respective phases, a control unit which controls the operations of the switching elements, a smoothing capacitor connected in parallel with series circuits of the upper and lower arms of the phases, and an abnormality detection unit. The abnormality detection unit detects a voltage value of a virtual neutral point as a value related to the state of insulation of each of the output lines and detects a ground fault of the output line, based on a tilt of a temporary change in the detected value.Type: ApplicationFiled: April 21, 2015Publication date: January 28, 2016Applicant: Hitachi Automotive Systems, Ltd.Inventors: Kimihisa FURUKAWA, Toshiyuki AJIMA, Tohma YAMAGUCHI, Hiroki TAKEDA, Nobuhiko OKABE
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Publication number: 20150303844Abstract: An inverter device includes a source current calculator and an inverter circuit, wherein: the source current calculator calculates an average value of the DC bus current Ical during a PWM cycle through arithmetic operation executed based upon instantaneous values of the DC bus current Idc of the inverter circuit; and the source current calculator provides an estimated value by designating the average current value Ical during the PWM cycle as an input source current Isrc during the PWM cycle.Type: ApplicationFiled: April 16, 2015Publication date: October 22, 2015Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Toshiyuki AJIMA, Kimihisa FURUKAWA, Tohma YAMAGUCHI, Hiroki TAKEDA
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Publication number: 20150027131Abstract: An axial compressor includes: a rotor as a rotational shaft; a plurality of rotor blades mounted on the rotor; a compressor casing that covers the rotor and the rotor blades; a plurality of stator vanes mounted on the compressor casing. The rotor blades and the stator vanes are each disposed in a circumferential direction of the rotational shaft to form a rotor-blade cascade and a stator-vane cascade, respectively. The rotor-blade cascade and the stator-vane cascade are arranged in plural rows, respectively, in an axial direction of the rotational shaft. The stator vane has a dovetail as a base for supporting a vane section. The compressor casing has a dovetail groove formed therein. The dovetail groove extends in the circumferential direction of the rotational shaft to receive the dovetail inserted therein to fix the stator vanes. Two or more stator vanes, the stator vanes belonging to stator-vane cascades different from each other, are fixed in the dovetail groove.Type: ApplicationFiled: July 28, 2014Publication date: January 29, 2015Inventors: Hiroki TAKEDA, Yasuo TAKAHASHI, Chihiro MYOREN
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Publication number: 20140356647Abstract: The aluminum alloy clad material for forming of the present disclosure includes: an aluminum alloy core material containing Mg: 0.2 to 1.5% (mass %, the same hereinafter), Si: 0.2 to 2.5%, Cu: 0.2 to 3.0%, and the remainder being Al and inevitable impurities; an aluminum alloy surface material which is cladded on one side or both sides the core material, the thickness of the clad for one side being 3 to 30% of the total sheet thickness, and which has a composition including Mg: 0.2 to 1.5%, Si: 0.2 to 2.0%, Cu being restricted to 0.1% or smaller, and the remainder being Al and inevitable impurities; and an aluminum alloy insert material which is interposed between the core material and the surface material, and has a solidus temperature of 590° C. or lower.Type: ApplicationFiled: October 31, 2012Publication date: December 4, 2014Applicant: UACJ CORPORATIONInventors: Hiroki Takeda, Akira Hibino
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Publication number: 20140325990Abstract: A gas turbine having a compressor for compressing air, a combustor for taking in compressed air discharged from the compressor, mixing it with fuel, and burning them, and a turbine driven by combustion gas generated in the combustor, comprising: inlet guide vanes installed at a stage near an inlet of the compressor for adjusting a compressor flow rate by changing an attaching angle thereof, a steam injection mechanism for injecting steam to the combustor, a steam adjustment valve for adjusting the steam injection rate, and a steam rate control mechanism for adjusting an opening of the steam adjustment valve, a steam monitoring mechanism for monitoring the steam rate injected to the combustor, an air temperature monitoring mechanism for monitoring an atmospheric temperature, and a control unit for determining whether a restriction value of the steam injection rate using a temperature, an opening of the inlet guide vanes, and the steam injection rate as indexes is satisfied, and controlling at least one of a teType: ApplicationFiled: November 4, 2013Publication date: November 6, 2014Applicant: Hitachi, Ltd.Inventors: Hiroki TAKEDA, Ryo AKIYAMA, Yasuo TAKAHASHI
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Publication number: 20140322558Abstract: An aluminum alloy clad material for forming includes: an aluminum alloy core material containing Mg: 3.0 to 10% (mass %, the same hereinafter), and the remainder being Al and inevitable impurities; an aluminum alloy surface material which is cladded on one side or both sides of the core material, the thickness of the clad for one side being 3 to 30% of the total sheet thickness, and which has a composition including Mg: 0.4 to 5.0%, and the remainder being Al and inevitable impurities; and an aluminum alloy insert material which is interposed between the core material and the surface material, and has a solidus temperature of 580° C. or lower.Type: ApplicationFiled: October 31, 2012Publication date: October 30, 2014Inventors: Hiroki Takeda, Akira Hibino
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Publication number: 20140300024Abstract: Provided is a nonwoven fabric for press molding and a molded product. With use of the nonwoven fabric, a fiberboard can be molded in a shorter time and even by 3D press molding a molded product with an excellent appearance quality can be obtained. The nonwoven fabric for press molding is formed of polylactic acid fibers and natural fibers, the polylactic acid fibers having a crystallization temperature on cooling of 120° C. or higher, the nonwoven fabric having a tensile strength of 20 N/cm2 or higher, and the nonwoven fabric having a tensile stress of 80 N/cm2 or less at 30% tensile elongation in a 200° C. atmosphere. The molded product is obtainable with use of the nonwoven fabric.Type: ApplicationFiled: November 7, 2012Publication date: October 9, 2014Inventors: Hiroki Takeda, Tomomichi Fujiyama, Hiroshi Kajiyama
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Patent number: 8818672Abstract: A controller sets a target hydraulic pressure of a master cylinder based on the operation amount of a brake pedal, and controls the action of an electric motor so that a master cylinder hydraulic pressure attains the target hydraulic pressure. A brake characteristic representing a relationship between a motor rotation position detected by a resolver and the master cylinder hydraulic pressure as detected by the hydraulic pressure sensor is stored and updated. When the hydraulic pressure sensor is abnormal, a target motor rotation position corresponding to the target hydraulic pressure is set using the updated brake characteristic, and the action of the electric motor is controlled. The electric motor is controlled based on the updated brake characteristic, and hence fluctuations in the vehicle deceleration with respect to the brake operation can be suppressed and a sense of discomfort for the driver can be alleviated.Type: GrantFiled: February 28, 2012Date of Patent: August 26, 2014Assignee: Hitachi Automotive Systems, Ltd.Inventors: Hiroki Takeda, Tohma Yamaguchi
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Patent number: 8676409Abstract: Even when a rigidity table stored in a RAM at the time of a start of a brake operation does not coincide with an actual rigidity characteristic of an electric caliper which changes according to brake conditions including how often and how long a brake operation is applied, it is possible to reduce a deviation between a pressing force instruction value and a generated pressing force by updating the characteristic of the relation between a pressing force instruction value and rotational position each time an estimated thrust force value is calculated during one brake operation. It is possible to steadily keep followability to a pressing force instruction according to an actual state of the rigidity characteristic of the electric caliper, thereby ensuring generation of an appropriate brake force.Type: GrantFiled: March 23, 2011Date of Patent: March 18, 2014Assignee: Hitachi Automotive Systems, Ltd.Inventors: Hiroki Takeda, Hirotaka Oikawa, Junichi Ikeda, Daisuke Goto
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Patent number: 8640839Abstract: A control device for a vehicular power transmitting system including a torque converter (6) having a pump impeller (6p), a turbine wheel (6t), a stator wheel (6s) rotatably disposed between the turbine wheel and the pump impeller, and a lock-up clutch (L/U) includes a capacity coefficient control unit (126) that controls a capacity coefficient of the torque converter by controlling rotation of the stator wheel, and the capacity coefficient control unit increases the capacity coefficient of the torque converter based on an amount of heat generated during slip control of the lock-up clutch.Type: GrantFiled: November 12, 2009Date of Patent: February 4, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tsuyoshi Fujikane, Kazuyuki Shiiba, Hiromitsu Metsugi, Hiroki Takeda
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Publication number: 20130197771Abstract: In a brake control apparatus for generating a brake hydraulic pressure using an electric motor, in order to restrain changes in vehicle deceleration with respect to an operation amount of a brake pedal when a hydraulic pressure sensor is abnormal, a controller (6) sets a target hydraulic pressure of a master cylinder (2) based on the operation amount of a brake pedal (11) detected by a stroke sensor (36), and controls an action of an electric motor (14) so that a master cylinder hydraulic pressure detected by a hydraulic pressure sensor (10) attains the target hydraulic pressure. On this occasion, a brake characteristic representing a relationship between a motor rotation position detected by a resolver (37) and the master cylinder hydraulic pressure as detected by the hydraulic pressure sensor (10) is stored and updated.Type: ApplicationFiled: February 28, 2012Publication date: August 1, 2013Inventors: Hiroki Takeda, Tohma Yamaguchi
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Patent number: 8239100Abstract: An electric braking apparatus which first moves a piston in a detaching direction or passes a current to move the piston in the detaching direction in order to detect a pad contacting position. Furthermore, while the piston moves in the detaching direction, pad non-contact judgment is performed. After a pad non-contact state is confirmed, the piston is moved in a pressing direction to detect the pad contacting position. When the piston does not move in the detaching direction, it is judged that a parking brake has an ON-state, and it is waited until a host system instructs parking brake release.Type: GrantFiled: August 8, 2007Date of Patent: August 7, 2012Assignee: Hitachi, Ltd.Inventors: Kentarou Ueno, Mitsuhide Sasaki, Hirotaka Oikawa, Tohma Yamaguchi, Hiroki Takeda
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Publication number: 20110240428Abstract: A control device for a vehicular power transmitting system including a torque converter (6) having a pump impeller (6p), a turbine wheel (6t), a stator wheel (6s) rotatably disposed between the turbine wheel and the pump impeller, and a lock-up clutch (L/U) includes a capacity coefficient control unit (126) that controls a capacity coefficient of the torque converter by controlling rotation of the stator wheel, and the capacity coefficient control unit increases the capacity coefficient of the torque converter based on an amount of heat generated during slip control of the lock-up clutch.Type: ApplicationFiled: November 12, 2009Publication date: October 6, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tsuyoshi Fujikane, Kazuyuki Shiiba, Hiromitsu Metsugi, Hiroki Takeda
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Publication number: 20110246039Abstract: Even when a rigidity table stored in a RAM at the time of a start of a brake operation does not coincide with a actual rigidity characteristic (pressing force characteristic in relation to positions) of an electric caliper which changes according to brake conditions including how often and how long a brake operation is applied, it is possible to reduce a deviation between a pressing force instruction value and a generated pressing force by updating the characteristic of the relation between a pressing force instruction value and rotational position (rigidity table) each time an estimated thrust force value is calculated during one brake operation. In other words, it is possible to steadily keep followability to a pressing force instruction according to an actual state of the rigidity characteristic of the electric caliper, thereby ensuring generation of an appropriate brake force.Type: ApplicationFiled: March 23, 2011Publication date: October 6, 2011Inventors: Hiroki Takeda, Hirotaka Oikawa, Junichi Ikeda, Daisuke Goto
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Patent number: 7744962Abstract: The present invention provides a thermosetting liquid coating composition for an aluminum wheel comprising (A) a hydroxy- and carboxy-containing acrylic resin having a hydroxyl value of 90 to 150 mg KOH/g and an acid value of 1 to 30 mg KOH/g, the acrylic resin being obtained by copolymerizing a monomer mixture comprising 10 to 50 wt. % of a C6-18 alkyl ester of (meth)acrylic acid, 8 to 40 wt. % of a secondary hydroxy-containing unsaturated monomer, and a carboxy-containing unsaturated monomer; and (B) an amino resin. Also provided a method of coating an aluminum wheel using the composition.Type: GrantFiled: April 23, 2004Date of Patent: June 29, 2010Assignee: Kansai Paint Co., Ltd.Inventors: Atsuya Kato, Toshio Ohkoshi, Hiroki Takeda
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Patent number: 7550176Abstract: The present invention provides a method of forming a coating film on an aluminum substrate, comprising the steps of: (1) coating an aluminum substrate with a thermosetting polyester resin lustrous powder base coating composition (a) containing a lustrous material, and baking the resulting base coat layer; and (2) coating the base coat layer with a thermosetting acrylic resin clear powder coating composition (b), and baking the resulting clear coat layer to obtain a lustrous multilayer coating film.Type: GrantFiled: December 19, 2003Date of Patent: June 23, 2009Assignees: Kansai Paint Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Toshio Ohkoshi, Hiroki Takeda, Yoshinori Kato, Masahiro Nakamura, Masayoshi Harada, Manabu Imose
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Publication number: 20080059023Abstract: An electric braking apparatus which first moves a piston in a detaching direction or passes a current to move the piston in the detaching direction in order to detect a pad contacting position. Furthermore, while the piston moves in the detaching direction, pad non-contact judgment is performed. After a pad non-contact state is confirmed, the piston is moved in a pressing direction to detect the pad contacting position. When the piston does not move in the detaching direction, it is judged that a parking brake has an ON-state, and it is waited until a host system instructs parking brake release.Type: ApplicationFiled: August 8, 2007Publication date: March 6, 2008Applicant: Hitachi, Ltd.Inventors: Kentarou UENO, Mitsuhide Sasaki, Hirotaka Oikawa, Tohma Yamaguchi, Hiroki Takeda
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Publication number: 20060276589Abstract: The present invention provides a thermosetting liquid coating composition for an aluminum wheel comprising (A) a hydroxy- and carboxy-containing acrylic resin having a hydroxyl value of 90 to 150 mg KOH/g and an acid value of 1 to 30 mg KOH/g, the acrylic resin being obtained by copolymerizing a monomer mixture comprising 10 to 50 wt. % of a C6-18 alkyl ester of (meth)acrylic acid, 8 to 40 wt. % of a secondary hydroxy-containing unsaturated monomer, and a carboxy-containing unsaturated monomer; and (B) an amino resin. Also provided a method of coating an aluminum wheel using the composition.Type: ApplicationFiled: April 23, 2004Publication date: December 7, 2006Inventors: Atsuya Kato, Toshio Ohkoshi, Hiroki Takeda