Patents by Inventor Kenichi Hamada
Kenichi Hamada 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: 7994776Abstract: A failure detection apparatus for a resolver outputting a sine signal indicative of sin ? and a cosine signal indicative of cos ? according to a rotational angle ? of a rotator, includes an inspection value calculating section configured to calculate an inspection value based on at least one of the sine signal and the cosine signal; a failure detecting section configured to judge whether the resolver is in a failure state or not on the basis of the inspection value; a counting section configured to gradually increase a count value with a lapse of time when the failure detecting section is determining that the resolver is in the failure state, and configured to gradually decrease the count value with a lapse of time when the failure detecting section is determining that the resolver is not in the failure state; and a failure deciding section configured to finally decide that the resolver has caused the failure on the basis of the count value.Type: GrantFiled: February 11, 2009Date of Patent: August 9, 2011Assignee: Hitachi, Ltd.Inventors: Tamotsu Yamaura, Kenichi Hamada, Yutaka Makino
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Patent number: 7973117Abstract: A continuous production process, for producing an (meth)acrylic ester (co)polymer comprises the step of continuously feeding an organoaluminum compound-containing polymerization initiator solution and an (meth)acrylic ester into a reactor to continuously obtain a living polymer-containing polymer reaction liquid. The {[molar quantity of methacrylic ester or acrylic ester]/([molar quantity of organoaluminum compound]?[molar quantity of polymerization initiator])} fed into the reactor is regulated to be 15 to 80, and the content of the (meth)acrylic ester in the total feed amount of a polymerization initiator solution and an (meth)acrylic ester fed into the reactor is regulated to not more than 5% by mass.Type: GrantFiled: August 11, 2005Date of Patent: July 5, 2011Assignee: Kuraray Co., Ltd.Inventors: Kenichi Hamada, Yoshihiro Morishita, Tatsufumi Watanabe, Kazushige Ishiura
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Patent number: 7960065Abstract: The present invention provides a separator for a fuel cell comprising a resin and a conductive material as constituting components, and sulfonic acid groups imparted to at least one portion at the surface of gas channels by a treatment using a sulfuric acid-containing gas, wherein the resin and the sulfonic acid groups, which are on the surface of the gas channels, are bonded, and a ratio of sulfur atoms in the sulfonic acid groups at the surface of the gas channels as determined by energy-dispersive X-ray spectroscopy is in a range from 0.1 to 4.0 at %, and a method for producing the separator. The separator for a fuel cell of the present invention is excellent in the wettability to water, since sulfonic acid groups are imparted to the resin at the surface of gas channels in the sulfuric acid-containing gas.Type: GrantFiled: June 16, 2006Date of Patent: June 14, 2011Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Kenichi Hamada, Takayuki Kanematsu, Takashi Kawamura, Tetsuya Harada
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Patent number: 7932474Abstract: An illuminated switch comprising a four-way knob and a push knob, wherein the push knob has two legs which slide along a guide surface on an internal pusher member. Tilt activation of the four-way knob results in the push knob also being tilted. When the user has pushed the push knob while the push knob and the four-way knob are in a tilted position, the push knob in conjunction with the four-way knob linearly move backward in the pushed direction, whereby an internal switch and an external switch are operated. The push knob is illuminated by an internal LED by way of a through hole in the internal pusher member.Type: GrantFiled: June 16, 2009Date of Patent: April 26, 2011Assignee: Kabushiki Kaisha Tokai Rika Denki SeisakushoInventors: Kenichi Hamada, Eiichi Hayakawa, Tatsuya Futamura, Fumitaka Hayase
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Patent number: 7858696Abstract: An object of the present invention is to provide a conductive resin composition which does not cause problems with regard to moldability such as occurrence of separation between a resin component and a conductive filler, voids and warp on molding, and is excellent in filling of a resin into a mold, and is also capable of being used for various electrical and electronic materials, including a separator for a fuel cell having excellent properties.Type: GrantFiled: March 5, 2004Date of Patent: December 28, 2010Assignee: DIC CorporationInventors: Takashi Yasumura, Toshiya Kato, Kenichi Hamada, Tetsuya Harada
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Publication number: 20100316922Abstract: In order to assure drive of a drive motor, a boost operation of a boost device is appropriately performed by judging whether a voltage supplied from a fuel cell suffices a voltage required for driving the drive motor, thereby suppressing a switching loss by the boost device. A fuel cell system is a power source for driving a load. The system includes: a drive motor driven by an electric power; a fuel cell which generates electricity by an electrochemical reaction between an oxidizing gas containing oxygen and a fuel gas containing hydrogen and supplies an electric power to the drive motor; a first boost device which can boosts the voltage outputted from the fuel cell and supplies the boosted voltage to the drive motor; and boost control means which controls voltage boost performed by the first boost device according to the relationship between the fuel cell output voltage and the voltage required by the drive motor.Type: ApplicationFiled: December 26, 2008Publication date: December 16, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenichi Hamada, Nobuyuki Kitamura, Kouta Manabe, Hiroyuki Imanishi
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Patent number: 7772319Abstract: To provide a thermoplastic elastomer composition which can tightly adhere to a resin having a polar group without the need of using any adhesive and is excellent in water resistance, rubber properties and moldability, or to provide a composite molded article manufactured from the composition. A thermoplastic elastomer composition comprising: (a) 100 parts by mass of a styrene block copolymer constituted by a [vinyl aromatic polymer block (A1)]-[hydrogenated conjugated diene polymer block (A2)]-[vinyl aromatic polymer block (A1)]; (b) 2 to 1000 parts by mass of an acrylic block copolymer having a methacrylic acid ester polymer block (B3) and an acrylic acid ester polymer block (B1); and (c) 2 to 200 parts by mass of a block copolymer containing a hydrophilic group; and a composite resin molded article manufactured by compositing the thermoplastic elastomer composition with a thermoplastic resin.Type: GrantFiled: August 25, 2006Date of Patent: August 10, 2010Assignee: Kuraray Co., Ltd.Inventors: Shuji Fujihara, Toyoaki Kurihara, Kenichi Hamada
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Patent number: 7718588Abstract: A lubricating oil additive containing at least one acrylic block copolymer having a weight-average molecular weight of 10,000 to 1,000,000 and a molecular weight distribution [ratio of weight-average molecular weight (Mw) to number-average molecular weight (Mn), i.e., Mw/Mn ratio] of 1.5 or below; and lubricating oil compositions containing the additive. The lubricating oil additive exhibits a thickening effect higher than those of conventional acrylic lubricating oil additives and can improve the viscosity index of lubricating oil even when added in a small amount. Further, the additive can also improve the low-temperature characteristics, flow characteristics, and shear stability. The lubricating oil compositions enable energy saving and can lengthen the lifetime of lubricating oil and reduce the load on the global environment.Type: GrantFiled: July 14, 2005Date of Patent: May 18, 2010Assignee: Kuraray Co., Ltd.Inventors: Yoshihiro Morishita, Noboru Higashida, Hidetaka Oonuma, Kenichi Hamada, Kazushige Ishiura
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Publication number: 20100119797Abstract: [Problems] To provide a polymer composition that simultaneously has excellent paintability and high oil resistance and is also excellent in thin-wall moldability and flexibility; and a molded article produced by injection-molding of the composition and being suitable for composite-molded grips, automotive interior and exterior trims, and so on.Type: ApplicationFiled: March 26, 2008Publication date: May 13, 2010Applicant: KURARAY CO., LTD.Inventors: Hiroshi Oshima, Toyoaki Kurihara, Akiko Ide, Kenichi Hamada
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Publication number: 20100025133Abstract: A power supply system is provided for supplying power to a first drive device and a second drive device functioning as a drive source of a moving body. A fuel cell and a storage battery device are connected via a power conversion device. The fuel cell can supply power to the first drive device and the storage battery device can supply power to the second drive device, respectively, without using the power conversion device. When an output request from the moving body is a normal output request, power is supplied to each of the drive devices by the fuel cell and the storage battery device, respectively. Only when power to be supplied to the first drive device as in the output request from the moving body is greater than an amount of power that can be generated by the fuel cell, that power supply from the storage battery device to the first drive device via the power conversion device is permitted.Type: ApplicationFiled: February 13, 2008Publication date: February 4, 2010Inventors: Kenichi Hamada, Nobuyuki Kitamura
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Publication number: 20100025134Abstract: An electric power supply system, equipped on a mobile body to supply electric power to a drive apparatus that functions as a drive source of the mobile body, that includes a first power source apparatus that generates and supplies electric power to the drive apparatus, a second power source apparatus provided separately from the first power source apparatus and that supplies electric power to the drive apparatus, an insulation type converter provided between an electric power supply section including at least one of the first power source apparatus and the second power source apparatus, and a mobile body drive section including the drive apparatus, and ensuring insulation between these sections while transmitting electric power from the electric power supply section to the mobile body drive section. An increase in the supply voltage and adequate insulation performance can both be achieved when supplying power to a drive apparatus.Type: ApplicationFiled: November 12, 2007Publication date: February 4, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenichi Hamada, Nobuyuki Kitamura
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Publication number: 20100013301Abstract: An electric power supply system mounted on a moving body, which supplies electric power from a plurality of direct-current power source devices to an alternating-current drive apparatus that functions as a drive source of the moving body. Each of the plurality of direct-current power source devices is connected to a corresponding inverter, which converts a direct-current output of the direct-current power source device into an alternating-current output, thereby forming one alternating-current output unit. Alternating-current wirings are used to make connection between each alternating-current output unit and the alternating-current drive apparatus and between respective alternating-current output units. Thereby, it is possible to keep electrical insulation between electric power supply wirings and a moving body with relative ease and also make connection between the direct-current power source devices in a simple and easy way.Type: ApplicationFiled: November 12, 2007Publication date: January 21, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenichi Hamada, Nobuyuki Kitamura
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Publication number: 20100015497Abstract: The present invention provides a separator for a fuel cell comprising a resin and a conductive material as constituting components, and sulfonic acid groups imparted to at least one portion at the surface of gas channels by a treatment using a sulfuric acid-containing gas, wherein the resin and the sulfonic acid groups, which are on the surface of the gas channels, are bonded, and a ratio of sulfur atoms in the sulfonic acid groups at the surface of the gas channels as determined by energy-dispersive X-ray spectroscopy is in a range from 0.1 to 4.0 at %, and a method for producing the separator. The separator for a fuel cell of the present invention is excellent in the wettability to water, since sulfonic acid groups are imparted to the resin at the surface of gas channels in the sulfuric acid-containing gas.Type: ApplicationFiled: June 16, 2006Publication date: January 21, 2010Applicant: DAINIPPON INK AND CHEMICALS, INC.Inventors: Kenichi Hamada, Takayuki Kanematsu, Takashi Kawamura, Tetsuya Harada
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Patent number: 7642738Abstract: A power steering apparatus includes an electric motor, a temperature sensor, and a control unit. The electric motor produces an assist steering effort in a steering system. The temperature sensor measures a temperature of a first portion subject to thermal influence of operation of the electric motor. The control unit determines an estimated temperature of a second portion in accordance with a value of a motor current, the second portion being subject to thermal influence of operation of the electric motor. The control unit determines a first upper limit value in accordance with the measured temperature; determines a second upper limit value in accordance with the estimated temperature; limit the motor current to a smaller one of the first and second upper limit values, when determining that the temperature sensor is normal; limit the motor current to the second upper limit value, when determining that the temperature sensor is abnormal.Type: GrantFiled: August 28, 2007Date of Patent: January 5, 2010Assignee: Hitachi, Ltd.Inventors: Kenichi Hamada, Tamotsu Yamaura, Atsushi Matsuoka, Yutaka Makino
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Publication number: 20090308719Abstract: When a car driver has backwardly pushed a four-way knob, both legs of a push knob slidably move along a guide surface of an internal pusher member, whereby the four-way knob is tilted along with the push knob. When the car driver has backwardly pushed the push knob while the push knob and the four-way knob remain tilted, the push knob linearly, backwardly moves in conjunction with the four-way knob, whereby an internal switch and an external switch are operated. Therefore, the push knob can be illuminated by an internal LED of a switching board by way of a through hole of the internal pusher member.Type: ApplicationFiled: June 16, 2009Publication date: December 17, 2009Inventors: Kenichi Hamada, Eiichi Hayakawa, Tetsuya Futamura, Fumitaka Hayase
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Publication number: 20090305068Abstract: Pressure-sensitive adhesives for optical films exhibit high cohesion, excellent re-workability, adhesion properties, heat resistance and durability without chemical crosslinking. A pressure-sensitive adhesive contains an acrylic triblock copolymer (I) at not less than 60% by mass based on the total mass of all solids contained in the pressure-sensitive adhesive, the acrylic triblock copolymer being represented by the formula A1-B-A2 wherein: A1 and A2 are each independently an alkyl methacrylate polymer block having Tg of not less than 100° C. and B is an acryl acrylate polymer block having Tg of not more than ?20° C.; the content of the polymer block B is 50 to 95% by mass; Mw is in the range of 50,000 to 300,000; and the molecular weight distribution is in the range of 1.0 to 1.5.Type: ApplicationFiled: November 26, 2007Publication date: December 10, 2009Applicant: KURARAY CO., LTD.Inventors: Yoshihiro Morishita, Kenichi Hamada, Tetsuya Kunimune, Kazushige Ishiura
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Publication number: 20090239433Abstract: A polylactic acid composition comprising (A) a polylactic acid-series resin and (B) an acrylic triblock copolymer is prepared. The composition fulfills the following requirements: (1) the acrylic triblock copolymer (B) is a triblock polymer comprising (B1) a polymer block having a glass-transition temperature of not higher than 25° C., (B2a) a polymer block which has a glass-transition temperature of not lower than 60° C. and is bound to a terminal of the polymer block (B1), and (B2b) a polymer block which has a glass-transition temperature of not lower than 60° C. and is bound to another terminal thereof; (2) the polymer block (B1) comprises a main structural unit derived from an acrylate, and the polymer block (B2a) and the polymer block (B2b) independently comprise a main structural unit derived from a methacrylate; and (3) both of the weight-average molecular weights of the polymer block (B2a) and polymer block (B2b) are smaller than the weight-average molecular weight of the polymer block (B1).Type: ApplicationFiled: November 21, 2006Publication date: September 24, 2009Applicant: KURARAY CO., LTDInventors: Toyoaki Kurihara, Kenichi Hamada, Akiko Ide, Eiji Iwasa, Tomokazu Ise, Yoshihiro Morishita, Hiroshi Oshima
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Publication number: 20090226792Abstract: A vehicle includes a front seat that is slid with respect to a vehicle body backward and forward in order to adjust the seating position of an occupant. A fuel cell is attached to the bottom face of the front seat.Type: ApplicationFiled: November 6, 2006Publication date: September 10, 2009Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Kenichi Hamada
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Publication number: 20090206828Abstract: A failure detection apparatus for a resolver outputting a sine signal indicative of sin ? and a cosine signal indicative of cos ? according to a rotational angle ? of a rotator, includes an inspection value calculating section configured to calculate an inspection value based on at least one of the sine signal and the cosine signal; a failure detecting section configured to judge whether the resolver is in a failure state or not on the basis of the inspection value; a counting section configured to gradually increase a count value with a lapse of time when the failure detecting section is determining that the resolver is in the failure state, and configured to gradually decrease the count value with a lapse of time when the failure detecting section is determining that the resolver is not in the failure state; and a failure deciding section configured to finally decide that the resolver has caused the failure on the basis of the count value.Type: ApplicationFiled: February 11, 2009Publication date: August 20, 2009Inventors: Tamotsu YAMAURA, Kenichi Hamada, Yutaka Makino
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Publication number: 20090202818Abstract: In order to provide an adhesive product capable of effectively maintaining security, the present invention is a pressure sensitive transfer tape (1) in which an acrylic adhesive is adopted as an adhesive (100) in which diblock copolymer 101: 100 parts by weight and triblock copolymer 102: 100 parts by weight consisting of methylmethacrylate polymer block (M) and butylacrylate polymer block (A), acrylic oligomer-based tackifier 103: 40 to 60 parts by weight, and rosin ester-based tackifier 104: 200 parts by weight are mixed.Type: ApplicationFiled: January 6, 2006Publication date: August 13, 2009Applicants: KOKUYO S&T CO., LTD., KURARAY CO., LTD.Inventors: Hiroyuki Kasahara, Kazushige Kawashita, Toyoaki Kurihara, Tetsuya Kunimune, Kenichi Hamada