Patents by Inventor Keiichi Nakamura
Keiichi Nakamura 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: 20210151932Abstract: A connector that includes a male connector; and a female connector including a housing to be fit to the male connector along a connecting direction, wherein: a first connector of the male connector and the female connector is fixed with a second connector of the male connector and the female connector connected and, a rigidity k [N/m] satisfies k<360000 when the second connector is distorted at a test speed of 1 mm/min in a direction intersecting the connecting direction and satisfies k?(2.0×107)×m, where m [kg] denotes a mass of the second connector.Type: ApplicationFiled: June 26, 2018Publication date: May 20, 2021Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takeshi MASUDA, Tomoyuki SAKATA, Hiromu OTANI, Takehide TERASAWA, Keiichi NAKAMURA, Takahiko SAITOU
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Publication number: 20210122244Abstract: A power supply system includes a first circuit, a second circuit and a voltage controller. The first circuit includes a first power supply line connected to each of a first load, a power supply source, and a first battery. The second circuit includes a second power supply line connected to a second load and a second battery connected to the second power supply line. The voltage controller includes a DC-DC converter connected between the first power supply line and the second power supply line. The second load is able to perform a function that substitutes for at least part of a function that the first load performs. The voltage controller includes a converter control unit configured to control the DC-DC converter such that an output voltage higher than or equal to a voltage of the second battery is output to the second power supply line.Type: ApplicationFiled: January 5, 2021Publication date: April 29, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Keiichi NAKAMURA
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Patent number: 10913356Abstract: A power supply system includes a first circuit, a second circuit and a voltage controller. The first circuit includes a first power supply line connected to each of a first load, a power supply source, and a first battery. The second circuit includes a second power supply line connected to a second load and a second battery connected to the second power supply line. The voltage controller includes a DC-DC converter connected between the first power supply line and the second power supply line. The second load is able to perform a function that substitutes for at least part of a function that the first load performs. The voltage controller includes a converter control unit configured to control the DC-DC converter such that an output voltage higher than or equal to a voltage of the second battery is output to the second power supply line.Type: GrantFiled: January 29, 2018Date of Patent: February 9, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Keiichi Nakamura
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Publication number: 20200290889Abstract: A method for producing a vanadate extracts a vanadium component included in combustion fly ash or clinker. In the method, a vanadium component is recovered as a vanadate from combustion fly ash or clinker, the method including the following steps 1 to 5: (1) a step of adding an aqueous sodium hydroxide solution to combustion fly ash or clinker so that the water content is 5 to 35% by mass (step 1); (2) a step of mixing or kneading (step 2); (3) a step of heating the mixed or kneaded mixture (step 3); (4) a step of adding water to the mixture that has undergone the heating step in the step 3 to form a slurry (step 4); and (5) a step of recovering a vanadate in the aqueous phase after the solid-liquid separation of the slurry (step 5).Type: ApplicationFiled: November 22, 2018Publication date: September 17, 2020Applicant: SHOWA DENKO K.K.Inventors: Junichi AKIYAMA, Keiichi NAKAMURA
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Publication number: 20200219755Abstract: A wafer mounting table includes a first electrode and a second electrode buried inside of a ceramic substrate having a wafer mounting surface so as to be parallel to the wafer mounting surface with the first electrode closer to the wafer mounting surface than the second electrode. The wafer mounting table includes a conductive section that electrically conducts the first electrode and the second electrode. The conductive section is such that a plurality of circular members comprised of plate-shaped metal meshes parallel to the wafer mounting surface are stacked between the first electrode and the second electrode.Type: ApplicationFiled: February 24, 2020Publication date: July 9, 2020Applicant: NGK INSULATORS, LTD.Inventors: Yuji AKATSUKA, Masaki ISHIKAWA, Kazuhiro NOBORI, Akiyoshi HATTORI, Keiichi NAKAMURA
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Patent number: 10620757Abstract: An input device includes a casing having a recess in its inner surface, and a pressure-sensitive sensor disposed in the recess. The pressure-sensitive sensor is fixed in the recess so that a sensing surface of the pressure-sensitive sensor and a bottom surface of the recess are in contact with each other.Type: GrantFiled: January 26, 2016Date of Patent: April 14, 2020Assignee: Sony CorporationInventors: Yoshiteru Taka, Takeshi Koizumi, Tomoki Kawabata, Munetake Ebihara, Tatsuya Nakazawa, Machiko Endo, Takuya Goto, Keiichi Nakamura, Yukio Sakakibara
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Patent number: 10344627Abstract: According to the embodiment of the present invention, there are provided a first stage auxiliary burner configured to heat up the exhaust gas in the upstream side of the superheater, a second stage auxiliary burner configured to heat up the exhaust gas in the upstream side of the evaporator, a fuel supply system configured to distribute fuel so as to be supplied to the first stage auxiliary burner and the second stage auxiliary burner. Distribution of fuel charged to each of the first stage auxiliary burner and the second stage auxiliary burner is controlled in accordance with a predetermined distribution ratio of each charging quantity to whole charging quantity in all the range thereof.Type: GrantFiled: January 17, 2018Date of Patent: July 9, 2019Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Keiichi Nakamura, Hideaki Shimada
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Publication number: 20190025545Abstract: A zoom lens comprises, in order from an object: a first lens group (G1) having positive refractive power; a second lens group (G2) having negative refractive power; a third lens group (G3) having positive refractive power; a fourth lens group (G4) having negative refractive power; and a fifth lens group (G5) having positive refractive power, in which the first to the fifth lens groups (G1 to G5) each move in an optical axis direction upon zooming from a wide angle end state to a telephoto end state, at least a part of the fourth lens group (G4) is configured to serve as a focusing lens group to move in the optical axis direction upon focusing, the first lens group (G1) consists of two lenses, and the following conditional expression is satisfied. 0.30<GD3/ft<0.8 where, GD3 denotes a thickness of the third lens group (G3) on the optical axis, and ft denotes a focal length of the zoom lens in the telephoto end state.Type: ApplicationFiled: September 30, 2016Publication date: January 24, 2019Inventor: Keiichi NAKAMURA
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Patent number: 10101568Abstract: A zoom lens includes, in order from the object side: a first lens group (G1) having positive refractive power, a second lens group (G2) having negative refractive power, a third lens group (G3) having positive refractive power, and a fourth lens group (G4) having positive refractive power. Upon zooming from the wide angle end state to the telephoto end state, the interval between each lens group changes and the fourth lens group (G4) moves to the image side after having once moved to the object side. The third lens group (G3) has, in order from the object side, a positive lens, a positive lens, and a negative lens. The zoom lens satisfies the following conditional expression: 2.50<TLt/(fw*ft)1/2<3.30, where TLt is the total length of the zoom lens in the telephoto state, fw is the focal distance of the total zoom lens system in the wide angle state, and ft is the focal distance of the total zoom lens system in the telephoto state.Type: GrantFiled: June 26, 2014Date of Patent: October 16, 2018Assignee: Nikon CorporationInventor: Keiichi Nakamura
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Patent number: 10087786Abstract: In one embodiment, a combined cycle power plant includes first and second superheaters to generate first and second main steams, first and second reheaters to heat first and second discharge steams to generate first and second reheat steams, and a steam turbine to be supplied with the merged first and second reheat steams. The plant further includes a first valve to adjust a flow rate of the first discharge or reheat steam, and a second valve to adjust a flow rate of the second discharge or reheat steam. A plant control apparatus includes a determination module to determine a target opening degree of the second valve by using flow rates of the first and second main steams, and a controller to compare the determined target opening degree with a valve opening degree of the second valve and to control the second valve based on a comparison result.Type: GrantFiled: September 2, 2015Date of Patent: October 2, 2018Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Hikaru Kiga, Masayuki Tobo, Toyohiro Akebi, Keiichi Nakamura
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Publication number: 20180219407Abstract: A power supply system includes a first circuit, a second circuit and a voltage controller. The first circuit includes a first power supply line connected to each of a first load, a power supply source, and a first battery. The second circuit includes a second power supply line connected to a second load and a second battery connected to the second power supply line. The voltage controller includes a DC-DC converter connected between the first power supply line and the second power supply line. The second load is able to perform a function that substitutes for at least part of a function that the first load performs. The voltage controller includes a converter control unit configured to control the DC-DC converter such that an output voltage higher than or equal to a voltage of the second battery is output to the second power supply line.Type: ApplicationFiled: January 29, 2018Publication date: August 2, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Keiichi NAKAMURA
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Publication number: 20180142580Abstract: According to the embodiment of the present invention, there are provided a first stage auxiliary burner configured to heat up the exhaust gas in the upstream side of the superheater, a second stage auxiliary burner configured to heat up the exhaust gas in the upstream side of the evaporator, a fuel supply system configured to distribute fuel so as to be supplied to the first stage auxiliary burner and the second stage auxiliary burner. Distribution of fuel charged to each of the first stage auxiliary burner and the second stage auxiliary burner is controlled in accordance with a predetermined distribution ratio of each charging quantity to whole charging quantity in all the range thereof.Type: ApplicationFiled: January 17, 2018Publication date: May 24, 2018Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Keiichi NAKAMURA, Hideaki SHIMADA
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Publication number: 20180039353Abstract: An input device includes a casing having a recess in its inner surface, and a pressure-sensitive sensor disposed in the recess. The pressure-sensitive sensor is fixed in the recess so that a sensing surface of the pressure-sensitive sensor and a bottom surface of the recess are in contact with each other.Type: ApplicationFiled: January 26, 2016Publication date: February 8, 2018Applicant: Sony CorporationInventors: Yoshiteru Taka, Takeshi Koizumi, Tomoki Kawabata, Munetake Ebihara, Tatsuya Nakazawa, Machiko Endo, Takuya Goto, Keiichi Nakamura, Yukio Sakakibara
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Patent number: 9719617Abstract: In a threaded joint for steel pipes comprising a pin (1) and a box (2), each having a threaded portion (11 or 21), a sealing surface (13 or 23), and a shoulder surface (14, 15 or 24, 25), the sealing surface (13) of the pin (1) is formed by a tapered surface, and the sealing surface (23) of the box (2) is formed by a first curved surface portion with a large radius of curvature in the range of 15-120 mm, a tapered surface portion, and a second curved surface portion with a large radius of curvature again in the range of 15-120 mm.Type: GrantFiled: April 18, 2011Date of Patent: August 1, 2017Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, VALLOUREC OIL AND GAS FRANCEInventors: Takashi Okada, Keiichi Nakamura, Masaaki Sugino, Suguru Yamaguchi
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Patent number: 9605781Abstract: A threaded tubular connection includes a female threaded portion at a first tubular component end and a male threaded portion at a second tubular component end, the female threaded portion including a female thread, at least one female sealing surface on its inner peripheral surface, and at least one female axial abutment surface, the male threaded portion including a male thread, at least one male sealing surface on its outer peripheral surface, at least one axial abutment surface, and a lip disposed between the sealing surface and an axial abutment surface located at a free end of the threaded portion distant from the thread, the male thread being made up into the female thread such that at least one male axial abutment surface is in contact with at least one female axial abutment surface, at least one male sealing surface being in interference contact with at least one corresponding female sealing surface, the portion of the lip between the sealing surface and the axial abutment surface being radially distType: GrantFiled: November 3, 2008Date of Patent: March 28, 2017Assignees: VALLOUREC OIL AND GAS FRANCE, NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Sylvain Beigneux, Daly Daly, Bertrand Maillon, Claire Patureau, Eric Verger, Michihiko Iwamoto, Keiichi Nakamura, Masaaki Sugino, Suguru Yamaguchi
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Patent number: 9568125Abstract: A threaded joint for steel pipes comprising a pin (1) and a box (2). The pin has a male thread (11) and a lip (12) which comprises (i) a sealing surface (13) and (ii) a nose portion (16) provided with a shoulder surface. The box has a female thread (21), a sealing surface (23) and a shoulder surface. The shoulder surface of the pin comprises two distinct adjacent surfaces, main shoulder (14) in the inner side and sub shoulder (15) in the outer side. Correspondingly, the shoulder surface of the box comprises two distinct adjacent surfaces, main shoulder (24) in the inner side and sub shoulder (25) in the outer side. The main shoulder surfaces of the pin and box are disposed such as to prevent a radially inward deformation of the lip end, and the sub shoulder surfaces of pin and box are disposed such as to limit a radially outward deformation of the lip end.Type: GrantFiled: May 6, 2010Date of Patent: February 14, 2017Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, VALLOUREC OIL AND GAS FRANCEInventors: Suguru Yamaguchi, Keiichi Nakamura, Masaaki Sugino, Michihiko Iwamoto, Gabriel Briquet, Claire Patureau, Daly Daly, Bertrand Maillon, Sylvain Beigneux
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Patent number: 9528396Abstract: An auxiliary burner configured to heat exhaust gas on an upstream side of any one of heat exchangers, and a fuel supply system configured to supply fuel to the auxiliary burner. To avoid damage of a heat-transfer pipe by exhaust gas of high temperature, a reference value on which the restriction on the charging quantity to be supplied to the auxiliary burner is based is set, and the charging quantity of fuel to the auxiliary burner is restricted so as not to exceed a limit defined by the reference value.Type: GrantFiled: March 26, 2012Date of Patent: December 27, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Keiichi Nakamura, Hideaki Shimada
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Patent number: 9416686Abstract: A heat recovery steam generator has a plurality of heat exchangers, including superheaters 28, 30, an evaporator 32 and an economizer 34, disposed in a duct 27 along the flow direction of an exhaust gas 25 from a gas turbine 14, and generates steam by utilizing the exhaust gas 25 from the gas turbine 14. The heat recovery steam generator includes: auxiliary combustors 50, 52, each disposed upstream of one of the heat exchangers, for heating the exhaust gas by means of burners; and an air supply device for supplying air to the burners of the auxiliary combustor 52 from the outside of the duct.Type: GrantFiled: November 26, 2013Date of Patent: August 16, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Keiichi Nakamura, Hideaki Shimada
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Publication number: 20160161724Abstract: A zoom lens includes, in order from the object side: a first lens group (G1) having positive refractive power, a second lens group (G2) having negative refractive power, a third lens group (G3) having positive refractive power, and a fourth lens group (G4) having positive refractive power. Upon zooming from the wide angle end state to the telephoto end state, the interval between each lens group changes and the fourth lens group (G4) moves to the image side after having once moved to the object side. The third lens group (G3) has, in order from the object side, a positive lens, a positive lens, and a negative lens. The zoom lens satisfies the following conditional expression: 2.50<TLt/(fw*ft)1/2<3.30, where TLt is the total length of the zoom lens in the telephoto state, fw is the focal distance of the total zoom lens system in the wide angle state, and ft is the focal distance of the total zoom lens system in the telephoto state.Type: ApplicationFiled: June 26, 2014Publication date: June 9, 2016Inventor: Keiichi NAKAMURA
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Patent number: 9351915Abstract: An ascorbic acid derivative composition of a first aspect according to the present invention consists of a salt of a compound (1) represented by a general formula (1) shown below; and a salt of a compound (2) represented by a general formula (2) shown below, wherein a ratio of the salt of the compound (2) with respect to a total amount of the salt of the compound (1) and the salt of the compound (2) is from 0.1 to 10% by mass, wherein R1 represents a linear or branched alkyl group of 6 to 20 carbon atoms, R2 represents a linear or branched alkyl group of 6 to 20 carbon atoms, and R1 and R2 are the same or are different from each other.Type: GrantFiled: October 11, 2013Date of Patent: May 31, 2016Assignee: Showa Denko K.K.Inventors: Keiichi Nakamura, Takanori Aoki