Patents by Inventor Yusuke Okamoto
Yusuke Okamoto 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: 20110165048Abstract: First, the emission amount of nitrogen oxides can be decreased close to zero as much as possible, and the emission amount of carbon monoxide is decreased to a permissible range. Second, energy saving by combustion at a low air ratio close to 1.0 is realized. Third, air ratio control is performed stably in a combustion region at a low air ratio.Type: ApplicationFiled: April 13, 2007Publication date: July 7, 2011Applicant: MIURA CO., LTD.Inventors: Osamu Tanaka, Yukihiro Tokunaga, Yusuke Okamoto, Kenji Yasui
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Patent number: 7972581Abstract: First, the emission amount of nitrogen oxides can be decreased close to zero as much as possible, and the emission amount of carbon monoxide is decreased to a permissible range. Second, energy saving by combustion at a low air ratio close to 1.0 is realized. Third, air ratio control is performed stably in a combustion region at a low air ratio.Type: GrantFiled: April 13, 2007Date of Patent: July 5, 2011Assignee: Miura Co., Ltd.Inventors: Osamu Tanaka, Yukihiro Tokunaga, Yusuke Okamoto, Kenji Yasui
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Publication number: 20110005228Abstract: A steam engine and an electric motor are arranged, which respectively drives an air compressor. The compressed air from the air compressor is supplied to a compressed air using device through a common air tank. The steam is supplied to the steam engine through a steam supply path, and the steam used in the steam engine is supplied to a steam using device through a steam exhaust path. The steam pressure is monitored by a pressure sensor arranged in a steam header ahead of the steam exhaust path. The air pressure is monitored by a pressure sensor arranged in an air tank. A steam supply valve is controlled based on the steam pressure and the air pressure, and the electric motor is controlled based on the air pressure. The steam engine is preferentially driven over the electric motor by shifting the target value of the air pressure.Type: ApplicationFiled: April 14, 2008Publication date: January 13, 2011Applicant: MIURA CO., LTDInventors: Yuji Yoshinari, Yasuo Ochi, Hideo Furukawa, Yasukuni Tanaka, Yusuke Okamoto, Kazutaka Baba
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Publication number: 20110000180Abstract: An air compressor is driven by a steam engine that generates power using steam. The steam is supplied to the steam engine through a steam supply path, and the steam is exhausted through a steam exhaust path. The steam from the steam engine is supplied to a steam using device through a steam header. The usage load of the steam is monitored by a pressure sensor arranged in the steam header. The compressed air from the air compressor is supplied to a compressed air using device through a compressed air path. The usage load of the compressed air is monitored by a pressure sensor arranged on the compressed air path. The steam supply to the steam engine is controlled based on the usage load of the steam and the usage load of the compressed air.Type: ApplicationFiled: August 26, 2008Publication date: January 6, 2011Applicant: MIURA CO., LTDInventors: Yuji Yoshinari, Yasuo Ochi, Hideo Furukawa, Yasukuni Tanaka, Yusuke Okamoto, Kazutaka Baba
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Publication number: 20100227283Abstract: A combustion method applied to a water-tube boiler and a regenerator of an absorption-type refrigerator includes a concentration ratio adjusting step of adjusting a concentration ratio of nitrogen oxides, carbon monoxide, and oxygen in a gas from a gas generation source to a predetermined reference concentration ratio, and a hazardous-substance decreasing step of decreasing nitrogen oxides, using an oxidation catalyst having characteristics of decreasing the concentrations of nitrogen oxides and carbon monoxide on a secondary side to substantially zero when the concentration ratio on a primary side is set to be a reference concentration ratio, in which the concentration ratio adjusting step detects the concentration of oxygen on the secondary side of the oxidation catalyst to control the concentration ratio so that a detected oxygen concentration becomes a set oxygen concentration substantially close to zero.Type: ApplicationFiled: February 18, 2008Publication date: September 9, 2010Applicant: MIURA CO., LTD.Inventors: Osamu Tanaka, Yukihiro Tokunaga, Yusuke Okamoto, Kenji Yasui
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Patent number: 7771821Abstract: A low-friction sliding member such as a piston, a piston ring, a piston skirt section and a cylinder liner section of an internal combustion engine. The low-friction sliding member includes a base material having a surface. A hard carbon thin film is formed at at least a part of the surface of the base material. Here, a tribo-film having at least one functional group selected from the group consisting of ether linkage, oxido and hydroxyl group is formed on the hard carbon thin film when the hard carbon thin film is in slidable contact with an opposite member in presence of an organic oxygen-containing compound.Type: GrantFiled: August 5, 2004Date of Patent: August 10, 2010Assignee: Nissan Motor Co., Ltd.Inventors: Jean Michel Martin, Saihei Kano, Makoto Kano, Yoshiteru Yasuda, Yusuke Okamoto, Yutaka Mabuchi, Takafumi Ueno
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Publication number: 20090042152Abstract: First, to decrease an amount of emitted nitrogen oxides to zero as much as possible and also decrease an amount of emitted carbon monoxide to a permissible level. Second, to save energy on combustion at a low air ratio close to 1.0. Third, to attain a stable air ratio control in a low air ratio combustion region.Type: ApplicationFiled: April 13, 2007Publication date: February 12, 2009Applicant: MIURA CO., LTD.Inventors: Osamu Tanaka, Yukihiro Tokunaga, Yusuke Okamoto, Kenji Yasui
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Publication number: 20090025655Abstract: First, an emission amount of nitrogen oxide can be decreased to zero as much as possible and, an emission amount of carbon monoxide is decreased to a permissible range. Second, energy saving by combustion at a low air ratio close to 1.0 is realized. Third, air ratio control is performed stably in a combustion region at a low air ratio.Type: ApplicationFiled: April 13, 2007Publication date: January 29, 2009Applicant: MIURA CO., LTD.Inventors: Osamu Tanaka, Yukihiro Tokunaga, Yusuke Okamoto, Kenji Yasui
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Publication number: 20080276755Abstract: A gear comprised of a tooth surface and a hard carbon film formed on at least a part of the tooth surface. When the gear is used in lubricant including a specific component, a friction of a tooth surface of the gear is largely decreased, and therefore the gear performs an excellent power transmission efficiency. Further, when the gear is employed in a planetary gear mechanism or speed reducing mechanism which has a plurality of meshing portions of gears, the power transmission efficiency of the mechanism is also improved.Type: ApplicationFiled: July 23, 2008Publication date: November 13, 2008Inventors: Yusuke OKAMOTO, Yoshiteru Yasuda, Takuro Yamaguchi, Makoto Kano
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Publication number: 20070249507Abstract: Provided is a hard carbon film, which is to be used in a sliding member, more specifically, at a sliding site thereof in contact with a counter member. The hard carbon film contains at least one of cobalt and nickel in a total content within the range of more than 1.4 to less than 39 atom % and contains cobalt and nickel aggregates having a diameter of beyond 5 nm within a predetermined ratio or less. In this way, the hard carbon film reduced in friction coefficient than ever, manufactured in a simple process, and effectively working in a wide variety of lubricating oils can be provided.Type: ApplicationFiled: April 20, 2007Publication date: October 25, 2007Inventors: Yusuke Okamoto, Yoshiteru Yasuda, Takeshi Yamauchi
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Patent number: 7255083Abstract: A sliding structure for an automotive engine includes a sliding member with a sliding portion and a lubricant applied to the sliding portion so that the sliding portion can make sliding contact with a counterpart member via the lubricant. The sliding member is either of a piston ring, a piston pin, a cam lobe, a cam journal, a plain bearing, a rotary vane and a timing chain. The sliding portion has a base made of a steel or aluminum material and a hard carbon film formed on the base to coat the sliding portion. The hard carbon film has a thickness of 0.3 to 2.0 ?m, a Knoop hardness of 1500 to 4500 kg/mm2, a surface roughness Ry (?m) satisfying the following equation: Ry<{(0.75?Hk/8000)×h+0.07/0.8}, where h is the thickness (?m) of the film; and Hk is the Knoop hardness (kg/mm2) of the film.Type: GrantFiled: May 2, 2005Date of Patent: August 14, 2007Assignee: Nissan Motor Co., Ltd.Inventors: Takahiro Hamada, Yutaka Mabuchi, Makoto Kano, Yoshiteru Yasuda, Yusuke Okamoto
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Publication number: 20060093839Abstract: There is provided a sliding member including a base substrate and a hard carbon coating formed on the base substrate to define at least a surface for sliding contact with an opposing member. The hard carbon coating contains therein at least one of cobalt and nickel in an amount of 1.4 to 39 atomic %.Type: ApplicationFiled: October 26, 2005Publication date: May 4, 2006Inventors: Yusuke Okamoto, Yoshiteru Yasuda, Shojiro Miyake
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Publication number: 20050188942Abstract: A sliding structure for an automotive engine includes a sliding member with a sliding portion and a lubricant applied to the sliding portion so that the sliding portion can make sliding contact with a counterpart member via the lubricant. The sliding member is either of a piston ring, a piston pin, a cam lobe, a cam journal, a plain bearing, a rotary vane and a timing chain. The sliding portion has a base made of a steel or aluminum material and a hard carbon film formed on the base to coat the sliding portion. The hard carbon film has a thickness of 0.3 to 2.0 ?m, a Knoop hardness of 1500 to 4500 kg/mm2, a surface roughness Ry (?m) satisfying the following equation: Ry<{(0.75?Hk/8000)×h+0.07/0.8}, where h is the thickness (?m) of the film; and Hk is the Knoop hardness (kg/mm2) of the film.Type: ApplicationFiled: May 2, 2005Publication date: September 1, 2005Inventors: Takahiro Hamada, Yutaka Mabuchi, Makoto Kano, Yoshiteru Yasuda, Yusuke Okamoto
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Patent number: 6886521Abstract: A sliding structure for an automotive engine includes a sliding member with a sliding portion and a lubricant applied to the sliding portion so that the sliding portion can make sliding contact with a counterpart member via the lubricant. The sliding member is either of a piston ring, a piston pin, a cam lobe, a cam journal, a plain bearing, a rotary vane and a timing chain. The sliding portion has a base made of a steel or aluminum material and a hard carbon film formed on the base to coat the sliding portion. The hard carbon film has a thickness of 0.3 to 2.0 ?m, a Knoop hardness of 1500 to 4500 kg/mm2, a surface roughness Ry (?m) satisfying the following equation: Ry<{(0.75?Hk/8000)×h+0.07/0.8}, where h is the thickness (?m) of the film; and Hk is the Knoop hardness (kg/mm2) of the film.Type: GrantFiled: October 10, 2003Date of Patent: May 3, 2005Assignee: Nissan Motor Co., Ltd.Inventors: Takahiro Hamada, Yutaka Mabuchi, Makoto Kano, Yoshiteru Yasuda, Yusuke Okamoto
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Publication number: 20050064196Abstract: A low-friction sliding member such as a piston, a piston ring, a piston skirt section and a cylinder liner section of an internal combustion engine. The low-friction sliding member includes a base material having a surface. A hard carbon thin film is formed at at least a part of the surface of the base material. Here, a tribo-film having at least one functional group selected from the group consisting of ether linkage, oxido and hydroxyl group is formed on the hard carbon thin film when the hard carbon thin film is in slidable contact with an opposite member in presence of an organic oxygen-containing compound.Type: ApplicationFiled: August 5, 2004Publication date: March 24, 2005Inventors: Jean Martin, Saihei Kano, Makoto Kano, Yoshiteru Yasuda, Yusuke Okamoto, Yutaka Mabuchi, Takafumi Ueno
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Publication number: 20050025975Abstract: A gear comprised of a tooth surface and a hard carbon film formed on at least a part of the tooth surface. When the gear is used in lubricant including a specific component, a friction of a tooth surface of the gear is largely decreased, and therefore the gear performs an excellent power transmission efficiency. Further, when the gear is employed in a planetary gear mechanism or speed reducing mechanism which has a plurality of meshing portions of gears, the power transmission efficiency of the mechanism is also improved.Type: ApplicationFiled: July 30, 2004Publication date: February 3, 2005Inventors: Yusuke Okamoto, Yoshiteru Yasuda, Takuro Yamaguchi, Makoto Kano
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Publication number: 20040074467Abstract: A sliding structure for an automotive engine includes a sliding member with a sliding portion and a lubricant applied to the sliding portion so that the sliding portion can make sliding contact with a counterpart member via the lubricant. The sliding member is either of a piston ring, a piston pin, a cam lobe, a cam journal, a plain bearing, a rotary vane and a timing chain. The sliding portion has a base made of a steel or aluminum material and a hard carbon film formed on the base to coat the sliding portion. The hard carbon film has a thickness of 0.3 to 2.0 &mgr;m, a Knoop hardness of 1500 to 4500 kg/mm2, a surface roughness Ry (&mgr;m) satisfying the following equation: Ry<{(0.75−Hk/8000)×h+0.07/0.8}, where h is the thickness (&mgr;m) of the film; and Hk is the Knoop hardness (kg/mm2) of the film.Type: ApplicationFiled: October 10, 2003Publication date: April 22, 2004Applicant: NISSAN MOTOR CO., LTD.Inventors: Takahiro Hamada, Yutake Mabuchi, Makoto Kano, Yoshiteru Yasuda, Yusuke Okamoto
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Patent number: 5541143Abstract: The invention relates to a sintered composite of silicon carbide and silicon nitride. The sintered composite includes a polycrystalline matrix and polycrystalline aggregates dispersed in the matrix. The matrix includes silicon carbide grains, first silicon-nitride grains and a first sintering aid thereof. Each of the aggregates includes second silicon-nitride grains and a second sintering aid thereof. The aggregates have an average diameter within a range from 10 .mu.m to 50 .mu.m. This average diameter is defined as a diameter of a circle having an area which is the same as the average area of the aggregates on a two-dimensional section of the sintered composite. The sintered composite is light in weight and superior in strength and fracture toughness at high temperature as well as at room temperature.Type: GrantFiled: August 29, 1995Date of Patent: July 30, 1996Assignee: Nissan Motor Co., Ltd.Inventors: Naoto Hirosaki, Yoshio Akimune, Yusuke Okamoto
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Patent number: 4742569Abstract: In a tuning circuit for AM receiver, tuning coils, oscillation coils and capacitance elements of an antenna tuning circuit, a radio frequency amplifier circuit, and a local oscillator circuit are accommodated in discrete shield casings for high frequency coils; and the discrete shield casings are disposed in a row and united with each other in the form of blocks, thereby eliminating the necessity to effect tracking adjustment.Type: GrantFiled: August 6, 1986Date of Patent: May 3, 1988Assignees: Toko, Inc., Matsushita Electrical Industrial Co., Ltd.Inventors: Hajime Yokoyama, Noboru Takada, Yusuke Okamoto, Makoto Torakawa, Takashi Ikegame