Patents by Inventor Akihiro Okubo
Akihiro Okubo 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: 11933291Abstract: A compressor, a monitoring system and a method of monitoring a compressor that make it possible to monitor the remaining lifetime of a semiconductor element of a motor control system while the processing load is reduced are provided. A compressor (1) includes: a motor control system (10) that controls the rotation speed of a motor (2); a compressor body (3) that compresses air by being driven by the motor (2); a pressure sensor (20) that is provided on the discharge side of the compressor body (3); and a running controller (11) that performs switching between load running and no-load running on the basis of the pressure sensed by the pressure sensor (20).Type: GrantFiled: July 28, 2020Date of Patent: March 19, 2024Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Tomofumi Okubo, Norinaga Suzuki, Kiyomi Tashima, Akihiro Takanuki
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Patent number: 10151393Abstract: A metal gasket material plate includes a sealing layer formed by layering a chemical coating layer, an adhesive layer, and a rubber coating layer in this order on at least one side of a metal plate. The chemical coating layer is formed by a thermosetting surface preparation agent including inorganic compound particles and a metal alkoxide compound. The adhesive layer is formed by an adhesive including an epoxy compound and an anti-corrosive pigment. The rubber coating layer is formed by a rubber agent including rubber.Type: GrantFiled: March 11, 2016Date of Patent: December 11, 2018Assignees: NIPPON LEAKLESS INDUSTRY CO., LTD., HONDA MOTOR CO., LTD.Inventors: Satoshi Ota, Naomichi Mitsuyama, Yosuke Yoshizawa, Yuji Mitsumori, Kenji Sasaki, Masayuki Nakamura, Akihiro Okubo, Akira Masukura, Noriyuki Kitagawa
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Patent number: 10080995Abstract: A membrane support material is support material for adhering a membrane to a membrane attachment surface. A plurality of non-woven fiber sheets, which are three-dimensional fiber aggregates, are layered together and thermal and pressure processed to bond fibers of the non-woven fiber sheets and form a single sheet of support material. Each layer of non-woven fiber sheet has a different longitudinal-to-lateral tensile strength ratio (k), which is the ratio (f2/f1) of the tensile strength in the lengthwise direction (f2) to the tensile strength in the width direction (f1), and in the thermal and pressure processed state, the support material membrane attachment surface has curvature in the lateral (width) direction with an outward protruding (convex) center region.Type: GrantFiled: December 23, 2011Date of Patent: September 25, 2018Assignee: AWA PAPER MFG. CO., LTD.Inventors: Katsumi Osaka, Akihiro Okubo, Daisuke Fujieda
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Publication number: 20160265661Abstract: A metal gasket material plate includes a sealing layer formed by layering a chemical coating layer, an adhesive layer, and a rubber coating layer in this order on at least one side of a metal plate. The chemical coating layer is formed by a thermosetting surface preparation agent including inorganic compound particles and a metal alkoxide compound. The adhesive layer is formed by an adhesive including an epoxy compound and an anti-corrosive pigment. The rubber coating layer is formed by a rubber agent including rubber.Type: ApplicationFiled: March 11, 2016Publication date: September 15, 2016Applicants: NIPPON LEAKLESS INDUSTRY CO., LTD., HONDA MOTOR CO., LTD.Inventors: Satoshi OTA, Naomichi MITSUYAMA, Yosuke YOSHIZAWA, Yuji MITSUMORI, Kenji SASAKI, Masayuki NAKAMURA, Akihiro OKUBO, Akira MASUKURA, Noriyuki KITAGAWA
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Publication number: 20130295339Abstract: The membrane support material is support material for adhering a membrane to a membrane attachment surface. A plurality of non-woven fiber sheets, which are three-dimensional fiber aggregates, are layered together and thermal and pressure processed to bond fibers of the non-woven fiber sheets and form a single sheet of support material. Each layer of non-woven fiber sheet 1 has a different longitudinal-to-lateral tensile strength ratio (k), which is the ratio (f2/f1) of the tensile strength in the lengthwise direction (f2) to the tensile strength in the width direction (f1), and in the thermal and pressure processed state, the support material membrane attachment surface has curvature in the lateral (width) direction with an outward protruding (convex) center region.Type: ApplicationFiled: December 23, 2011Publication date: November 7, 2013Inventors: Katsumi Osaka, Akihiro Okubo, Daisuke Fujieda
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Patent number: 7267876Abstract: The resin-coated sand is produced by coating the surface of a refractory granular aggregate with a thermosetting resin and a thermoplastic resin. When using this resin-coated sand, a mold with a less rough surface can be produced by a RP molding apparatus. When using this mold made of the resin-coated sand, a casting with fewer gas defects can be produced.Type: GrantFiled: March 31, 2004Date of Patent: September 11, 2007Assignee: Gun Ei Chemical Industry Co., Ltd.Inventors: Akihiro Okubo, Tatsunosuke Murakami, Fumitoshi Takeuchi, Koki Shiduka
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Publication number: 20060284346Abstract: The resin-coated sand is produced by coating the surface of a refractory granular aggregate with a thermosetting resin and a thermoplastic resin. When using this resin-coated sand, a mold with a less rough surface can be produced by a RP molding apparatus. When using this mold made of the resin-coated sand, a casting with fewer gas defects can be produced.Type: ApplicationFiled: August 11, 2006Publication date: December 21, 2006Applicant: GUN EI CHEMICAL INDUSTRY CO., LTD.Inventors: Akihiro Okubo, Tatsunosuke Murakami, Fumitoshi Takeuchi, Koki Shiduka
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Patent number: 7071130Abstract: Segregating membrane supporting material is a three-dimensional assembly of fibers thermo-compressed into non-woven fabric, and the non-woven fabric fibers are joined together in sheet form. This segregating membrane supporting material is non-woven fabric, including at least 10 weight % polyacrylonitrile-based synthetic fibers, which is thermo-compressed to give an overall bulk density 40% to 75% of the density of the fibers which make up the non-woven fabric.Type: GrantFiled: July 21, 2003Date of Patent: July 4, 2006Assignees: Awa Paper Mfg. Co., Ltd., Japan Exlan Company LimitedInventors: Yoshitsugu Hama, Hideo Naka, Yoshifumi Kusaka, Akihiro Okubo
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Publication number: 20050176330Abstract: Segregating membrane supporting material is a three-dimensional assembly of fibers thermo-compressed into non-woven fabric, and the non-woven fabric fibers are joined together in sheet form. This segregating membrane supporting material is non-woven fabric, including at least 10 weight % polyacrylonitrile-based synthetic fibers, which is thermo-compressed to give an overall bulk density 40% to 75% of the density of the fibers which make up the non-woven fabric.Type: ApplicationFiled: July 21, 2003Publication date: August 11, 2005Inventors: Yoshitsugu Hama, Hideo Naka, Yoshifumi Kusaka, Akihiro Okubo
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Patent number: 6919026Abstract: A semipermeable membrane support includes, a non-woven fabric including main fiber and binder fiber, both of which are formed of synthetic resin fine fiber, the non-woven fabric being manufactured by heating and pressing after paper making, wherein the semipermeable membrane support has a ratio of a tensile strength in a paper feeding direction to that in a width direction of 2:1 to 1:1.Type: GrantFiled: September 20, 2001Date of Patent: July 19, 2005Assignees: Awa Paper Mfg. Co., Ltd., Nitto Denko CorporationInventors: Yoshitsugu Hama, Yoshifumi Kusaka, Akihiro Okubo
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Publication number: 20040197558Abstract: The resin-coated sand is produced by coating the surface of a refractory granular aggregate with a thermosetting resin and a thermoplastic resin. When using this resin-coated sand, a mold with a less rough surface can be produced by a RP molding apparatus. When using this mold made of the resin-coated sand, a casting with fewer gas defects can be produced.Type: ApplicationFiled: March 31, 2004Publication date: October 7, 2004Applicant: Gun Ei Chemical Industry Co., Ltd.Inventors: Akihiro Okubo, Tatsunosuke Murakami, Fumitoshi Takeuchi, Koki Shiduka
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Publication number: 20020056535Abstract: A semipermeable membrane support includes, a non-woven fabric including main fiber and binder fiber, both of which are formed of synthetic resin fine fiber, the non-woven fabric being manufactured by heating and pressing after paper making, wherein the semipermeable membrane support has a ratio of a tensile strength in a paper feeding direction to that in a width direction of 2:1 to 1:1.Type: ApplicationFiled: September 20, 2001Publication date: May 16, 2002Inventors: Yoshitsugu Hama, Yoshifumi Kusaka, Akihiro Okubo
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Patent number: 5685825Abstract: An endoscope comprising a flexible tubular body characterized in that a coating layer of aliphatic resins is formed on at least one surface of the outermost layer portion of the flexible tubular body. The coating layer of aliphatic resins is formed by applying a coating agent containing an aliphatic prepolymer on the surface, followed by curing.Type: GrantFiled: December 21, 1995Date of Patent: November 11, 1997Assignee: Olympus Optical Co., Ltd.Inventors: Seisuke Takase, Tetsuaki Mori, Akihiro Okubo, Yasushi Machida
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Patent number: 5428284Abstract: A driving control circuit of a sensorless motor having a stator and a rotor, used for a magnetic disk device, comprising a high-frequency stepping oscillator, stepping oscillator, a timer, a stepping timing generating circuit, a current switching logic, an output driver, and a counter electromotive force detecting circuit, wherein three-phase driving coils are connected to an output driver. For starting, a high frequency stepping step a holding step where current flow conditions are held without switching currents to the driving coils, are executed; then, currents to the driving coils are inverted to obtain a reversed excited condition; and, after performing a stepping step for starting the motor is controlled at a steady rotating speed by detecting counter electromotive forces.Type: GrantFiled: July 13, 1994Date of Patent: June 27, 1995Assignee: Nippon Densan CorporationInventors: Isao Kaneda, Kouhei Yonemura, Akihiro Okubo
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Patent number: 5407950Abstract: Arylalkanoylamine derivatives having excellent prolyl endopeptidase inhibitory action and resistances to hypoxia and amnesia which are represented by the following general formula (I): ##STR1## wherein A represents an indanyl, indenyl, 1,2,3,4-tetrahydronaphthalenyl or benzofuranyl group; m represents an integer of 0 to 5; Z represents a hydroxymethyl, formyl, nitrile, hydroxyiminomethyl, semicarbazonomethyl or dialkoxymethyl group; X and Y may be the same or different, and individually represent a methylene group or sulfur atom, wherein compounds defined by the following substituents are excluded: A represents an indanyl, indenyl, or 1,2,3,4-tetrahydronaphthalenyl group; X and Y each represent a methylene group; and Z represents a hydroxymethyl or formyl group. Also disclosed is a pharmaceutical composition and method for improving mneme, cerebral circulation and cerebral metabolism comprising the arylalkanoylamine derivatives as the effective ingredient.Type: GrantFiled: December 7, 1992Date of Patent: April 18, 1995Assignee: Zeria Pharmaceutical Co., Ltd.Inventors: Akihiro Okubo, Hiroyasu Nishioka, Heihachiro Arai, Yoshiaki Tanaka, Hisayoshi Kato, Naoki Nakata
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Patent number: 5235264Abstract: A driving control circuit of a motor having a sensorless stator and a rotor, used for a magnetic disk device, comprising a high-frequency stepping oscillator, stepping oscillator, a timer, a stepping timing generating circuit, a current switching logic, an output driver, and a counter electromotive force detecting circuit, wherein three-phase driving coils are connected to an output driver. For starting, a holding step where current flow conditions are held without switching currents to the driving coils, are executed; then, currents to the driving coils are inverted to obtain a reversed excited condition, and, after performing a stepping step for starting, the motor is controlled at a steady rotating speed by detecting counter electromotive forces.Type: GrantFiled: June 28, 1991Date of Patent: August 10, 1993Assignee: Nippon Densan CorporationInventors: Isao Kaneda, Kouhei Yonemura, Akihiro Okubo
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Patent number: 5198450Abstract: An agent for treating or preventing cerebral circulation disorder, cerebral metabolism disorder, or memory disturbance is disclosed. The agent comprises as an effective component a phenylalkanoylamine derivative represented by the following formula (I), ##STR1## wherein A represents a 1,3-thiazolidin-3-yl group, a 1,2,3,6-tetrahydropyridin-1-yl group, a morpholino group, a thiomorpholin-4-yl group, or a 3-pyrrolin-1-yl group, R.sup.1 and R.sup.2, which may be the same or different, represent a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, a nitro group, an amino group, a guanidino group, or a group ##STR2## (wherein R.sup.3 and R.sup.4 independently represent a lower alkyl group or form in combination 5- or 6-membered heterocyclic group), and n represents an integer of 2-6, or a salt thereof.Type: GrantFiled: January 7, 1991Date of Patent: March 30, 1993Assignee: Zeria Pharmaceutical Co., Ltd.Inventors: Kuniyoshi Ogura, Tomoji Aotsuka, Motoki Torizuka, Mitsuo Soeda, Yoshiaki Tanaka, Hisayoshi Kato, Naoyoshi Miura, Noaki Nakata, Hikaru Morita, Akihiro Okubo