Patents by Inventor Ken Hirota
Ken Hirota 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: 20240065992Abstract: An aortic aneurysm has few noticeable symptoms and is at high risk of rupture without a sign of abnormality. Further, if the aortic aneurysm ruptures, it causes a shock state due to massive blood loss and results in a very low survival rate. Thus, when the aortic aneurysm is found by physical examination or the like, surgery with a stent graft or the like needs to be performed according to the state of its progression. A pharmaceutical composition for preventing and treating an aortic aneurysm including a medium chain fatty acid as a main component has an effect of inhibiting the occurrence and progression of the aortic aneurysm. Thus, when the aortic aneurysm is found, continuous intake of the composition can not only inhibit the progression of the aortic aneurysm but also mediate the regression of the aortic aneurysm, thereby producing the effect of improving vital prognosis.Type: ApplicationFiled: December 10, 2021Publication date: February 29, 2024Applicants: KINKI UNIVERSITY, YASHIRO CO., LTD., OSAKA UNIVERSITYInventors: Nobuhiro ZAIMA, Hirona KUGO, Motohiro KITANO, Yoshinori HIROTA, Ken-ichi HIRANO
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Patent number: 11056258Abstract: A production method for a magnetic material, which is expressed by a chemical structure formula Fe(Al1-xMnx)2O4, where 0<x<1, and exhibits ferromagnetism, includes: preparing a mixed aqueous solution by dissolving, in distilled water, Fe nitrate, Al nitrate, and an oxide including Mn, the Fe nitrate, the Al nitrate, and the oxide being parent materials; preparing a metal-citric acid complex by mixing citric acid and ethylene glycol with the mixed aqueous solution; obtaining a precursor by boiling the metal-citric acid complex to a gel and drying the gel; and obtaining the magnetic material by sintering the precursor.Type: GrantFiled: January 28, 2016Date of Patent: July 6, 2021Assignees: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., THE DOSHISHAInventors: Ken Hirota, Masaki Kato, Junichi Kotani, Nobuya Matsutani
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Publication number: 20190241173Abstract: The disclosure includes a steering angle detection part detecting a steering angle of a handle for steering a front wheel of a vehicle, wherein the vehicle includes drive wheels, which are left and right rear wheels respectively provided with drive motors, and a steering wheel, which is the front wheel; a steering angle determination part determining whether the steering angle exceeds a predetermined steering angle reference value; and a motor control part reducing an output supplied to the drive motors of the rear wheels corresponding to a direction of the steering angle in a case that the steering angle determination part determines that the steering angle exceeds the steering angle reference value.Type: ApplicationFiled: December 19, 2018Publication date: August 8, 2019Applicant: MITSUBA CorporationInventors: TAKU SUZUKI, YOSHIKATSU HOSOYA, RYOTA HASHIMOTO, KEN HIROTA, TOMOKAZU AKUTSU
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Patent number: 10128720Abstract: This electric motor includes: a brushless motor (20); and a control device (50) that is coupled integrally to an end of a motor case (11) in an axial direction. The control device (50) includes: a bus bar unit main body (53) that has a base unit (54) with a plurality of bus bars wired thereinside and has a connector unit (58) provided integrally on the base unit (54) and led out to an outside of a housing (10); a motor drive unit (66) that drives the brushless motor (20); and a motor control unit (71) that controls the motor drive unit (66). The motor drive unit (66) is attached to a first main surface (51) of the base unit (54) while the motor control unit (71) is attached to a second main surface (52) of the base unit (54).Type: GrantFiled: December 25, 2013Date of Patent: November 13, 2018Assignee: Mitsuba CorporationInventors: Masaki Ishizeki, Yoichi Shindo, Shinji Shibuya, Ken Hirota, Atsushi Takahashi, Yuzuru Masuyama, Tomoo Iijima, Ken Yamamoto, Nobuyasu Sadakata, Shigeyuki Enkaku
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Patent number: 9902654Abstract: A ZrO2—Al2O3-based ceramic sintered compact containing tetragonal ZrO2 particles having a crystallite size of from 5 to 20 nm as a main component and having an ?-Al2O3 crystallite size of not greater than 75 nm and a relative density of not less than 99% can be produced by preparing a Y2O3 partially stabilized ZrO2—Al2O3-based powder having a molar ratio (mol %) of zirconia (ZrO2) and yttria (Y2O3) of from 96.5:3.5 to 97.5:2.5 and a mass ratio (mass %) of ZrO2 containing Y2O3 and alumina (Al2O3) of from 85:15 to 75:25, molding this powder by cold isostatic pressing, and then performing sintering to a high density by microwave sintering for 45 to 90 min in an inert gas atmosphere at 1200 to 1400° C. When performing microwave sintering, a heating rate is preferably from 5 to 20° C./min up to 600° C. and from 50 to 150° C./min at 600° C. or higher.Type: GrantFiled: December 23, 2016Date of Patent: February 27, 2018Assignees: THE DOSHISHA, DAIICHI KIGENSO KAGAKU KOGYO CO., LTD.Inventors: Ken Hirota, Xiaoteng Ge, Hideo Kimura
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Publication number: 20180033531Abstract: A production method for a magnetic material, which is expressed by a chemical structure formula Fe(Al1?xMnx)2O4, where 0<x<1, and exhibits ferromagnetism, includes: preparing a mixed aqueous solution by dissolving, in distilled water, Fe nitrate, Al nitrate, and an oxide including Mn, the Fe nitrate, the Al nitrate, and the oxide being parent materials; preparing a metal-citric acid complex by mixing citric acid and ethylene glycol with the mixed aqueous solution; obtaining a precursor by boiling the metal-citric acid complex to a gel and drying the gel; and obtaining the magnetic material by sintering the precursor.Type: ApplicationFiled: January 28, 2016Publication date: February 1, 2018Inventors: Ken HIROTA, Masaki KATO, Junichi KOTANI, Nobuya MATSUTANI
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Publication number: 20170362129Abstract: A ZrO2—Al2O3-based ceramic sintered compact containing tetragonal ZrO2 particles having a crystallite size of from 5 to 20 nm as a main component and having an ?-Al2O3 crystallite size of not greater than 75 nm and a relative density of not less than 99% can be produced by preparing a Y2O3 partially stabilized ZrO2—Al2O3-based powder having a molar ratio (mol %) of zirconia (ZrO2) and yttria (Y2O3) of from 96.5:3.5 to 97.5:2.5 and a mass ratio (mass %) of ZrO2 containing Y2O3 and alumina (Al2O3) of from 85:15 to 75:25, molding this powder by cold isostatic pressing, and then performing sintering to a high density by microwave sintering for 45 to 90 min in an inert gas atmosphere at 1200 to 1400° C. When performing microwave sintering, a heating rate is preferably from 5 to 20° C./min up to 600° C. and from 50 to 150° C./min at 600° C. or higher.Type: ApplicationFiled: December 23, 2016Publication date: December 21, 2017Applicants: THE DOSHISHA, DAIICHI KIGENSO KAGAKU KOGYO CO., LTD.Inventors: Ken Hirota, Xiaoteng Ge, Hideo Kimura
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Publication number: 20150357886Abstract: This electric motor includes: a brushless motor (20); and a control device (50) that is coupled integrally to an end of a motor case (11) in an axial direction. The control device (50) includes: a bus bar unit main body (53) that has a base unit (54) with a plurality of bus bars wired thereinside and has a connector unit (58) provided integrally on the base unit (54) and led out to an outside of a housing (10); a motor drive unit (66) that drives the brushless motor (20); and a motor control unit (71) that controls the motor drive unit (66). The motor drive unit (66) is attached to a first main surface (51) of the base unit (54) while the motor control unit (71) is attached to a second main surface (52) of the base unit (54).Type: ApplicationFiled: December 25, 2013Publication date: December 10, 2015Applicant: MITSUBA CorporationInventors: Masaki Ishizeki, Yoichi Shindo, Shinji Shibuya, Ken Hirota, Atsushi Takahashi, Yuzuru Masuyama, Tomoo Iijima, Ken Yamamoto, Nobuyasu Sadakata, Shigeyuki Enkaku
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Patent number: 7893000Abstract: Boron carbide ceramics produced by spark sintering methods have more desirable mechanical properties than conventionally produced carbides. The boron carbide ceramics include amorphous boron, amorphous carbon, and Al2O3 powder as a sintering aid. The boron carbides may also contain a carbon nano fiber in a nearly homogeneously dispersed state. The sintered compact has a relative density of a boron carbide ceramic of approximately not less than 99%. The boron carbide ceramics are prepared preferably by subjecting a mixed powder of the starting raw materials and the carbon nano fiber to simultaneous synthesis and sintering using the spark plasma sintering method.Type: GrantFiled: August 16, 2010Date of Patent: February 22, 2011Assignee: The DoshishaInventors: Ken Hirota, Yoshihiro Nakayama, Shingo Nakane
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Publication number: 20100311561Abstract: Boron carbide ceramics produced by spark sintering methods have more desirable mechanical properties than conventionally produced carbides. The boron carbide ceramics include amorphous boron, amorphous carbon, and Al2O3 powder as a sintering aid. The boron carbides may also contain a carbon nano fiber in a nearly homogeneously dispersed state. The sintered compact has a relative density of a boron carbide ceramic of approximately not less than 99%.Type: ApplicationFiled: August 16, 2010Publication date: December 9, 2010Inventors: Ken HIROTA, Yoshihiro Nakayama, Shingo Nakane
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Patent number: 7799715Abstract: Boron carbide ceramics produced by spark sintering methods have more desirable mechanical properties than conventionally produced carbides. The boron carbide ceramics include amorphous boron, amorphous carbon, and Al2O3 powder as a sintering aid. The boron carbides may also contain a carbon nano fiber in a nearly homogeneously dispersed state. The sintered compact has a relative density of a boron carbide ceramic of approximately not less than 99%. The boron carbide ceramics are prepared preferably by subjecting a mixed powder of the starting raw materials and the carbon nano fiber to simultaneous synthesis and sintering using the spark plasma sintering method.Type: GrantFiled: September 12, 2008Date of Patent: September 21, 2010Assignee: The DoshishaInventors: Ken Hirota, Yoshihiro Nakayama, Shingo Nakane
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Publication number: 20090082191Abstract: Boron carbide ceramics produced by spark sintering methods have more desirable mechanical properties than conventionally produced carbides. The boron carbide ceramics include amorphous boron, amorphous carbon, and Al2O3 powder as a sintering aid. The boron carbides may also contain a carbon nano fiber in a nearly homogeneously dispersed state. The sintered compact has a relative density of a boron carbide ceramic of approximately not less than 99%. The boron carbide ceramics are prepared preferably by subjecting a mixed powder of the starting raw materials and the carbon nano fiber to simultaneous synthesis and sintering using the spark plasma sintering method.Type: ApplicationFiled: September 12, 2008Publication date: March 26, 2009Inventors: Ken Hirota, Yoshihiro Nakayama, Shingo Nakane
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Patent number: 5352522Abstract: A composite material is provided which includes a discrete phase including grains made of a first substance; and a continuous phase including a thin coating film made of a second substance and formed on the surface of each of the grains. The thin coating film has a mean thickness smaller than the mean particle size of the grains. The grains are separated substantially from each other by the thin coating film. The porosity of the composite material is 5% or less.Type: GrantFiled: September 16, 1992Date of Patent: October 4, 1994Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koichi Kugimiya, Yasuhiro Sugaya, Osamu Inoue, Mitsuo Satomi, Ken Hirota
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Patent number: 5350628Abstract: A magnetic material is provided which includes a discrete phase including grains made of a first substance which comprises a magnetic metal; and a continuous phase including a thin coating film made of a second substance which comprises a dielectric or insulating substance. The thin coating film is formed on the surface of the grains and has a mean thickness smaller than the mean particle size of the grains. The grains are separated substantially from each other by the thin coating film.Type: GrantFiled: November 19, 1992Date of Patent: September 27, 1994Assignee: Matsushita Electric Industrial Company, Inc.Inventors: Koichi Kugimiya, Yasuhiro Sugaya, Osamu Inoue, Ken Hirota, Mitsuo Satomi
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Patent number: 5238507Abstract: A magnetic material is provided which includes a discrete phase including grains made of a first substance which comprises a magnetic metal; and a continuous phase including a thin coating film made of a second substance which comprises a dielectric or insulating substance. The thin coating film is formed on the surface of the grains and has a mean thickness smaller than the mean particle size of the grains. The grains are separated substantially from each other by the thin coating film.Type: GrantFiled: June 8, 1990Date of Patent: August 24, 1993Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koichi Kugimiya, Yasuhiro Sugaya, Osamu Inoue, Ken Hirota, Mitsuo Satomi
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Patent number: 5217818Abstract: A substrate material for a magnetic head, which comprises an oxide composed mainly of WO.sub.3 and has a thermal expansion coefficient of 100 to 130.times.10.sup.-7 /.degree. C., and a magnetic head using the substrate material.Type: GrantFiled: March 15, 1990Date of Patent: June 8, 1993Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Mitsuo Satomi, Ken Hirota, Koichi Kugimiya
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Patent number: 5183631Abstract: A composite material is provided which includes a discrete phase including grains made of a first substance; and a continuous phase including a thin coating film made of a second substance and formed on the surface of each of the grains. The thin coating film has a mean thickness smaller than the mean particle size of the grains. The grains are separated substantially from each other by the thin coating film. The porosity of the composite material is 5% or less.Type: GrantFiled: June 8, 1990Date of Patent: February 2, 1993Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koichi Kugimiya, Yasuhiro Sugaya, Osamu Inoue, Mitsuo Satomi, Ken Hirota
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Patent number: 5164264Abstract: A substrate made of a composite material is provided which includes a discrete phase including grains made of a first substance; and a continuous phase including a thin coating film made of a second substance and formed on the surface of the grains. The thin coating film has a mean thickness smaller than the mean particle size of the grains. The grains are separated substantially from each other by the thin coating film. The porosity of the composite material is 5% or less.Type: GrantFiled: June 8, 1990Date of Patent: November 17, 1992Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koichi Kugimiya, Ken Hirota, Mitsuo Satomi
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Patent number: 5104739Abstract: A laminated magnetic material suitable for use as a material of a magnetic core has a plurality of layers of an Fe-Si-Al type magnetic metal and a plurality of electrically insulating layers both of which layers are laminated alternatingly, the magnetic metal containing 0.001 to 0.3 wt % of oxygen. The laminated magnetic material can be produced by forming, on a base film, a film made of a magnetic powder of an Fe-Si-Al type metal containing 0.001 to 0.3 wt % of oxygen, separating the film of the magnetic powder from the base film, laminating the separated film of magnetic powder so as to form a laminated structure, and extruding the laminated structure.Type: GrantFiled: October 24, 1989Date of Patent: April 14, 1992Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Ken Hirota, Mitsuo Satomi, Koichi Kugimiya
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Patent number: 5073214Abstract: A magnetic material having an Fe-Si-Al type magnetic alloy with addition of one or more additive elements selected from a group consisting of Be, Mg, Ca, Sr, Ba, Sc, Y, Nb, Ta and Hf. The material has been subjected to an oxidation heat-treatment so as to contain a predetermined amount of oxygen.Type: GrantFiled: October 20, 1989Date of Patent: December 17, 1991Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Ken Hirota, Mitsuo Satomi, Koichi Kugimiya