Patents by Inventor Shinpei Yamamoto
Shinpei Yamamoto 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: 20230299472Abstract: Disclosed is a radome 1 for vehicle-mounted radar devices including a base body 2 having an electromagnetic wave permeable substrate 3 and a heater wire 41 laminated on an inner surface side of the substrate 3 and wired in a surface direction of the substrate 3, in which linear portions 411 of the heater wire 41 are arranged side by side at intervals in the surface direction of the substrate 3 in an electromagnetic wave irradiation region R of the substrate 3, and a surface occupancy ratio of the linear portions 411 of the heater wire 41 in the electromagnetic wave irradiation region R of the substrate 3 is set to 1% or more and 24% or less. It is possible to exhibit a practical snow-melting function as a radome for vehicle-mounted radar devices while suppressing attenuation of electromagnetic waves irradiated by a vehicle-mounted radar device within an allowable range.Type: ApplicationFiled: June 23, 2021Publication date: September 21, 2023Applicant: SANKEI GIKEN KOGYO CO., LTD.Inventors: Takamasa Enomoto, Hiroyuki Kobayashi, Ryuho Ikemasu, Shinpei Yamamoto
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Publication number: 20230291089Abstract: Disclosed is a radome structure for vehicle-mounted radar devices, in which a planar heating element 2 is laminated and fixed onto a substrate 1 of the radome, a local recess 3 is provided so as to protrude from the substrate 1, a connecting body 4 for electrically connecting an electrode of a heater wire 21 of the planar heating element 2 to a power supply line 5 to the planar heating element 2 is accommodated in the recess 3, and the recess 3 is filled with an insulating resin 6 so as to embed and seal the connecting body 4. It is possible to simplify a connection structure and a waterproof structure of a connecting portion for electrically connecting the heater wire and the power supply line of the radome, and reduce the manufacturing cost of the radome structure having a snow melting function.Type: ApplicationFiled: July 21, 2021Publication date: September 14, 2023Applicant: SANKEI GIKEN KOGYO CO., LTD.Inventors: Hiroyuki Kobayashi, Ryuho Ikemasu, Shinpei Yamamoto, Hisashi Hamachi
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Patent number: 11732336Abstract: Provided are: a novel magnetic material having high magnetic stability, in particular, having an extremely high saturation magnetization; and a method for producing the same, wherein the magnetic material, due to having a higher saturation magnetization than ferrite magnetic materials and a higher electrical resistivity than existing metallic magnetic materials, resolves problems such as eddy current loss. According to the present invention, Co-ferrite nanoparticles obtained by wet synthesis are reduced in hydrogen and subjected to grain growth, and bcc- or fcc-(Fe, Co) phases and Co-enriched phases are nano-dispersed using phase separation via a disproportionation reaction to prepare a magnetic material powder. In addition, the magnetic material powder is sintered into a solid magnetic material.Type: GrantFiled: September 20, 2018Date of Patent: August 22, 2023Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Shinpei Yamamoto, Nobuyoshi Imaoka, Kimihiro Ozaki
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Patent number: 11459646Abstract: The purpose of the present invention is to provide: a new magnetic material which exhibits high magnetic stability and excellent oxidation resistance and which can achieve both significantly higher saturation magnetization and lower coercive force than a conventional ferrite-based magnetic material by using a magnetic material obtained by nanodispersing ?-(Fe,M) phases and M component-enriched phases (here, the M component is at least one component selected from among Zr, Hf, V, Nb, Ta, Cr, Mo, W, Cu, Zn and Si); and a method for producing same. This magnetic material powder exhibits high moldability, and is such that ?-(Fe, M) phases and M-enriched phases are nanodispersed by chemically reducing M-ferrite nanoparticles, which are obtained by means of wet synthesis, in hydrogen and utilizing phase separation by means of a disproportionation reaction while simultaneously carrying out grain growth. Furthermore, a solid magnetic material is obtained by sintering this powder.Type: GrantFiled: September 20, 2018Date of Patent: October 4, 2022Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Nobuyoshi Imaoka, Shinpei Yamamoto, Kimihiro Ozaki
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Publication number: 20220163632Abstract: A radome for on-board radar devices 1 is provided with heater wires 3 wired in parallel so as to be separated from each other in a plane direction of an electromagnetic-wave-transmitting base member. A line pitch d of the heater wires 3 arranged in parallel in an electromagnetic-wave transmission region R of the base member is set to 0.2 to 2.5 times a wavelength of electromagnetic waves of the radar of an on-board radar device. A surface occupancy rate of the heater wires 3 arranged in parallel in the electromagnetic-wave transmission region R of the base member is set to be greater than 10% to 35%. The present invention provides a radome for on-board radar devices with which it is possible to obtain an electromagnetic-wave transmission property required of a radome, and to melt snow satisfactorily with a high heater performance.Type: ApplicationFiled: February 7, 2020Publication date: May 26, 2022Applicant: SANKEI GIKEN KOGYO CO., LTD.Inventors: Hiroyuki Kobayashi, Shinpei Yamamoto, Makoto Takakusaki, Ryuho Ikemasu
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Patent number: 11331721Abstract: Provided are a new, highly magnetically stable magnetic material which has higher saturation magnetization than ferrite-based magnetic materials, and with which problems of eddy current loss and the like can be solved due to higher electric resistivity than that of existing metal-based magnetic materials, and a method for manufacturing the same. A magnetic material powder is obtained by reducing in hydrogen Ni-ferrite nanoparticies obtained by wet synthesis and causing grain growth, while simultaneously causing nanodispersion of an ?-(Fe, Ni) phase and an Ni-enriched phase by means of a phase dissociation phenomenon due to disproportional reaction. The powder is sintered to obtain a solid magnetic material.Type: GrantFiled: February 23, 2018Date of Patent: May 17, 2022Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Shinpei Yamamoto, Nobuyoshi Imaoka, Kimihiro Ozaki
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Publication number: 20200265976Abstract: Provided are: a novel magnetic material having high magnetic stability, in particular, having an extremely high saturation magnetization; and a method for producing the same, wherein the magnetic material, due to having a higher saturation magnetization than ferrite magnetic materials and a higher electrical resistivity than existing metallic magnetic materials, resolves problems such as eddy current loss. According to the present invention, Co-ferrite nanoparticles obtained by wet synthesis are reduced in hydrogen and subjected to grain growth, and bcc- or fcc-(Fe, Co) phases and Co-enriched phases are nano-dispersed using phase separation via a disproportionation reaction to prepare a magnetic material powder. In addition, the magnetic material powder is sintered into a solid magnetic material.Type: ApplicationFiled: September 20, 2018Publication date: August 20, 2020Applicant: National Institute of Advanced Industrial Science and TechnologyInventors: Shinpei Yamamoto, Nobuyoshi Imaoka, Kimihiro Ozaki
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Publication number: 20200248288Abstract: The purpose of the present invention is to provide: a new magnetic material which exhibits high magnetic stability and excellent oxidation resistance and which can achieve both significantly higher saturation magnetization and lower coercive force than a conventional ferrite-based magnetic material by using a magnetic material obtained by nanodispersing ?-(Fe,M) phases and M component-enriched phases (here, the M component is at least one component selected from among Zr, Hf, V, Nb, Ta, Cr, Mo, W, Cu, Zn and Si); and a method for producing same. This magnetic material powder exhibits high moldability, and is such that ?-(Fe, M) phases and M-enriched phases are nanodispersed by chemically reducing M-ferrite nanoparticles, which are obtained by means of wet synthesis, in hydrogen and utilizing phase separation by means of a disproportionation reaction while simultaneously carrying out grain growth. Furthermore, a solid magnetic material is obtained by sintering this powder.Type: ApplicationFiled: September 20, 2018Publication date: August 6, 2020Applicant: National Institute of Advanced Industrial Science and TechnologyInventors: Nobuyoshi Imaoka, Shinpei Yamamoto, Kimihiro Ozaki
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Publication number: 20190375004Abstract: Provided are a new, highly magnetically stable magnetic material which has higher saturation magnetization than ferrite-based magnetic materials, and with which problems of eddy current loss and the like can be solved due to higher electric resistivity than that of existing metal-based magnetic materials, and a method for manufacturing the same. A magnetic material powder is obtained by reducing in hydrogen Ni-ferrite nanoparticies obtained by wet synthesis and causing grain growth, while simultaneously causing nanodispersion of an ?-(Fe, Ni) phase and an Ni-enriched phase by means of a phase dissociation phenomenon due to disproportional reaction. The powder is sintered to obtain a solid magnetic material.Type: ApplicationFiled: February 23, 2018Publication date: December 12, 2019Applicant: National Institute of Advanced Industrial Science and TechnologyInventors: Shinpei YAMAMOTO, Nobuyoshi IMAOKA, Kimihiro OZAKI
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Publication number: 20180363746Abstract: A ball recirculation tube (4) forms a passage connecting two separated portions of a ball-rolling passage of a ball screw device (1) to cause balls (6) to recirculate. An outer portion (4a, 4b) of the ball recirculation tube (4) that constitutes an outer end located radially farthest from the center axis of a screw shaft (2) has an adjustable portion used to adjust the distance from the center axis of the screw shaft (2) to the outer end. This facilitates attachment of a member fitted on a nut and the ball recirculation tube (4).Type: ApplicationFiled: February 10, 2016Publication date: December 20, 2018Inventors: Shinpei YAMAMOTO, Shigeharu KOBAYASHI
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Publication number: 20180172139Abstract: An object is to reduce the load on a driving device for turning a screw shaft (2) in a cooling liquid discharge apparatus (10) for use in a ball screw apparatus (100) used in a machine tool or the like to make the apparatus compact and to prevent an increase in the manufacturing cost. The cooling liquid discharge apparatus (10) according to the invention has a housing (14) that is provided with proximity portions (5d, 6f) that extend radially inwardly to be close to the screw shaft 2 and reservoirs (11, 12, 13) that temporally store cooling liquid (8), which are arranged alternately along the axial direction, and discharge ports (5e, 6e, 6g) through which cooling liquid (8) is discharged from the reservoirs (11, 12, 13).Type: ApplicationFiled: June 17, 2016Publication date: June 21, 2018Inventors: Shinpei YAMAMOTO, Seiji SUZUKI
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Publication number: 20140294657Abstract: The present invention provides ferromagnetic iron nitride particles, in particular, in the form of fine particles, and a process for producing the ferromagnetic iron nitride particles. The present invention relates to a process for producing ferromagnetic iron nitride particles, comprising the steps of mixing metallic iron obtained by mixing at least one compound selected from the group consisting of a metal hydride, a metal halide and a metal borohydride with an iron compound, and then subjecting the obtained mixture to heat treatment, with a nitrogen-containing compound; and then subjecting the resulting mixture to heat treatment, in which a reduction step and a nitridation step of the iron compound are conducted in the same step, and the at least one compound selected from the group consisting of a metal hydride, a metal halide and a metal borohydride is used as a reducing agent in the reduction step, whereas the nitrogen-containing compound is used as a nitrogen source in the nitridation step.Type: ApplicationFiled: September 20, 2012Publication date: October 2, 2014Inventors: Shinpei Yamamoto, Mikio Takano, Migaku Takahashi, Tomoyuki Ogawa, Naoya Kobayashi
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Publication number: 20100215851Abstract: A method of producing core/shell composite nano-particles exhibiting superior characteristics, by using as cores nano-particles heat treated in advance so as to give them a specific crystal structure in a state using a barrier layer to prevent sintering and forming shells on their surface, which eliminates hindrances to the shell forming reaction due to the phase transfer catalyst or other strongly sticky dispersant, is provided.Type: ApplicationFiled: April 25, 2007Publication date: August 26, 2010Inventors: Tetsuya Shoji, Naoki Nakamura, Akira Kato, Shinpei Yamamoto, Mikio Takano, Teruo Ono
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Publication number: 20070259133Abstract: A FePt alloy nanoparticle, which is expected to be a promising material used for an ultra-high-density magnetic recording medium of the next generation, is ordered by heat treatment to have high magnetic anisotropy, but there has been a problem that the particles are coalesced with each other and agglomerate during the heat treatment. According to the present invention, each particle of the alloy nanoparticles is covered with a coating such as SiO2, and thereafter a heat treatment for ordering is carried out. In this method, the alloy nanoparticles do not coalesce with each other even if the heat treatment is performed at such a high temperature as to allow all the particles to be fully ordered. After the heat treatment, only the coating is removed using an acid or alkali solution so that it is possible to obtain ordered alloy phase nanoparticles which are ordered and dispersible in various solutions.Type: ApplicationFiled: December 7, 2005Publication date: November 8, 2007Applicant: KYOTO UNIVERSITYInventors: Teruo Ono, Shinpei Yamamoto, Yasumasa Morimoto, Mikio Takano
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Patent number: 6030839Abstract: Preparations are made of a characteristic curve of conductivity showing the relationship between sodium concentration in alcohol and conductivity of alcohol as observed at a predetermined temperature and a temperature correction curve showing the change in conductivity per unit degree centigrade of alcohol temperature versus; sodium concentration in alcohol; the corrected conductivity of a sample alcohol is determined by measuring the conductivity and temperature of the sample alcohol simultaneously and subjecting the measured conductivity to temperature correction according to the above temperature correction curve; and then the sodium concentration in the sample alcohol is determined on the basis of the corrected conductivity thus obtained. Thus, the change in sodium concentration in alcohol can be measured and monitored continuously and accurately.Type: GrantFiled: March 9, 1998Date of Patent: February 29, 2000Assignee: Japan Nuclear Cycle Development InstituteInventors: Shinpei Yamamoto, Satoru Nakai, Toshio Yatabe
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Patent number: 5766465Abstract: The present invention is directed to provide a water treatment technology able to perform advanced purification treatment by efficiently removing synthetic organic compounds such as surface activators for use in cleaners and agricultural chemicals present in polluted water having a relatively low load of pollutants such as BOD. In order to accomplish this objective, water to be treated is brought in contact with a assimilable filter medium under aerobic conditions, said assimilable filter medium being composed by adhering a material to be assimilated that has specific assimilability for the target microorganisms to a porous base material such as charcoal. As a result of using this type of assimilable filter medium, specific microorganisms which are highly efficient for removing the synthetic organic pollutants to be removed can be utilized selectively, thereby enabling efficient removal of synthetic organic compounds.Type: GrantFiled: May 2, 1996Date of Patent: June 16, 1998Assignee: Toyo Denka Kogyo Co., Ltd.Inventors: Shinpei Yamamoto, Kazuhiro Takagi, Etutami Kiyotani, Iwane Kagimoto, Shinichi Kariya, Satoshi Matsumoto
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Patent number: 5178952Abstract: A radiation curable resin having at least two (meth)acryloyl groups at both terminal ends of a molecular chain which is obtained by reaction of (1) a polyester polyol and/or polycarbonate polyol, (2) a diisocyanate, (3) a polyfunctional (meth)acrylate containing a hydroxyl group therein, and optionally (4) a compound having at least two active hydrogens in the molecule is disclosed. The resin has at least two (meth)acryloyl groups at a terminal end of the molecular chain. The molecular weight of the resin is 1,000 to 50,000, the urethane bonding concentration is not more than 3,000 equivalent/10.sup.6 g and the (meth)acryloyl group concentration is 100 to 6,000 equivalent/10.sup.6 g. A radiation curable resin composition containing the resin and a precoated metal using the composition are also disclosed.Type: GrantFiled: March 30, 1990Date of Patent: January 12, 1993Assignee: Toyo Boseki Kabushiki KaishaInventors: Shinpei Yamamoto, Hideyuki Ohashi, Tadashi Nakajima, Nobukazu Kotera, Takuma Kobayashi, Hiroshi Taki, Masami Oka
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Patent number: 4734480Abstract: A radiation curable resin which is a polyurethane acrylate having (meth)acryloyloxy groups at the terminal end of the molecule and in the molecular chain thereof, and containing metal sulfonate groups in the molecule in a ratio of 3.0 to 1,500 equivalent/10.sup.6 g of the resin, said polyurethane acrylate being obtained by reaction of(1) a copolyester having hydroxyl groups at both terminal ends of the molecule and containing metal sulfonate groups therein,(2) a diisocyanate,(3) a compound (A) having at least one (meth)acryloyloxy group and two hydroxyl groups,(4) a compound (B) having at least one (meth)acryloyloxy group and one hydroxyl group, and optionally(5) a polyol other than the above (1) or (3). the radiation curable resin containing a compound (C) having at least one carboxylic acid group and two hydroxyl groups in addition to the above components (1) to (5) is also disclosed.Type: GrantFiled: June 11, 1987Date of Patent: March 29, 1988Assignees: Toyo Boseki Kabushiki Kaisha, Sony CorporationInventors: Nobukazu Kotera, Yasuo Yoshinaka, Shinpei Yamamoto, Hideyuki Ohashi, Yoshinobu Ninomiya, Kiyokazu Oiyama
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Patent number: 3978381Abstract: The commutating-type thyristor inverter in a static Scherbius device including a wound induction motor is protected against damage upon the occurrence of an emergency condition, in the form of a failure or reduction of the power voltage, by shifting the commutation angle of the inverter to a minimum value and reducing the inverter current to zero, and then interrupting the supply of commutating pulses to the inverter thyristors, whereby the inverter stops operating. After the emergency condition is removed, the commutating angle of the inverter is gradually increased to its normal value to restore the inverter to normal operation. If during the emergency condition the motor speed falls below a predetermined value, then the motor is accelerated through a starting resistance to a speed above this value before normal operation of the inverter is resumed.Type: GrantFiled: April 15, 1975Date of Patent: August 31, 1976Assignee: Fuji Electric CompanyInventors: Shinpei Yamamoto, Takeshi Uemura