Patents by Inventor Kei Yasui
Kei Yasui 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: 11466743Abstract: Provided are a bracket for an anti-vibration device, and a method for manufacturing the same, in which increase of weight and peeling of a reinforcing portion are suppressed. A bracket (1) has: a reinforcing portion (20) extending in a surrounding direction of the surrounding portion (10), having ends (21) in both directions of the surrounding direction, and being fixed to an outer surface of the portion (10); and ribs (30) formed on an outer circumference of the portion (10) so as to span the ends (21) of the reinforcing portion (20) in the surrounding direction of the portion (10). The portion (10) and the ribs (30) are made of synthetic resin. A method for manufacturing the bracket (1) includes a step of injecting synthetic resin serving as the portion (10) and the ribs (30) into a mold cavity where a reinforcing member serving as the portion (20) is set.Type: GrantFiled: October 25, 2018Date of Patent: October 11, 2022Assignee: Prospira CorporationInventors: Tadashi Onishi, Yukiko Abe, Kenichirou Iwasaki, Masato Kobayashi, Kei Yasui
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Patent number: 11408479Abstract: A anti-vibration device (1) includes a bracket (4) made of a synthetic resin and cylindrical metal fittings for fastening (5), where the bracket (4) and the metal fittings for fastening (5) are integrally formed. A vibration input position (P) is a position that does not coincide with a virtual line (L1) passing through central axes (O5) of a through holes (5h) of two metal fittings for fastening (5) in a planar view; the metal fitting for fastening (5) has a flange portion (51); and the flange portion 51 has a first outermost peripheral edge (51a) and a second outermost peripheral edge (51b), where a length (L51a) to the first outermost peripheral edge (51a) is longer than a length (L51b) to the second outermost peripheral edge (51b) based on the center axis (O5) of the through hole (5h).Type: GrantFiled: November 6, 2018Date of Patent: August 9, 2022Assignee: BRIDGESTONE CORPORATIONInventors: Tadashi Onishi, Yukiko Abe, Kenichirou Iwasaki, Masato Kobayashi, Kei Yasui
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Patent number: 11352470Abstract: The present invention achieves higher performance (improvement in, for example, heat resistance, durability, and mechanical characteristics) of polyamide resin by a method which is not dependent on a combination with fibers. According to an embodiment of a polyamide resin member of the present invention, the polyamide resin member contains nano-oriented crystals of polyamide 66, and has a high heatproof temperature (Th?278° C.) and a high melting point (Tm?282° C.).Type: GrantFiled: May 9, 2018Date of Patent: June 7, 2022Assignee: BRIDGESTONE CORPORATIONInventors: Masamichi Hikosaka, Kiyoka Okada, Kenichiro Iwasaki, Kei Yasui, Katsuomi Tanahashi, Katsumi Nabeshima, Mai Ishikawa
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Patent number: 11061297Abstract: A nonlinear optically active copolymer having satisfactory orientation characteristics and able to allow for reduction in heat-induced orientation relaxation of a nonlinear optical material, and a nonlinear optical material obtained using the copolymer. The copolymer including at least a repeating unit A having adamantyl group and a repeating unit B having a nonlinear optically active moiety in one molecule, and an organic nonlinear optical material including the copolymer as a component.Type: GrantFiled: March 16, 2017Date of Patent: July 13, 2021Assignees: KYUSHU UNIVERSITY, NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Shiyoshi Yokoyama, Hiroki Miura, Daisuke Maeda, Kei Yasui, Tsubasa Kashino, Masaaki Ozawa
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Publication number: 20200318703Abstract: A anti-vibration device (1) includes a bracket (4) made of a synthetic resin and cylindrical metal fittings for fastening (5), where the bracket (4) and the metal fittings for fastening (5) are integrally formed. A vibration input position (P) is a position that does not coincide with a virtual line (L1) passing through central axes (O5) of a through holes (5h) of two metal fittings for fastening (5) in a planar view; the metal fitting for fastening (5) has a flange portion (51); and the flange portion 51 has a first outermost peripheral edge (51a) and a second outermost peripheral edge (51b), where a length (L51a) to the first outermost peripheral edge (51a) is longer than a length (L51b) to the second outermost peripheral edge (51b) based on the center axis (O5) of the through hole (5h).Type: ApplicationFiled: November 6, 2018Publication date: October 8, 2020Applicant: BRIDGESTONE CORPORATIONInventors: Tadashi ONISHI, Yukiko ABE, Kenichirou IWASAKI, Masato KOBAYASHI, Kei YASUI
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Publication number: 20200300326Abstract: Provided are a bracket for an anti-vibration device, and a method for manufacturing the same, in which increase of weight and peeling of a reinforcing portion are suppressed. A bracket (1) has: a reinforcing portion (20) extending in a surrounding direction of the surrounding portion (10), having ends (21) in both directions of the surrounding direction, and being fixed to an outer surface of the portion (10); and ribs (30) formed on an outer circumference of the portion (10) so as to span the ends (21) of the reinforcing portion (20) in the surrounding direction of the portion (10). The portion (10) and the ribs (30) are made of synthetic resin. A method for manufacturing the bracket (1) includes a step of injecting synthetic resin serving as the portion (10) and the ribs (30) into a mold cavity where a reinforcing member serving as the portion (20) is set.Type: ApplicationFiled: October 25, 2018Publication date: September 24, 2020Applicant: BRIDGESTONE CORPORATIONInventors: Tadashi ONISHI, Yukiko ABE, Kenichirou IWASAKI, Masato KOBAYASHI, Kei YASUI
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Patent number: 10717818Abstract: It is possible to obtain a thin film that can form a minute pattern and that has a high index of refraction by using a polymer containing a triazine ring and containing a repeating unit structure represented for example by formula (22) or (26).Type: GrantFiled: August 12, 2015Date of Patent: July 21, 2020Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Naoya Nishimura, Takahiro Kaseyama, Kei Yasui, Daisuke Maeda
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Patent number: 10703863Abstract: There is provided a polymerizable composition suitable to produce a molded product in which high refractive index is maintained, and dimensional change and a transmittance change further caused by a high-temperature heat history can be suppressed. A polymerizable composition comprising (a) 100 parts by mass of a specific reactive silsesquioxane compound and (b) 10 to 2,000 parts by mass of a specific fluorene compound, and a cured product obtained by curing the polymerizable composition, and a resin lens manufactured from the polymerizable composition.Type: GrantFiled: September 1, 2016Date of Patent: July 7, 2020Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Kei Yasui, Takehiro Nagasawa, Taku Kato, Keisuke Shuto
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Publication number: 20200157295Abstract: The present invention achieves higher performance (improvement in, for example, heat resistance, durability, and mechanical characteristics) of polyamide resin by a method which is not dependent on a combination with fibers. According to an embodiment of a polyamide resin member of the present invention, the polyamide resin member contains nano-oriented crystals of polyamide 66, and has a high heatproof temperature (Th?278° C.) and a high melting point (Tm?282° C.).Type: ApplicationFiled: May 9, 2018Publication date: May 21, 2020Applicant: BRIDGESTONE CORPORATIONInventors: Masamichi HIKOSAKA, Kiyoka OKADA, Kenichiro IWASAKI, Kei YASUI, Katsuomi TANAHASHI, Katsumi NABESHIMA, Mai ISHIKAWA
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Patent number: 10498101Abstract: A method for producing an organic microdisk structure 40, which is characterized by comprising: a cladding layer formation step 1 wherein a cladding layer 12 is formed by printing a first ink 11 that contains a fluorine-containing hyperbranched polymer on a substrate 10 by an inkjet method; a core layer formation step 2 wherein a core layer 22 is formed by printing a second ink 21 that contains a laser dye and a triazine-based hyperbranched polymer containing no fluorine on the cladding layer 12 by an inkjet method; and an etching step 3 wherein the cladding layer 12 is etched using a solvent 31 that dissolves only the fluorine-containing hyperbranched polymer. Consequently, an unconventional novel method for producing an organic microdisk structure with use of an inkjet method is able to be provided.Type: GrantFiled: September 4, 2015Date of Patent: December 3, 2019Assignees: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Yuji Oki, Hiroaki Yoshioka, Kei Yasui, Masaaki Ozawa
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Publication number: 20190085199Abstract: A nonlinear optically active copolymer having satisfactory orientation characteristics and able to allow for reduction in heat-induced orientation relaxation of a nonlinear optical material, and a nonlinear optical material obtained using the copolymer. The copolymer including at least a repeating unit A having adamantyl group and a repeating unit B having a nonlinear optically active moiety in one molecule, and an organic nonlinear optical material including the copolymer as a component.Type: ApplicationFiled: March 16, 2017Publication date: March 21, 2019Applicants: KYUSHU UNIVERSITY, NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Shiyoshi YOKOYAMA, Hiroki MIURA, Daisuke MAEDA, Kei YASUI, Tsubasa KASHINO, Masaaki OZAWA
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Patent number: 10174164Abstract: Provided is a triazine ring-containing hyperbranched polymer comprising the repeating unit structure represented by formula (1) and having one or more triazine ring terminals, said one or more triazine ring terminals being capped with a compound that differs from the diamine compound serving as the starting material for the polymer and has at least two active hydrogen groups. In addition to the polymer itself exhibiting high heat resistance, high transparency, a high refractive index, high light resistance, high solubility, and low volume shrinkage, it is also possible to use the polymer to provide a composition for film formation capable of yielding a thick film having high hardness. (In formula (1), R and R? each independently represent a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, or an aralkyl group, and Ar represents a divalent organic group containing an aromatic ring and/or a heterocyclic ring.Type: GrantFiled: December 20, 2012Date of Patent: January 8, 2019Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Naoya Nishimura, Kei Yasui, Masaaki Ozawa
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Publication number: 20180244852Abstract: There is provided a polymerizable composition suitable to produce a molded product in which high refractive index is maintained, and dimensional change and a transmittance change further caused by a high-temperature heat history can be suppressed. A polymerizable composition comprising (a) 100 parts by mass of a specific reactive silsesquioxane compound and (b) 10 to 2,000 parts by mass of a specific fluorene compound, and a cured product obtained by curing the polymerizable composition, and a resin lens manufactured from the polymerizable composition.Type: ApplicationFiled: September 1, 2016Publication date: August 30, 2018Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Kei YASUI, Takehiro NAGASAWA, Taku KATO, Keisuke SHUTO
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Publication number: 20180215870Abstract: It is possible to obtain a thin film that can form a minute pattern and that has a high index of refraction by using a polymer containing a triazine ring and containing a repeating unit structure represented for example by formula (22) or (26).Type: ApplicationFiled: August 12, 2015Publication date: August 2, 2018Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Naoya NISHIMURA, Takahiro KASEYAMA, Kei YASUI, Daisuke MAEDA
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Publication number: 20170264066Abstract: A method for producing an organic microdisk structure 40, which is characterized by comprising: a cladding layer formation step 1 wherein a cladding layer 12 is formed by printing a first ink 11 that contains a fluorine-containing hyperbranched polymer on a substrate 10 by an inkjet method; a core layer formation step 2 wherein a core layer 22 is formed by printing a second ink 21 that contains a laser dye and a triazine-based hyperbranched polymer containing no fluorine on the cladding layer 12 by an inkjet method; and an etching step 3 wherein the cladding layer 12 is etched using a solvent 31 that dissolves only the fluorine-containing hyperbranched polymer. Consequently, an unconventional novel method for producing an organic microdisk structure with use of an inkjet method is able to be provided.Type: ApplicationFiled: September 4, 2015Publication date: September 14, 2017Applicants: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Yuji OKI, Hiroaki YOSHIOKA, Kei YASUI, Masaaki OZAWA
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Publication number: 20170242189Abstract: An optical waveguide which has sufficient orientation characteristics and its manufacturing processes are simple to be suitable for the manufacture of electro-optic elements and that can be reduced the power consumption by its large electro-optic characteristics and further can be thinned and stacked, and the material thereof. This material is characterized in a polymer compound that includes an oxazoline structure in a side chain, and an acid generator or a polyvalent carboxylic acid.Type: ApplicationFiled: September 2, 2015Publication date: August 24, 2017Applicants: KYUSHU UNIVERSITY, NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Shiyoshi YOKOYAMA, Kazuhiro YAMAMOTO, Hiromu SATO, Daisuke MAEDA, Masaaki OZAWA, Kei YASUI
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Patent number: 9594189Abstract: There is provided an optical waveguide which has appropriate orientation properties, a production process of which is simple so as to be suitable for producing an electro-optical element, and is able to reduce power consumption of the element due to excellent electro-optical properties, and further can be formed into a thin film and be layered; and a material for the optical waveguide. A cladding material of an optical waveguide, characterized by comprising a polymer compound including a triarylamine structure, and a nonlinear optical compound; and an optical waveguide produced by using the cladding material.Type: GrantFiled: August 13, 2012Date of Patent: March 14, 2017Assignees: NISSAN CHEMICAL INDUSTRIES, LTD., KYUSHU UNIVERSITYInventors: Shiyoshi Yokoyama, Kazuhiro Yamamoto, Kei Yasui, Masaaki Ozawa, Keisuke Odoi
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Patent number: 9502592Abstract: A film-forming composition is characterized by containing: a triazine ring-containing hyperbranched polymer containing a repeating unit structure represented by formula (1); and a dissolution-enhancing agent for breaking a hydrogen bond formed at least within the hyperbranched polymer and/or between molecules, between a nitrogen atom in the triazine ring, and a diarylamine-derived NH group. The film-forming composition has excellent dissolvability in organic solvents such as resist solvents, and has good handling and filtration properties at low viscosity. (In the formula, R and R? each independently represent a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, or an aralkyl group (however, at least one of R and R? represents a hydrogen atom); and Ar represents a divalent organic group containing an aromatic ring and/or a heterocyclic ring).Type: GrantFiled: October 28, 2011Date of Patent: November 22, 2016Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Naoya Nishimura, Taku Kato, Yasuyuki Koide, Kei Yasui, Hideki Musashi, Masaaki Ozawa
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Patent number: 9382381Abstract: An aromatic polyamide, which is obtained by reacting a benzene tricarboxylic acid or a derivative thereof with a diamine compound in the presence of a terminally blocked compound having a crosslinkable group and a functional group that is reactive with a benzene tricarboxylic acid such as 1-amino-2-propanol or a derivative thereof as expressed by scheme (1), and which has a weight average molecular weight of 1,000-100,000 in terms of polystyrene as determined by gel permeation chromatography, has good solubility in organic solvents, while maintaining heat resistance and transparency. A thick film can be formed using a film-forming composition that contains this aromatic polyamide.Type: GrantFiled: June 27, 2013Date of Patent: July 5, 2016Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Daisuke Maeda, Kei Yasui, Masaaki Ozawa
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Publication number: 20150252147Abstract: An aromatic polyamide, which is obtained by reacting a benzene tricarboxylic acid or a derivative thereof with a diamine compound in the presence of a terminally blocked compound having a crosslinkable group and a functional group that is reactive with a benzene tricarboxylic acid such as 1-amino-2-propanol or a derivative thereof as expressed by scheme (1), and which has a weight average molecular weight of 1,000-100,000 in terms of polystyrene as determined by gel permeation chromatography, has good solubility in organic solvents, while maintaining heat resistance and transparency. A thick film can be formed using a film-forming composition that contains this aromatic polyamide.Type: ApplicationFiled: June 27, 2013Publication date: September 10, 2015Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Daisuke Maeda, Kei Yasui, Masaaki Ozawa