Patents by Inventor Ryo Sakurai
Ryo Sakurai 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: 6818287Abstract: A light shielding blade material for use in an optical apparatus is constructed by a substrate composed of a plastic film having a pair of surfaces opposed to each other. A shield coating capable of blocking an incident light is formed on each surface of the substrate. A reinforcement member is disposed on each shield coating. The reinforcement member is composed of a thermosetting resin prepreg sheet reinforced with fibers arranged in an alignment direction, and hardened to laminate with the substrate through the shield coating. A lubricant coating having a black appearance and a lubricity sufficient to suppress a surface friction is formed on each reinforcement member such that an upper layer of the lubricant coating and a lower layer of the shield coating are separated from each other by an intermediate layer of the reinforcement member.Type: GrantFiled: August 30, 1999Date of Patent: November 16, 2004Assignee: Nidec Copal CorporationInventors: Takao Ogawa, Ryo Sakurai, Noribumi Tachihara
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Patent number: 6770820Abstract: By using a conductive adhesive prepared by dispersing conductive particles such as a nickel filler in a thermally or optically curable adhesive comprising a base resin having heat resistance and flexibility after curing, such as EVA, PVB, acrylic resin or unsaturated polyester, as an adhesive for making the shielding conductive layer of a shielded flat cable conductive with the ground line of a cable body in a non-insulated portion and bonding the cable body to the shielding member, the heat resistance and connection reliability in a high temperature and high humidity condition of the shielded flat cable are ensured. To further improve adhesion, a phosphoric acid methacrylate and melamine-based resin are blended with the above base resin.Type: GrantFiled: March 12, 2002Date of Patent: August 3, 2004Assignee: Kabushiki Kaisha BridgestoneInventors: Ryo Sakurai, Hidetoshi Hiraoka, Tokuo Okada, Yasuhiro Morimura, Teruo Miura
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Patent number: 6706391Abstract: An anisotropically electroconductive film, which has a high reliability in its capacity for conducting electricity and also a good adhesion under such an adhesive condition that the film is heated at a temperature of 130° C. or less for a short period of time, has a layer of an adhesive within which electroconductive particles are distributed. The adhesive is composed of a thermosetting resin composition including a base resin, a reactive compound, an organic peroxide and a reaction accelerating compound, and also the electroconductive particles incorporated into the thermosetting resin composition. The base resin is a polyacetalized resin which is obtained by acetalizing a polyvinyl alcohol. The reactive compound is at least one selected from a group consisting of acryloxy group-bearing compounds, methacryloxy group-bearing compounds and epoxy group-bearing compounds. The reaction accelerating compound is a compound which has a radically reactive group and alkali-reactive group as its end groups.Type: GrantFiled: July 26, 2001Date of Patent: March 16, 2004Assignee: Bridgestone CorporationInventors: Ryo Sakurai, Hidetoshi Hiraoka, Tokuo Okada, Teruo Miura, Yasuhiro Morimura
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Publication number: 20030185557Abstract: A light shielding blade material is provided for an optical apparatus and has at least three prepreg sheets each being comprised of an epoxy resin of a thermosetting type as a matrix resin and containing a fiber drawn in an alignment direction within the matrix resin. These prepreg sheets are superposed upon each other so that the alignment directions of the fibers of the prepreg sheets disposed adjacent to each other cross at right angles to each other. The material has also two or more films each being comprised of an epoxy resin of a non-cured state as a base resin and containing 15 to 40 weight % of carbon black in the epoxy resin. These films are disposed to form a laminate of the prepreg sheets and the films so that the prepreg sheets contact one surface or both surfaces of each film.Type: ApplicationFiled: March 24, 2003Publication date: October 2, 2003Applicant: Nidec Copal CorporationInventors: Ryo Sakurai, Takao Ogawa
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Publication number: 20020189847Abstract: By using a conductive adhesive prepared by dispersing conductive particles such as a nickel filler in a thermally or optically curable adhesive comprising a base resin having heat resistance and flexibility after curing, such as EVA, PVB, acrylic resin or unsaturated polyester, as an adhesive for making the shielding conductive layer of a shielded flat cable conductive with the ground line of a cable body in a non-insulated portion and bonding the cable body to the shielding member, the heat resistance and connection reliability in a high temperature and high humidity condition of the shielded flat cable are ensured.Type: ApplicationFiled: March 12, 2002Publication date: December 19, 2002Inventors: Ryo Sakurai, Hidetoshi Hiraoka, Tokuo Okada, Yasuhiro Morimura, Teruo Miura
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Publication number: 20020010247Abstract: An anisotropically electroconductive film, which has a high reliability in its capacity for conducting electricity and also a good adhesion under such an adhesive condition that the film is heated at a temperature of 130° C. or less for a short period of time, has a layer of an adhesive within which electroconductive particles are distributed. The adhesive is composed of a thermosetting resin composition including a base resin, a reactive compound, an organic peroxide and a reaction accelerating compound, and also the electroconductive particles incorporated into the thermosetting resin composition. The base resin is a polyacetalized resin which is obtained by acetalizing a polyvinyl alcohol. The reactive compound is at least one selected from a group consisting of acryloxy group-bearing compounds, methacryloxy group-bearing compounds and epoxy group-bearing compounds. The reaction accelerating compound is a compound which has a radically reactive group and alkali-reactive group as its end groups.Type: ApplicationFiled: July 26, 2001Publication date: January 24, 2002Applicant: BRIDGESTONE CORPORATIONInventors: Ryo Sakurai, Hidetoshi Hiraoka, Tokuo Okada, Teruo Miura, Yasuhiro Morimura
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Patent number: 6310612Abstract: A heat- and/or photo-curing adhesive composition to be used in production of a display unit integral with a touch panel by bonding the touch panel to the display unit, the adhesive composition comprising as a main component of one or more than one kind of copolymer selected from (1) ethylene-vinyl acetate copolymer; (2) copolymer of ethylene, vinyl acetate, and acrylate and/or methacrylate monomer; (3) copolymer of ethylene, vinyl acetate, and maleic acid and/or maleic anhydride; and (4) copolymer of ethylene, acrylate and/or methacrylate monomer, and maleic acid and/or maleic anhydride.Type: GrantFiled: December 23, 1998Date of Patent: October 30, 2001Assignee: Bridgestone CorporationInventors: Hidefumi Kotsubo, Tetsuo Kitano, Ryo Sakurai, Takahiro Matsuse, Yasuhiro Morimura
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Patent number: 6194492Abstract: Disclosed is an anisotropic conductive film which exhibits a conductivity in the thickness direction thereof by pressurizing the film in the thickness direction, the film including: an adhesive; and conductive particles dispersed in the adhesive; wherein the adhesive is a thermosetting or photosetting adhesive containing as a main component at least one kind selected from a group consisting of (a) a polymer obtained by acetalation of a polyvinyl alcohol, (b) a compound containing an allyl group, (c) a monomer containing an acryloxy group or methacryloxy group, and (d) a polymer obtained by polymerization of one or more selected from a group consisting of an acrylic monomer and a methacrylic monomer.Type: GrantFiled: June 5, 1998Date of Patent: February 27, 2001Assignee: Bridgestone CorporationInventors: Ryo Sakurai, Takahiro Matsuse, Hidefumi Kotsubo, Tetsuo Kitano, Yasuhiro Morimura
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Patent number: 5693367Abstract: A process for producing a powder material for an electro-rheological fluid is provided. The powder material is advantageously used for an electro-rheological fluid having a property, such as viscosity, which changes by application of an electric field. A powder material for an electro-rheological fluid having a uniform distribution of particle diameters and a uniform distribution of electric conductivity can be produced by embrittling a carbonaceous powder material, pulverizing and classifying the embrittled carbonaceous powder material to obtain a carbonaceous powder material having a uniform distribution of particle diameters, and carbonizing the powder material under an atmosphere of an inert gas.Type: GrantFiled: March 19, 1996Date of Patent: December 2, 1997Assignee: Bridgestone CorporationInventors: Ryo Sakurai, Tasuku Saito
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Patent number: 5546493Abstract: In an optical waveguide comprising a transparent cladding (1) filled with a transparent liquid core (2) having a higher refractive index than the cladding, a liquid consisting of an oligomer having a phosphazene skeleton, typically phosphazene oil is used as the core (2). The waveguide is well resistant to heat and weathering, ensures stable performance in a wide temperature range over a long period of time, and provides good light transmission in a wide wavelength range covering the UV, visible and IR spectra.Type: GrantFiled: December 27, 1994Date of Patent: August 13, 1996Assignee: Bridgestone CorporationInventors: Tomoko Noguchi, Kazuo Naito, Tasuku Saito, Ryo Sakurai, Minoru Ishiharada
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Patent number: 5290821Abstract: An electro-responsive elastomeric material comprising (A) an electrically insulating polymer having a specific modulus of elasticity and (B) a fine powder dispersed in the polymer which electrically polarizes under an electric field independent of water changes its viscoelasticity upon voltage application. The powder has a mean particle size of 0.5 to 500 .mu.m and is (1) a fine carbonaceous powder having a C/H atomic ratio of from 1.2 to 5, (2) composite particles having minute particulates of an insulating material dispersed in a matrix phase of a carbonaceous or carbide material, (3) composite particles having minute particulates of a carbonaceous or carbide material dispersed in a matrix phase of an insulating material, or (4) a fine composite powder of a stratum clay mineral having a two-dimensional stratum structure with a carbonaceous or carbide material incorporated between the strata.Type: GrantFiled: October 28, 1992Date of Patent: March 1, 1994Assignee: Bridgestone CorporationInventors: Ryo Sakurai, Yasuo Kurachi, Yoshiki Fukuyama, Takayuki Maruyama, Tasuku Saito