Patents by Inventor Reishi Naka
Reishi Naka 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: 6991366Abstract: A method of measuring the heat conductivity of an object to be measured, comprising generating heat between the object to be measured and a heat resistant material, causing heat to flow through the interior of the object to be measured and the interior of the heat resistant material and obtaining the heat conductivity of the object to be measured from a temperature difference between at least two points of the heat resistant material, a heat conductivity measuring instrument using the same and a method of producing a heat insulating material.Type: GrantFiled: October 23, 2001Date of Patent: January 31, 2006Assignees: Nisshinbo Industries, Inc., EKO Instruments Trading Co., Ltd.Inventors: Reishi Naka, Masato Hayashi, Tomohiro Koyama, Toshikazu Hasegawa, Takeshi Aoshima
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Patent number: 6651444Abstract: A method of easily deforming a plate-shape vacuum insulation material and producing a smaller but highly effective insulation container, comprising steps of inserting a thermoplastic open-celled rigid foam as a core material into a packet composed of gas barrier film, evacuating and sealing the packet so as to produce a vacuum insulation material, heating and softening the vacuum insulation material so as to deform the same, and cooling the vacuum insulation material so as to cure the same, and also a freezing and refrigerating container having Peliter element.Type: GrantFiled: November 15, 2001Date of Patent: November 25, 2003Assignee: Nisshinbo Industries, Inc.Inventors: Kiyotake Morimoto, Michihiro Oga, Masato Hayashi, Junichi Hosaka, Reishi Naka
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Publication number: 20020136261Abstract: A method of measuring the heat conductivity of an object to be measured, comprising generating heat between the object to be measured and a heat resistant material, causing heat to flow through the interior of the object to be measured and the interior of the heat resistant material and obtaining the heat conductivity of the object to be measured from a temperature difference between at least two points of the heat resistant material, a heat conductivity measuring instrument using the same and a method of producing a heat insulating material.Type: ApplicationFiled: October 23, 2001Publication date: September 26, 2002Applicant: Nisshinbo Industries, Inc.Inventors: Reishi Naka, Masato Hayashi, Tomohiro Koyama, Toshikazu Hasegawa, Takeshi Aoshima
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Patent number: 6258293Abstract: A refrigerating apparatus comprising a refrigeration cycle comprising at least a compressor, a condenser, a dryer, an expansion mechanism and an evaporator, a refrigerant composed mainly of a fluorocarbon type refrigerant containing no chlorine and having a critical temperature of 40° C. or higher, and a refrigerating machine oil comprising as base oil an ester oil of one or more fatty acids which contains at least two ester linkages in the molecule and has a viscosity at 40° C. of 2 to 70 cSt and a viscosity at 100° C. of 1 to 9 cSt.Type: GrantFiled: December 2, 1999Date of Patent: July 10, 2001Assignee: Hitachi, Ltd.Inventors: Tadashi Iizuka, Reishi Naka, Katsumi Fukuda, Makoto Tanaka, Yoshiharu Homma, Hiroaki Hata, Hirokatsu Kousokabe, Koji Nariyoshi, Hiroshi Iwata
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Patent number: 6235806Abstract: In order to provide an open-celled rigid polyurethane foam, which realizes a low material cost per unit volume of the foam and excellent surface smoothness because of its unique structure, and a thermal insulation material comprising the foam, an open-celled rigid polyurethane foam which has an open cell content of not less than 99% in a state that a skin layer is left on the foam is produced by foam molding, preferably multiple-stage compression molding, of foaming components containing a polyol component and an isocyanate component with an equivalent ratio of NCO/OH of about 0.55-0.95, and a blowing agent, preferably water, and a thermal insulation material is produced from the foam preferably subjected to a baking treatment by means of far-infrared ray exposure.Type: GrantFiled: June 22, 1999Date of Patent: May 22, 2001Assignee: Nisshinbo Industries, Inc.Inventors: Michihiro Ohga, Masato Hayashi, Junnichi Hosaka, Reishi Naka
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Patent number: 6029459Abstract: A refrigerating apparatus comprising a refrigeration cycle comprising at least a compressor, a condenser, a dryer, an expansion mechanism and an evaporator, a refrigerant composed mainly of a fluorocarbon type refrigerant containing no chlorine and having a critical temperature of 40.degree. C. or higher, and a refrigerating machine oil comprising as base oil an ester oil of one or more fatty acids which contains at least two ester linkages ##STR1## in the molecule and has a viscosity at 40.degree. C. of 2 to 70 cSt and a viscosity at 100.degree. C. of 1 to 9 cSt.Type: GrantFiled: April 22, 1998Date of Patent: February 29, 2000Assignee: Hitachi, Ltd.Inventors: Tadashi Iizuka, Reishi Naka, Katsumi Fukuda, Makoto Tanaka, Yoshiharu Homma, Hiroaki Hata, Hirokatsu Kousokabe, Koji Nariyoshi, Hiroshi Iwata
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Patent number: 5964581Abstract: A refrigerant compressor using a refrigerant composed mainly of a fluorocarbon and/or hydrofluorocarbon type refrigerant containing no chlorine and having a critical temperature of 40.degree. C. or higher, and a refrigerating machine oil comprising as base oil an ester oil of one or more fatty acids which contains at least two ester linkages ##STR1## in the molecule and has a viscosity at 40.degree. C. of 2 to 70 cSt and a viscosity at 100.degree. C. of 1 to 9 cSt. The winding wire of the stator of the compressor has a core wire having an enamel coating having a glass transition temperature of 120.degree. C. or higher.Type: GrantFiled: March 4, 1996Date of Patent: October 12, 1999Assignee: Hitachi, Ltd.Inventors: Tadashi Iizuka, Reishi Naka, Katsumi Fukuda, Makoto Tanaka, Yoshiharu Homma, Hiroaki Hata, Hirokatsu Kousokabe, Koji Nariyoshi, Hiroshi Iwata
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Patent number: 5711165Abstract: A regrigerating apparatus comprising a refrigeration cycle comprising at least a compressor, a condenser, a dryer, an expansion mechanism and an evaporator, a refrigerant composed mainly of a fluorocarbon type refrigerant containing no chlorine and having a critical temperature of 40.degree. C. or higher, and a refrigerating machine oil comprising as base oil an ester oil of one or more fatty acids which contains at least two ester linkages ##STR1## in the molecule and has a viscosity at 40.degree. C. of 2 to 70 cSt and a viscosity at 100.degree. C. of 1 to 9 cSt.Type: GrantFiled: September 20, 1994Date of Patent: January 27, 1998Assignee: Hitachi, Ltd.Inventors: Tadashi Iizuka, Reishi Naka, Katsumi Fukuda, Makoto Tanaka, Yoshiharu Homma, Hiroaki Hata, Hirokatsu Kousokabe, Koji Nariyoshi, Hiroshi Iwata
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Patent number: 5553465Abstract: A lubricant composition comprising as a base oil one or more ester oils, alkylbenzene oils and mineral oils, and a glycidyl ether compound having at least two epoxy groups is miscible in hydrofluorocarbon and hydrochlorofluorocarbon refrigerants such as R134a, etc. as replacing refrigerants of R12 and provides a stable operation of refrigeration compressor for a long period of time without causing corrosion and wear of a sliding portion of the compressor.Type: GrantFiled: October 13, 1994Date of Patent: September 10, 1996Assignee: Hitachi, Ltd.Inventors: Katsumi Fukuda, Tadashi IIzuka, Reishi Naka, Hiroaki Hata, Masahiko Gommori, Yoshiharu Homma
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Patent number: 5445753Abstract: A lubricant composition comprising as a base oil one or more ester oils, alkylbenzene oils and mineral oils, and a glycidyl ether compound having at least two epoxy groups is miscible in hydrofluorocarbon and hydrochlorofluorocarbon refrigerants such as R134a, etc. as replacing refrigerants of R12 and provides a stable operation of refrigeration compressor for a long period of time without causing corrosion and wear of a sliding portion of the compressor.Type: GrantFiled: March 17, 1993Date of Patent: August 29, 1995Assignee: Hitachi, Ltd.Inventors: Katsumi Fukuda, Tadashi Iizuka, Reishi Naka, Hiroaki Hata, Masahiko Gommori, Yoshiharu Homma
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Patent number: 5417872Abstract: A lubricant composition comprising as a base oil one or more ester oils, alkylbenzene oils and mineral oils, and a glycidyl ether compound having at least two epoxy groups is miscible in hydrofluorocarbon and hydrochlorofluorocarbon refrigerants such as R134a, etc. as replacing refrigerants of R12 and provides a stable operation of refrigeration compressor for a long period of time without causing corrosion and wear of a sliding portion of the compressor.Type: GrantFiled: March 17, 1993Date of Patent: May 23, 1995Assignee: Hitachi, Ltd.Inventors: Katsumi Fukuda, Tadashi Iizuka, Reishi Naka, Hiroaki Hata, Masahiko Gommori, Yoshiharu Homma
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Patent number: 5216040Abstract: A rigid polyurethane foam obtained by foaming a special polyol component and an isocyanate component in the presence of a blowing agent comprising water and at least one member selected from the group consisting of 1,1-dichloro-2,2,2-trifluoroethane and 2,2-dichloro-2-monofluoroethane possesses balanced excellent properties, has no surface void, and shows only slight expansion after molding. Therefore, it can be effectively used as a heat insulator, in particular, a heat insulator for refrigerators.Type: GrantFiled: November 21, 1990Date of Patent: June 1, 1993Assignee: Hitachi, Ltd.Inventors: Kazuyoshi Kuroishi, Reishi Naka, Isao Kobayashi, Kousuke Tanaka, Katuhiko Gotoo
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Patent number: 5173517Abstract: A rigid polyurethane foam obtained by foaming a special polyol component and an isocyanate component using only water as a blowing agent has balanced excellent properties including a remarkably low density and a low thermal conductivity and is suitable for use as a heat insulator, particularly in a refrigerator.Type: GrantFiled: December 19, 1990Date of Patent: December 22, 1992Assignee: Hitachi, Ltd.Inventors: Kazuyoshi Kuroishi, Reishi Naka, Isao Kobayashi
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Patent number: 5034425Abstract: A rigid polyurethane foam produced by reacting a special polyol component with an isocyanate component in the presence of a blowing agent containing water in an amount of 2 to 3.5% by weight per 100% by weight of the polyol component is excellent in fluidity with balanced excellent properties.Type: GrantFiled: October 21, 1989Date of Patent: July 23, 1991Assignee: Hitachi, Ltd.Inventors: Kazuyoshi Kuroishi, Reishi Naka, Isao Kobayashi
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Patent number: 4955208Abstract: A photocatalystic decomposing apparatus comprises absorbent including honeycomb form active carbon and titanium oxide acting as photocatalyst applied to a surface of the active carbon, and a light source for generating ultraviolet rays exciting the photocatalyst. Stink ingredient is absorbed to the active carbon by passing air flow through openings in the honeycomb, and the absorbed stink ingredient is decomposed by exciting the photocatalyst due to application of the ultraviolet rays.Type: GrantFiled: January 8, 1990Date of Patent: September 11, 1990Assignee: Hitachi, Ltd.Inventors: Masaei Kawashima, Reishi Naka, Teruo Tsunoda, Nobuyoshi Suenaga, Syozo Ogawa, Masaaki Kashiwabuchi, Miyakichi Kameda, Koosuke Tanaka
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Patent number: 4954465Abstract: A photocatalystic decomposing apparatus comprises absorbent including honeycomb form active carbon and titanium oxide acting as photocatalyst applied to a surface of the active carbon, and a light source for generating ultraviolet rays exciting the photocatalyst. Stink ingredient is absorbed to the active carbon by passing air flow through openings in the honeycomb, and the absorbed stink ingredient is decomposed by exciting the photocatalyst due to application of the ultraviolet rays.Type: GrantFiled: January 11, 1989Date of Patent: September 4, 1990Assignee: Hitachi, Ltd.Inventors: Masaei Kawashima, Reishi Naka, Teruo Tsunoda, Nobuyoshi Suenaga, Syozo Ogawa, Masaaki Kashiwabuchi, Miyakichi Kameda, Koosuke Tanaka
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Patent number: 4742089Abstract: Rigid polyurethane foams produced by reacting a polyol component having a special composition with an isocyanate component in the presence of a blowing agent, a reaction catalyst and a foam stabilizer with a mold release time of as short as 5.5 minutes or less, have remarkably low thermal conductivity of 12.5.times.10.sup.-3 Kcal/m.hr..degree.C. or less and a low density and are suitable as heat insulating materials for refrigerators and the like.Type: GrantFiled: August 12, 1987Date of Patent: May 3, 1988Assignee: Hitachi, Ltd.Inventors: Reishi Naka, Kazuyoshi Kuroishi
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Patent number: 4444704Abstract: Integral skin polymethane foams can be produced in a short time by impingement mixing a solution comprising polyols containing as an essential component a polyol derived from aromatic amine, a blowing agent and a special catalyst of tertiary amine salt having a hetero ring in the molecule, with a solution comprising one or more polyisocyanates, followed by injection into a closed mold and foaming and curing therein.Type: GrantFiled: January 19, 1982Date of Patent: April 24, 1984Assignee: Hitachi, Ltd.Inventors: Yasuo Hira, Susumu Tsuzuku, Masao Gotoh, Hitoshi Yokono, Reishi Naka
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Patent number: 4105599Abstract: A process for producing a rigid polyurethane foam according to one-shot method which comprises reacting a polyol component with a polyfunctional isocyanate component in the presence of a polymerization catalyst, a foam stabilizer and a foaming agent, characterized in that said polyol component consists of 35 to 65 parts by weight of a sucrose polyether and 65 to 35 parts by weight of a polyoxyalkylene glycol of trihydroxyalkylamine and has an OH number of 420 to 530. According to this process, a rigid polyurethane foam having a very low density, low friability and excellent dimensional stability at low temperatures can be obtained.Type: GrantFiled: February 3, 1976Date of Patent: August 8, 1978Assignee: Hitachi, Ltd.Inventors: Reishi Naka, Toshikazu Narahara
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Patent number: RE33290Abstract: Rigid polyurethane foams produced by reacting a polyol component having a special composition with an isocyanate component in the presence of a blowing agent, a reaction catalyst and a foam stabilizer with a mold release time of as short as 5.5 minutes or less, have remarkably low thermal conductivity of 12.5.times.10.sup.-3 Kcal/m.hr..degree.C. or less and a low density and are suitable as heat insulating materials for refrigerators and the like.Type: GrantFiled: January 19, 1989Date of Patent: August 7, 1990Assignee: Hitachi, Ltd.Inventors: Reishi Naka, Kazuyoshi Kuroishi