Patents by Inventor Shigeyuki Yamamoto
Shigeyuki 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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Patent number: 11155730Abstract: The present invention provides a solvent-free varnish composition, including: a thermosetting resin (A) having two or more (meth)acryloyl groups in a molecule thereof; a thermosetting resin (B) having one or more epoxy groups in a molecule thereof; a monofunctional vinyl-based monomer having an ether bond or an ester bond; an organic peroxide having a 10-hour half-life temperature of 40° C. or more; and a curing catalyst for an epoxy resin, in which a mixed resin of the thermosetting resin (A) and the thermosetting resin (B) has an epoxy equivalent of from 500 to 5,000. The solvent-free varnish composition can be used as an insulating varnish that shows a small energy loss and requires a short curing time in its curing treatment step, and that provides a cured product that barely causes the precipitation of an oligomer or the like even when exposed to a refrigerant-based environment containing a refrigerant and a refrigerating machine oil under high temperature and high pressure.Type: GrantFiled: October 8, 2015Date of Patent: October 26, 2021Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Naoki Yasuda, Shigeyuki Yamamoto, Toshifumi Kanri, Takahiro Tsutsumi, Masashi Ono, Kosuke Sano, Yukio Hidaka
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Patent number: 10639736Abstract: A ceramic-metal structure in which a metallic body (2) is inserted into or disposed above a through hole (4h) of a ceramic substrate (4) and which includes an annular pad layer (6) disposed around the through hole; an annular ring member (8) joined to the pad layer via a first brazing filler portion (10) and having a coefficient of thermal expansion smaller than that of the metallic body; a second brazing filler portion (12) intervening between the ring member and metallic body; and brazing filler flow prevention layers (7a, 7b) covering an outer surface of the pad layer so as to expose a central region (6c) of the outer surface of the pad layer facing the first brazing filler portion. The first brazing filler portion joins the central region and the ring member without projecting to a radially inner or outer side of the flow prevention layers.Type: GrantFiled: July 14, 2017Date of Patent: May 5, 2020Assignee: NGK SPARK PLUG CO., LTD.Inventors: Muneyuki Iwata, Yoshiaki Nagaya, Toshikazu Horio, Shigeyuki Yamamoto
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Publication number: 20190126373Abstract: A ceramic-metal structure in which a metallic body (2) is inserted into or disposed above a through hole (4h) of a ceramic substrate (4) and which includes an annular pad layer (6) disposed around the through hole; an annular ring member (8) joined to the pad layer via a first brazing filler portion (10) and having a coefficient of thermal expansion smaller than that of the metallic body; a second brazing filler portion (12) intervening between the ring member and metallic body; and brazing filler flow prevention layers (7a, 7b) covering an outer surface of the pad layer so as to expose a central region (6c) of the outer surface of the pad layer facing the first brazing filler portion. The first brazing filler portion joins the central region and the ring member without projecting to a radially inner or outer side of the flow prevention layers.Type: ApplicationFiled: July 14, 2017Publication date: May 2, 2019Applicant: NGK SPARK PLUG CO., LTD.Inventors: Muneyuki IWATA, Yoshiaki NAGAYA, Toshikazu HORIO, Shigeyuki YAMAMOTO
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Patent number: 10199136Abstract: An insulating tape having a mica layer, a reinforcing layer having a filler and a fiber reinforcing material laminated on the mica layer, and a cellulose derivative layer laminated on the reinforcing layer is provided. One or more hydroxyl groups in the glucose units of the cellulose derivative are substituted with a functional group such as —CH2CH2OH or —(CH2CH2O)pH (where p is any repeating number up to 50). The weight per unit area of the mica ranges from 100 g/m2 to 200 g/m2. The filler has a maximum particle size of 100 ?m or smaller and a weight per unit area ranging from 10 g/m2 to 50 g/m2. The insulating tape is useful to form a stator coil insulating layer with high thermal conductivity, with no outflow of a filler to the exterior during production of the stator coil, and with enhanced bonding strength.Type: GrantFiled: November 13, 2014Date of Patent: February 5, 2019Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Takahiro Mabuchi, Shigeyuki Yamamoto, Makoto Tsukiji, Hiroshi Sako
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Publication number: 20180258313Abstract: The present invention provides a solvent-free varnish composition, including: a thermosetting resin (A) having two or more (meth)acryloyl groups in a molecule thereof; a thermosetting resin (B) having one or more epoxy groups in a molecule thereof; a monofunctional vinyl-based monomer having an ether bond or an ester bond; an organic peroxide having a 10-hour half-life temperature of 40° C. or more; and a curing catalyst for an epoxy resin, in which a mixed resin of the thermosetting resin (A) and the thermosetting resin (B) has an epoxy equivalent of from 500 to 5,000. The solvent-free varnish composition can be used as an insulating varnish that shows a small energy loss and requires a short curing time in its curing treatment step, and that provides a cured product that barely causes the precipitation of an oligomer or the like even when exposed to a refrigerant-based environment containing a refrigerant and a refrigerating machine oil under high temperature and high pressure.Type: ApplicationFiled: October 8, 2015Publication date: September 13, 2018Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Naoki YASUDA, Shigeyuki YAMAMOTO, Toshifumi KANRI, Takahiro TSUTSUMI, Masashi ONO, Kosuke SANO, Yukio HIDAKA
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Patent number: 9925744Abstract: An insulating tape including: a mica layer containing mica; a reinforcing layer that is laminated onto the mica layer and contains a filler and a fibrous reinforcing material; and a flat sheet layer that is laminated onto the reinforcing layer and contains flat sheet-shaped inorganic particles having an aspect ratio of at least 30. In this insulating tape, the filler is supported in advance, and does not therefore flow out during manufacture of a stator coil, for example during hot-pressing. As a result, an insulating coating exhibiting high thermal conductivity can be formed.Type: GrantFiled: December 11, 2013Date of Patent: March 27, 2018Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Takahiro Mabuchi, Shigeyuki Yamamoto, Makoto Tsukiji, Hiroshi Sako
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Patent number: 9890277Abstract: The liquid thermosetting resin composition of the present invention comprises an epoxy resin in which at least one selected from the group consisting of a linear epoxy resin having a degree of polymerization of 2 or more and an epoxy acrylate resin and at least one selected from the group consisting of a novolac-type epoxy resin and a naphthalene-type epoxy compound are linked to each other via an ether linkage, and which has a weight average molecular weight of from 2,000 to 10,000. When the liquid thermosetting resin composition of the present invention is used for insulating a stator coil of a rotating electric machine, mechanical characteristics can be improved without causing a reduction in the heat resistance.Type: GrantFiled: June 15, 2012Date of Patent: February 13, 2018Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Shigeyuki Yamamoto, Takahiro Mabuchi, Kazuki Kubo, Yuhei Awano
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Publication number: 20160329123Abstract: The insulating tape of the present invention includes a mica layer containing mica, a reinforcing layer laminated on the mica layer and containing a filler and a fiber reinforcing material, and a cellulose derivative layer laminated on the reinforcing layer. The cellulose derivative layer contains a cellulose derivative in which one or more hydroxyl groups in the glucose units are substituted with a functional group such as —CH2CH2OH or —(CH2CH2O)pH (in the formula, p is any repeating number greater than 0 up to 50). The weight per unit area of the mica ranges from 100 g/m2 to 200 g/m2. The filler has a maximum particle size of 100 ?m or smaller and a weight per unit area ranging from 10 g/m2 to 50 g/m2.Type: ApplicationFiled: November 13, 2014Publication date: November 10, 2016Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Takahiro MABUCHI, Shigeyuki YAMAMOTO, Makoto TSUKIJI, Hiroshi SAKO
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Patent number: 9331536Abstract: A rotator coil is provided that includes a coil conductor and a mica tape wound a plurality of times around an outer periphery of the coil conductor. The mica tape includes mica paper and a reinforcing member, and has an adhesive resin layer containing an acryloyl-based component and a cyanate ester-based component between the mica paper and the reinforcing members. The reinforcing member, the mica paper, or both, are impregnated with a thermosetting resin composition, and hardened.Type: GrantFiled: April 9, 2012Date of Patent: May 3, 2016Assignee: Mitsubishi Electric CorporationInventors: Takahiro Mabuchi, Shigeyuki Yamamoto, Masahiro Yoshioka, Tomohiro Kojiya
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Publication number: 20150349599Abstract: A stator coil for a rotating electrical machine, the stator coil including a stator iron core and a coil formed by winding an enamel wire around a slot of the stator iron core, in which the enamel wire is covered with a cured product of a first insulating varnish containing a polyester resin and the coil is covered with a cured product of a second insulating varnish containing an epoxy acrylate resin. The stator coil for a rotating electrical machine has an insulating layer with excellent adhesive strength to prevent thermal degradation of its enamel wire and has excellent dielectric strength properties retained for an extended period of time.Type: ApplicationFiled: December 25, 2013Publication date: December 3, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Shigeyuki YAMAMOTO, Kozue ISOZAKI, Kazuki KUBO, Atsuhiko FUNAKI
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Publication number: 20150273800Abstract: An insulating tape including: a mica layer containing mica; a reinforcing layer that is laminated onto the mica layer and contains a filler and a fibrous reinforcing material; and a flat sheet layer that is laminated onto the reinforcing layer and contains flat sheet-shaped inorganic particles having an aspect ratio of at least 30. In this insulating tape, the filler is supported in advance, and does not therefore flow out during manufacture of a stator coil, for example during hot-pressing. As a result, an insulating coating exhibiting high thermal conductivity can be formed.Type: ApplicationFiled: December 11, 2013Publication date: October 1, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Takahiro Mabuchi, Shigeyuki Yamamoto, Makoto Tsukiji, Hiroshi Sako
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Publication number: 20150225563Abstract: The liquid thermosetting resin composition of the present invention comprises an epoxy resin in which at least one selected from the group consisting of a linear epoxy resin having a degree of polymerization of 2 or more and an epoxy acrylate resin and at least one selected from the group consisting of a novolac-type epoxy resin and a naphthalene-type epoxy compound are linked to each other via an ether linkage, and which has a weight average molecular weight of from 2,000 to 10,000. When the liquid thermosetting resin composition of the present invention is used for insulating a stator coil of a rotating electric machine, mechanical characteristics can be improved without causing a reduction in the heat resistance.Type: ApplicationFiled: June 15, 2012Publication date: August 13, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Shigeyuki Yamamoto, Takahiro Mabuchi, Kazuki Kubo, Yuhei Awano
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Patent number: 9003631Abstract: A floating power generation assembly has at least three floating units (3400) provided with power generation means (3402, 3404) and floating in a body of water. At least one of the three floating units (3400) is a tension leg platform. The assembly also comprises first anchors secured to a surface beneath the water, and first cables (3414, 3416) connecting the buoyant body (3400) to the first anchors. Second anchors are secured to the underwater surface and connected by second cables (3412) to the floating units (3400). The floating units (3400) are arranged substantially at the vertices of at least one triangle or quadrilateral.Type: GrantFiled: May 10, 2010Date of Patent: April 14, 2015Inventors: Shigeyuki Yamamoto, Warren E. Colburn
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Patent number: 8912274Abstract: To obtain water-dispersible varnish used in an alternative refrigerant/refrigerating machine oil refrigerant system or a natural refrigerant/refrigerating machine oil refrigerant system, the water-dispersible varnish being capable of solving two problems, namely, reducing the volatile components and the like during thermal curing and resistance of the cured varnish to the refrigerant system, wherein the water-dispersible varnish has a specific thermosetting resin as base polymer, a specific vinyl monomer as reactive diluent, organic peroxide as reaction initiator, and water mixed therein.Type: GrantFiled: August 3, 2009Date of Patent: December 16, 2014Assignees: Mitsubishi Electric Corporation, Ryoden Kasei Co., Ltd.Inventors: Shigeyuki Yamamoto, Yoshinori Shirafuji, Toshifumi Kanri, Satoru Toyama, Nobuyuki Kamegawa, Yukio Hidaka
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Publication number: 20140327335Abstract: An electromagnetic coil having an insulating coating formed by alternately laminating, on a coil conductor, a mica layer including mica and a reinforcing layer including fiber reinforcing material, inorganic particles and resin, wherein the inorganic particles include secondary agglomerate particles formed by agglomeration of primary particles of hexagonal crystal boron nitride. The electromagnetic coil is provided with an insulating coating that suppresses external outflow of inorganic particles and ensures favorable thermal conductivity. Furthermore, the invention also provides an insulating tape having a mica layer including mica and a reinforcing layer including fiber reinforcing material, inorganic particles and resin, which is layered on the mica layer, wherein the inorganic particles include secondary agglomerate particles formed by agglomeration of primary particles of hexagonal crystal boron nitride.Type: ApplicationFiled: November 12, 2012Publication date: November 6, 2014Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Takahiro Mabuchi, Shigeyuki Yamamoto, Makoto Tsukiji, Kazuki Kubo
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Publication number: 20140028140Abstract: A rotator coil is provided that includes a coil conductor and a mica tape wound a plurality of times around an outer periphery of the coil conductor. The mica tape includes mica paper and a reinforcing member, and has an adhesive resin layer containing an acryloyl-based component and a cyanate ester-based component between the mica paper and the reinforcing members. The reinforcing member, the mica paper, or both, are impregnated with a thermosetting resin composition, and hardened.Type: ApplicationFiled: April 9, 2012Publication date: January 30, 2014Applicant: Mitsubishi Electric CorporationInventors: Takahiro Mabuchi, Shigeyuki Yamamoto, Masahiro Yoshioka, Tomohiro Kojiya
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Patent number: 8578586Abstract: A floating power generation assembly comprises at least three floating units (900) floating on a body of water, and at least three anchors (916) secured to a solid surface beneath the body of water, each of the floating units (900) being provided with a power generator, the floating units (900) being arranged substantially at the vertices of at least one equilateral triangle. Ship-borne apparatus for deploying the floating units of such a power generation assembly and a novel multiple wind turbine assembly are also described.Type: GrantFiled: November 12, 2007Date of Patent: November 12, 2013Inventors: Shigeyuki Yamamoto, Warren E. Colburn
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Patent number: 8530773Abstract: When electric discharging occurs inside a gas insulated apparatus in which sulfur hexafluoride is filled, hydrogen-fluoride gas is generated, which abrades a part formed of glass fiber reinforced plastics included in the apparatus. Previously, resin for preventing the abrasion has been coated on the surface of the part; however, a problem has occurred that the coating film peels off. Organic fiber woven cloth woven using organic fiber such as aramid fiber or the like having hydrogen fluoride resistance and mechanical toughness is wrapped around the surface of glass fiber reinforced plastics, and thermosetting resin is wettably impregnated into weave patterns of the organic fiber woven cloth and then heat cured; thereby, an abrasion-preventing protection layer that does not peel off is formed.Type: GrantFiled: January 28, 2010Date of Patent: September 10, 2013Assignee: Mitsubishi Electric CorporationInventors: Yuji Yoshitomo, Toru Yamashita, Toshie Takeuchi, Makiko Kawada, Takao Tsurimoto, Shigeyuki Yamamoto, Kazuki Kubo, Takashi Miyamoto
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Publication number: 20120189768Abstract: To obtain water-dispersible varnish used in an alternative refrigerant/refrigerating machine oil refrigerant system or a natural refrigerant/refrigerating machine oil refrigerant system, the water-dispersible varnish being capable of solving two problems, namely, reducing the volatile components and the like during thermal curing and resistance of the cured varnish to the refrigerant system. Water-dispersible varnish having a specific thermosetting resin as base polymer, a specific vinyl monomer as reactive diluent, organic peroxide as reaction initiator, and water mixed therein.Type: ApplicationFiled: August 3, 2009Publication date: July 26, 2012Applicants: Ryoden Kasei Co., Ltd., Mitsubishi Electric CorporationInventors: Shigeyuki Yamamoto, Yoshinori Shirafuji, Toshifumi Kanri, Satoru Toyama, Nobuyuki Kamegawa, Yukio Hidaka
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Publication number: 20110315428Abstract: When electric discharging occurs inside a gas insulated apparatus in which sulfur hexafluoride is filled, hydrogen-fluoride gas is generated, which abrades a part formed of glass fiber reinforced plastics included in the apparatus. Previously, resin for preventing the abrasion has been coated on the surface of the part; however, a problem has occurred that the coating film peels off. Organic fiber woven cloth woven using organic fiber such as aramid fiber or the like having hydrogen fluoride resistance and mechanical toughness is wrapped around the surface of glass fiber reinforced plastics, and thermosetting resin is wettably impregnated into weave patterns of the organic fiber woven cloth and then heat cured; thereby, an abrasion-preventing protection layer that does not peel off is formed.Type: ApplicationFiled: January 28, 2010Publication date: December 29, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yuji Yoshitomo, Toru Yamashita, Toshie Takeuchi, Makiko Kawada, Takao Tsurimoto, Shigeyuki Yamamoto, Kazuki Kubo, Takashi Miyamoto