Patents by Inventor Yutaka Segawa
Yutaka Segawa 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: 7872417Abstract: A diode chip is sealed by a glass material. There are provided a light emitting diode chip and a glass member in close contact with at least one portion of the surface of the light emitting diode chip. The glass member has a surface shape containing a curved surface at least a portion thereof. The curved surface is preferably a portion of a spherical surface or a spheroidal surface. The glass member has a surface shape containing a spherical portion and a flat portion, and the diode chip is preferably disposed on the flat portion.Type: GrantFiled: October 11, 2007Date of Patent: January 18, 2011Assignee: Asahi Glass Company, LimitedInventors: Nobuhiro Nakamura, Syuji Matsumoto, Hitoshi Onoda, Yutaka Segawa, Tetsuro Matsumoto, Hiroshi Usui
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Publication number: 20080136326Abstract: A diode chip is sealed by a glass material. There are provided a light emitting diode chip and a glass member in close contact with at least one portion of the surface of the light emitting diode chip. The glass member has a surface shape containing a curved surface at least a portion thereof. The curved surface is preferably a portion of a spherical surface or a spheroidal surface. The glass member has a surface shape containing a spherical portion and a flat portion, and the diode chip is preferably disposed on the flat portion.Type: ApplicationFiled: October 11, 2007Publication date: June 12, 2008Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Nobuhiro Nakamura, Syuji Matsumoto, Hitoshi Onoda, Yutaka Segawa, Tetsuro Matsumoto, Hiroshi Usui
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Patent number: 6734615Abstract: The present invention relates to a color cathode ray tube and a glass frit to be used for it, and provides a color cathode ray tube which uses a glass frit containing as a crystallizing filler, an &agr;-4PbO.B2O3 crystal powder and/or a Pb3O4 crystal powder, and corpuscular &agr;-alumina, and at least one member selected from the group consisting of MgO, Fe2O3 and monoclinic ZrO2, for improvement of the strength at a sealed portion and for weight saving of the color cathode ray tube, wherein the maximum tensile stress generated at the above sealed portion is from 7 to 10 MPa when the inside is vacuumized, and the area ratio of crystal is at least 50% at the interface at the above sealed portion at at least the region at which the above maximum tensile stress is generated.Type: GrantFiled: June 5, 2002Date of Patent: May 11, 2004Assignee: Asahi Glass Company, LimitedInventors: Tsunehiko Sugawara, Yutaka Segawa, Ryuichi Tanabe, Eiji Ichikura
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Publication number: 20030067261Abstract: The present invention relates to a color cathode ray tube and a glass frit to be used for it, and provides a color cathode ray tube which uses a glass frit containing as a crystallizing filler, an &agr;-4PbO.B2O3 crystal powder and/or a Pb3O4 crystal powder, and corpuscular &agr;-alumina, and at least one member selected from the group consisting of MgO, Fe2O3 and monoclinic ZrO2, for improvement of the strength at a sealed portion and for weight saving of the color cathode ray tube, wherein the maximum tensile stress generated at the above sealed portion is from 7 to 10 MPa when the inside is vacuumized, and the area ratio of crystal is at least 50% at the interface at the above sealed portion at at least the region at which the above maximum tensile stress is generated.Type: ApplicationFiled: June 5, 2002Publication date: April 10, 2003Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Tsunehiko Sugawara, Yutaka Segawa, Ryuichi Tanabe, Eiji Ichikura
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Patent number: 6387833Abstract: A sealing composition having at least one member from &agr;-4PbO.B2O3 crystal powder and Pb3O4 powder incorporated in a total amount of from 0.0001 to 3 parts by weight to 100 parts by weight of a composition comprising at least 80 wt % and less than 98.99 wt % of a powder of PbO—ZnO—B2O3—SiO2 type crystalline low melting point glass, from 0.01 to 5 wt % of a zircon powder, more than 1 wt % and not more than 19.99 wt % of an &agr;-alumina powder and from 0 to 10 wt % of a low expansion ceramic filler.Type: GrantFiled: August 2, 2000Date of Patent: May 14, 2002Assignee: Asahi Glass Company, LimitedInventors: Ryuichi Tanabe, Hiroshi Usui, Yutaka Segawa, Yuichi Kuroki, Eiji Ichikura
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Patent number: 6324134Abstract: Conventional disk recording and reproducing apparatuses have addressed a shortcoming that they cannot correct squareness errors and misalignments caused by the warpage of a disk and the eccentricity of the center hole of the disk and of the center of curvature of signal tracks. To overcome this shortcoming, a disk recording and reproducing apparatus of the present invention comprises: magnetic bearing means capable of supporting a rotary body and adjusting a relative position of the rotary body; a pickup for irradiating, with a laser beam, a recording surface of a disk mounted on a table arranged on the rotary body and receiving the laser beam reflected by the recording surface; detection means for calculating a relative positional relationship between the disk and a focal position of the laser beam based on a signal from the pickup; and control means for adjusting the position of the rotary body by controlling the magnetic bearing means.Type: GrantFiled: August 4, 1999Date of Patent: November 27, 2001Assignee: Seiko Instruments Inc.Inventors: Yoshinobu Ohtachi, Hirotaka Namiki, Akira Shimada, Yutaka Segawa, Ikuo Muto
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Patent number: 5964916Abstract: A mold for forming glass, which comprises a mold body made of stainless steel and having a mold surface comprising a sidewall portion and a face portion continuous from the sidewall portion, a coating film of ductile material formed on the sidewall portion, and a coating film of high hardness material having oxidation resistance, formed on the face portion.Type: GrantFiled: April 30, 1998Date of Patent: October 12, 1999Assignee: Asahi Glass Company Ltd.Inventors: Yutaka Segawa, Toshihiro Ohashi
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Patent number: 5938806Abstract: A spray device which is provided with a nozzle for spraying a lubricant is arranged in proximity to a bottom mold and/or a plunger, and the nozzle is operated and controlled by a control device to spray the lubricant on a mold surface of the bottom mold and/or the plunger.Type: GrantFiled: February 11, 1998Date of Patent: August 17, 1999Assignee: Asahi Glass Company Ltd.Inventors: Shinya Mine, Yutaka Segawa, Masao Tamura
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Patent number: 5865884Abstract: A glass forming lubricant comprising an organic titanate or an organic phospherous ester calcium salt as a lubricant agent.Type: GrantFiled: May 1, 1997Date of Patent: February 2, 1999Assignees: Asahi Glass Company Ltd., Chukyo Kasei Kogyo Co., Ltd.Inventors: Yutaka Segawa, Yukio Morisawa, Ryoji Nishizawa, Norio Doi
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Patent number: 5785727Abstract: A spray device which is provided with a nozzle for spraying a lubricant is arranged in proximity to a bottom mold and/or a plunger, and the nozzle is operated and controlled by a control device to spray the lubricant on a mold surface of the bottom mold and/or the plunger.Type: GrantFiled: January 3, 1997Date of Patent: July 28, 1998Assignee: Asahi Glass Company Ltd.Inventors: Shinya Mine, Yutaka Segawa, Masao Tamura
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Patent number: 5628807Abstract: A glass forming mold which comprises a substrate made of stainless steel and a coating comprising the following components formed as the outermost surface coating on the substrate: (1) from 40 to 94 wt % of nickel and/or cobalt as component A; (2) from 5 to 59 wt % of tungsten as component B; and (3) from 0.5 to 40 wt % of at least one transition element having a melting point of at least 2,200.degree. C. as component C.Type: GrantFiled: August 3, 1995Date of Patent: May 13, 1997Assignee: Asahi Glass Company Ltd.Inventors: Masaru Yoshitake, Eiji Yanagisawa, Naoki Yoshida, Masuo Sugisaki, Atsuyoshi Takenaka, Yutaka Segawa, Toshihiro Ohashi, Hiroshi Wakatsuki
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Patent number: 4678759Abstract: A ZrB.sub.2 composite sintered material consisting essentially of at least 1% by weight of SiC, at least 1% by weight of BN, at most 20% by weight of AlN, at most 20% by weight of B.sub.4 C, the rest being substantially ZrB.sub.2, provided that the total amount of SiC and BN is from 2 to 50% by weight.Type: GrantFiled: October 7, 1986Date of Patent: July 7, 1987Assignee: Asahi Glass Company Ltd.Inventors: Otojiro Kida, Yutaka Segawa
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Patent number: 4668643Abstract: A ZrB.sub.2 composite sintered material consisting essentially of at least 1% by weight of SiC, at least 1% by weight of BN, at most 20% by weight of AlN, at most 20% by weight of B.sub.4 C, the rest being substantially ZrB.sub.2, provided that the total amount of SiC and BN is from 2 to 50% by weight.Type: GrantFiled: June 28, 1985Date of Patent: May 26, 1987Assignee: Asahi Glass Company, Ltd.Inventors: Otojiro Kida, Yutaka Segawa
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Patent number: 4636481Abstract: A ZrB.sub.2 composite sintered material consisting essentially of at least 1% by weight of SiC, at least 1% by weight of B.sub.4 C, at most 15% by weight of TiC, at most 35% by weight of TiN, at most 40% by weight of AlN, the rest being substantially ZrB.sub.2, provided that the total amount of SiC and B.sub.4 C is from 2 to 50% by weight.Type: GrantFiled: July 3, 1985Date of Patent: January 13, 1987Assignee: Asahi Glass Company Ltd.Inventors: Otojiro Kida, Yutaka Segawa