Patents by Inventor Yuichi Kuroki

Yuichi Kuroki 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).

  • Publication number: 20040096730
    Abstract: In order to reduce an assembling man hour of the constituting part for the fuel battery and prevent wrinkles from being generated in an electrolyte membrane, in a constituting part for a fuel battery having electrodes with catalyst in both pole sides of an electrolyte membrane and provided with gas diffusion layers for promoting diffusion of gas in both outer sides thereof, an integrated product between the gas diffusion layers and the gasket, the gas diffusion layers being made of a carbon fiber or the like and impregnated with a rubber, and forming gaskets is bonded to an integrated product of the electrolyte membrane and the electrodes with catalyst by using a hot press.
    Type: Application
    Filed: March 19, 2003
    Publication date: May 20, 2004
    Inventors: Yuichi Kuroki, Tomohiro Inoue
  • Patent number: 6726211
    Abstract: A sealing device including a fitting portion fixed on a first surface forming an annular gap with a second surface; and a seal supported by a support provided at the fitting portion and including a plurality of axial lips whose tips come into contact with the second surface. The annular gap is sealed for the purpose of isolating a sealed side and a non-sealed side, and ribs for pumping a sealing fluid to the sealed side are formed on the lips at the non-sealed side.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: April 27, 2004
    Assignee: NOK Corporation
    Inventors: Yuichi Kuroki, Akira Yamaguchi
  • Publication number: 20040075224
    Abstract: In order to provide a gasket which has a good handling property as a gasket used for a fuel battery or a gasket for an HDD, can be easily integrated with the other end mounting member even in the case that the other end mounting member such as a separator or the like is a material having low strength or a thin plate, and has good mounting workability, a gasket is having a sheet-shaped gasket mounting member provided with a sticking function on one face, and a gasket main body made of a rubber-type elastic member integrated with the sheet-shaped gasket mounting member, and the gasket is mounted to the other end mounting member on the basis of the sticking function of the sheet-shaped gasket mounting member.
    Type: Application
    Filed: August 7, 2003
    Publication date: April 22, 2004
    Inventors: Yuichi Kuroki, Kazuhisa Senda, Yoshihiro Kurano, Tomohiro Inoue
  • Publication number: 20030104262
    Abstract: In order to provide a constituting part for a fuel battery in which a number of steps of assembling the constituting parts for the fuel battery can be reduced, and in which a replacing property and a maintenance property of fuel battery cell parts can be improved and a cost for parts can be reduced, the structure is made such that a separator made of a carbon plate or the like, a gas diffusion layer made of a carbon fiber or the like, and a gasket made of a liquid rubber cured material or the like are integrally formed, and further, gaskets are respectively provided on both surfaces of a pair of gas diffusion layers holding an independent electrolyte membrane from both sides thereof between the pair.
    Type: Application
    Filed: November 13, 2002
    Publication date: June 5, 2003
    Inventors: Yuichi Kuroki, Yoshihiro Kurano, Tomohiro Inoue
  • Publication number: 20030076027
    Abstract: A glass panel for a color cathode ray tube, which has a linear absorption coefficient of X-ray with a wavelength of 0.06 nm of from 30 to 38 cm−1 and which has a layer having a compression stress of at least 70 MPa formed by a chemical strengthening method at least at short axis end portions and/or long axis end portions of the outer surface of a face portion and at a center portion of the inner surface of the face portion.
    Type: Application
    Filed: May 7, 2002
    Publication date: April 24, 2003
    Applicant: ASAHI GLASS COMPANY LIMITED
    Inventors: Yuichi Kuroki, Tsunehiko Sugawara
  • Patent number: 6521024
    Abstract: To prevent a pressure container of a battery, a condenser or the like from exploding due to an abnormal increase of a pressure within the pressure container without having a rubber breaking plate with which it is hard to control the breaking pressure, there is provided a breaking plate integrally formed with a resin seal plate main body for closing an opening portion of a pressure container, a thin portion integrally formed between the seal plate main body and the breaking plate and being thinner than the breaking plate, and an inclined surface portion formed to be gradually thicker from a thickness of the thin portion and provided in a peripheral edge portion of the breaking plate.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: February 18, 2003
    Assignee: NOK Corporation
    Inventors: Masami Akahori, Jo Matsune, Koichi Ohno, Zituhiko Hayashi, Koichi Yokose, Yuichi Kuroki
  • Publication number: 20030013000
    Abstract: In order to make it possible to specify a cell or a module generating an abnormality in a power generating performance (a voltage, a current and the like) without dissembling a fuel battery stack, a gasket for a fuel battery having gaskets on both surfaces of a print circuit for taking out an electric signal within the cell or the module is held between separators, and an electric signal take-out portion for taking out an electric signal (the voltage, the current and the like) is integrally assembled together with a seal.
    Type: Application
    Filed: February 25, 2002
    Publication date: January 16, 2003
    Inventor: Yuichi Kuroki
  • Patent number: 6387833
    Abstract: 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: Grant
    Filed: August 2, 2000
    Date of Patent: May 14, 2002
    Assignee: Asahi Glass Company, Limited
    Inventors: Ryuichi Tanabe, Hiroshi Usui, Yutaka Segawa, Yuichi Kuroki, Eiji Ichikura
  • Patent number: 6251811
    Abstract: A funnel glass containing PbO for a cathode ray tube, wherein when the composition is represented by wt % based on oxides, the content of SrO is at least 1.0 wt %, the content of BaO is at least 1.0 wt %, and the ratio of the content of PbO to the total amount of PbO, SrO, BaO, CaO and MgO, is at most 0.69, and whereby the lead elution A of the glass as measured by the following method A is at most 1.0 &mgr;g/cm2, and the X-ray absorption coefficient at a wavelength of 0.6 Å is at least 40 cm−1: Method A: The glass is immersed in distilled and deionized water at 90° C. for 20 hours, whereupon the glass is taken out, and the amount of lead in the distilled and deionized water is measured by inductively coupled plasma emission spectrometry, and the measured value of the amount of lead is divided by the surface area of the glass, and the product is taken as the lead elution A.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: June 26, 2001
    Assignee: Asahi Glass Company Ltd.
    Inventors: Osamu Yanagisawa, Yuichi Kuroki, Ryousuke Akagi
  • Patent number: 6163106
    Abstract: A color cathode ray tube having a panel glass and a funnel glass sealed with a composition comprising a low melting glass containing PbO as the main component, wherein the sealed portion is such that the weight reduction after being immersed in water at 90.degree. C. for 20 hours, is at most 1 mg/cm.sup.2, and the weight reduction after being immersed in a 10% nitric acid solution at 40.degree. C. for 20 minutes, is from 80 to 700 mg/cm.sup.2.
    Type: Grant
    Filed: August 28, 1998
    Date of Patent: December 19, 2000
    Assignee: Asahi Glass Company Ltd.
    Inventors: Tsunehiko Sugawara, Yuichi Kuroki, Hirosi Usui, Ryuichi Tanabe, Tsuneo Manabe
  • Patent number: 5916832
    Abstract: A hermetic sealing composition consisting essentially of from 90 to 99.95 wt % of a crystalline low melting glass powder and from 0.05 to 10 wt % of a low expansion ceramic filler powder, and having an average thermal expansion coefficient after firing of from 80.times.10.sup.-7 to 110.times.10.sup.-7 /.degree.C. within a range of from room temperature to 300.degree. C., wherein the crystalline low melting glass consists essentially of:______________________________________ PbO 71.5 to 78.0 wt % ZnO 10.5 to 14.5 wt % B.sub.2 O.sub.3 7.0 to 10.0 wt % SiO.sub.2 1.65 to 3.0 wt % BaO 0.1 to 1.95 wt % SrO 0 to 1.5 wt % CaO 0 to 1.5 wt % BaO + SrO + CaO 0.5 to 1.95 wt %, ______________________________________and contains substantially no fluorine, and the weight ratio of ZnO/PbO is within a range of from 0.14 to 0.20.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: June 29, 1999
    Assignee: Asahi Glass Company Ltd.
    Inventors: Ryuichi Tanabe, Hiroshi Usui, Tsuneo Manabe, Yuichi Kuroki
  • Patent number: 5821182
    Abstract: A hermetic sealing composition comprising 100 parts by weight of a basic composition consisting of from 80 to 99.9 wt % of a crystalline low melting glass powder containing lead and boron and from 0.1 to 20 wt % of a low expansion ceramic filler, and from 0.001 to 1.0 part by weight, in total, of at least one of an .alpha.-4PbO.B.sub.2 O.sub.3 crystal powder and a Pb.sub.3 O.sub.4 powder, incorporated to the basic composition, the thermal expansion coefficient of the sealing composition after firing being from 80.times.10.sup.-7 to 105.times.10.sup.-7 /.degree.C. within a range of from room temperature to 300.degree. C.
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: October 13, 1998
    Assignees: Asahi Glass Company Ltd., Iwaki Glass Company Ltd.
    Inventors: Ryuichi Tanabe, Satoshi Rokudai, Yuichi Kuroki, Akira Nakamura
  • Patent number: 5683948
    Abstract: A hermetic sealing composition comprising 100 parts by weight of a basic composition consisting of from 80 to 99.9 wt % of a crystalline low melting glass powder containing lead and boron and from 0.1 to 20 wt % of a low expansion ceramic filler, and from 0.001 to 1.0 part by weight, in total, of at least one of an .alpha.-4PbO.B.sub.2 O.sub.3 crystal powder and a Pb.sub.3 O.sub.4 powder, incorporated to the basic composition, the thermal expansion coefficient of the sealing composition after firing being from 80.times.10.sup.-7 to 105.times.10.sup.-7 /.degree.C. within a range of from room temperature to 300.degree. C.
    Type: Grant
    Filed: July 30, 1996
    Date of Patent: November 4, 1997
    Assignees: Asahi Glass Company Ltd., Iwaki Glass Company Ltd.
    Inventors: Ryuichi Tanabe, Satoshi Rokudai, Yuichi Kuroki, Akira Nakamura