Patents by Inventor Tetsuya Urakawa

Tetsuya Urakawa 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).

  • Patent number: 10626993
    Abstract: The present invention improves the handling properties of a rubber-only gasket and the affixability thereof to an attachment position. To this end, the provided gasket is: obtained by combining a gasket body of the rubber-only type, and a carrier sheet that comprises a resin film and holds the gasket body in an un-adhered state; and characterized in that the gasket body is provided with an adhesive section or bonding section for adhering or bonding the gasket body to an attachment position when attaching the gasket body to the attachment position. The adhesive section or bonding section is prepared by providing the lateral surface of the gasket body with a projecting section, and coating the surface of the projecting section with an adhesive or bonding agent. The gasket body is to be used as a gasket for a fuel cell to be incorporated into a fuel cell stack.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: April 21, 2020
    Assignee: NOK CORPORATION
    Inventors: Hidetoshi Saso, Yoshihiro Kurano, Takayuki Horimoto, Tetsuya Urakawa, Kenichi Oba, Takuro Nishimura, Hajime Yui
  • Patent number: 10625445
    Abstract: Disclosed is a method for manufacturing a substrate-integrated gasket using screen printing. The method includes: a step for forming, on a surface of a substrate by means of screen printing, a coating layer of a paste for forming a gasket; and a step for hardening the coating layer by pressing, at a predetermined height, a coating layer correction member to the coating layer. The cross-sectional shape of the coating layer formed on the surface of the substrate is corrected by means of the coating layer correction member, and in such state, the coating layer hardens to be a gasket, thereby forming a gasket having a highly accurate cross-sectional shape.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: April 21, 2020
    Assignee: NOK CORPORATION
    Inventors: Hajime Yui, Tetsuya Urakawa, Kenichi Oba
  • Patent number: 10465798
    Abstract: The invention provides a gasket which improves a handling workability of a rubber only type gasket. The gasket of the invention is constructed by a combination of a rubber only type gasket main body, and a carrier sheet which is made of a resin film retaining the gasket main body in a non-bonded state, and the carrier sheet is provided with an air inflow port for making air flow into a portion between the carrier sheet and the gasket main body when the gasket main body is detached from the carrier sheet. A gasket retention portion having a three-dimensional shape which is deformed along an outer shape of the gasket main body is arranged at a position which laps over the gasket main body in a plane in the carrier sheet, and the gasket main body is partly accommodated within the gasket retention portion in a thickness direction.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: November 5, 2019
    Assignee: NOK Corporation
    Inventors: Hidetoshi Saso, Yoshihiro Kurano, Takayuki Horimoto, Tetsuya Urakawa, Kenichi Oba, Takuro Nishimura, Hajime Yui
  • Patent number: 10350799
    Abstract: The purpose of this invention is to make it easy to handle all-rubber gaskets. To achieve this purpose, a gasket is characterized in that a gasket body of only rubber is combined with a carrier film that is made from a resin film to hold the gasket body in a non-adhesive state. A three-dimensional portion having a shape that is deformed along the external shape of the gasket body is provided at a position where the gasket body and a plane of the carrier film overlap, and a portion of the gasket body is contained in the three-dimensional section. The gasket body is used as a gasket for fuel cells incorporated into a fuel cell stack.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: July 16, 2019
    Assignee: NOK Corporation
    Inventors: Hidetoshi Saso, Yoshihiro Kurano, Takayuki Horimoto, Tetsuya Urakawa, Kenichi Oba, Takuro Nishimura, Hajime Yui, Takahiro Hayashi
  • Patent number: 10103364
    Abstract: A seal with an integral base material in which a gasket is formed integrally with a film, sheet, or plate-shaped base material, wherein space saving is achieved by making the width of the gasket as small as possible. In order to achieve the foregoing, the following are provided: the film, sheet, or plate-shaped base material; the gasket that is provided integrally with the base material and that is formed of a rubbery elastic material; and a fill layer formed by the rubbery elastic material that is filled into a through hole that is provided in an open state in the base material. A portion of the fill layer is connected to the gasket and another portion extends out from the gasket at substantially the same thickness as the base material.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: October 16, 2018
    Assignee: NOK Corporation
    Inventors: Takayuki Horimoto, Tetsuya Urakawa
  • Publication number: 20180163870
    Abstract: The invention provides a gasket which improves a handling workability of a rubber only type gasket. The gasket of the invention is constructed by a combination of a rubber only type gasket main body, and a carrier sheet which is made of a resin film retaining the gasket main body in a non-bonded state, and the carrier sheet is provided with an air inflow port for making air flow into a portion between the carrier sheet and the gasket main body when the gasket main body is detached from the carrier sheet. A gasket retention portion having a three-dimensional shape which is deformed along an outer shape of the gasket main body is arranged at a position which laps over the gasket main body in a plane in the carrier sheet, and the gasket main body is partly accommodated within the gasket retention portion in a thickness direction.
    Type: Application
    Filed: May 12, 2016
    Publication date: June 14, 2018
    Inventors: Hidetoshi SASO, Yoshihiro KURANO, Takayuki HORIMOTO, Tetsuya URAKAWA, Kenichi OBA, Takuro NISHIMURA, Hajime YUI
  • Publication number: 20180163869
    Abstract: The present invention improves the handling properties of a rubber-only gasket and the affixability thereof to an attachment position. To this end, the provided gasket is: obtained by combining a gasket body of the rubber-only type, and a carrier sheet that comprises a resin film and holds the gasket body in an un-adhered state; and characterized in that the gasket body is provided with an adhesive section or bonding section for adhering or bonding the gasket body to an attachment position when attaching the gasket body to the attachment position. The adhesive section or bonding section is prepared by providing the lateral surface of the gasket body with a projecting section, and coating the surface of the projecting section with an adhesive or bonding agent. The gasket body is to be used as a gasket for a fuel cell to be incorporated into a fuel cell stack.
    Type: Application
    Filed: June 2, 2016
    Publication date: June 14, 2018
    Inventors: Hidetoshi SASO, Yoshihiro KURANO, Takayuki HORIMOTO, Tetsuya URAKAWA, Kenichi OBA, Takuro NISHIMURA, Hajime YUI
  • Publication number: 20180154558
    Abstract: Disclosed is a method for manufacturing a substrate-integrated gasket using screen printing. The method includes: a step for forming, on a surface of a substrate by means of screen printing, a coating layer of a paste for forming a gasket; and a step for hardening the coating layer by pressing, at a predetermined height, a coating layer correction member to the coating layer. The cross-sectional shape of the coating layer formed on the surface of the substrate is corrected by means of the coating layer correction member, and in such state, the coating layer hardens to be a gasket, thereby forming a gasket having a highly accurate cross-sectional shape.
    Type: Application
    Filed: June 2, 2016
    Publication date: June 7, 2018
    Inventors: Hajime YUI, Tetsuya URAKAWA, Kenichi OBA
  • Publication number: 20180099439
    Abstract: The purpose of this invention is to make it easy to handle all-rubber gaskets. To achieve this purpose, a gasket is characterized in that a gasket body of only rubber is combined with a carrier film that is made from a resin film to hold the gasket body in a non-adhesive state. A three-dimensional portion having a shape that is deformed along the external shape of the gasket body is provided at a position where the gasket body and a plane of the carrier film overlap, and a portion of the gasket body is contained in the three-dimensional section. The gasket body is used as a gasket for fuel cells incorporated into a fuel cell stack.
    Type: Application
    Filed: February 17, 2016
    Publication date: April 12, 2018
    Inventors: Hidetoshi SASO, Yoshihiro KURANO, Takayuki HORIMOTO, Tetsuya URAKAWA, Kenichi OBA, Takuro NISHIMURA, Hajime YUI, Takahiro HAYASHI
  • Patent number: 9895835
    Abstract: In order to achieve lower costs in a molding apparatus using a mold by reducing mold cleaning steps following releasing of the product from the mold and shortening the molding cycle, the apparatus is equipped with a plurality of fixed molds and movable molds which are heated to the temperature necessary to harden a molding material and come together by means of clamping to form a cavity, and a non-heated cold runner which supplies the molding material from an injection device to the interior of the cavity via a gate opened in the movable mold, the fixed molds and movable molds being movable between an injection stage where the injection device and cold runner (32) are present and an opening stage near the injection stage.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: February 20, 2018
    Assignee: NOK Corporation
    Inventors: Shotaro Koga, Tetsuya Urakawa, Takeshi Masaka, Yoshihiro Kurano, Shigeru Watanabe, Toshihiro Shimazoe
  • Publication number: 20160288390
    Abstract: In order to achieve lower costs in a molding apparatus using a mold by reducing mold cleaning steps following releasing of the product from the mold and shortening the molding cycle, the apparatus is equipped with a plurality of fixed molds and movable molds which are heated to the temperature necessary to harden a molding material and come together by means of clamping to form a cavity, and a non-heated cold runner which supplies the molding material from an injection device to the interior of the cavity via a gate opened in the movable mold, the fixed molds and movable molds being movable between an injection stage where the injection device and cold runner (32) are present and an opening stage near the injection stage.
    Type: Application
    Filed: March 20, 2014
    Publication date: October 6, 2016
    Applicant: NOK CORPORATION
    Inventors: Shotaro KOGA, Tetsuya URAKAWA, Takeshi MASAKA, Yoshihiro KURANO, Shigeru WATANABE, Toshihiro SHIMAZOE
  • Patent number: 9178226
    Abstract: A fuel cell sealing structure has a power generating body, and first and second separators arranged in both sides in a thickness direction of the power generating body. On a surface in one side in a thickness direction of the first separator, formed integrally first and second sealing protrusions respectively brought into close contact with an outer peripheral portion of the power generating body and the second separator in an outer peripheral side of the first sealing protrusion, and a short circuit prevention rib protruding in line with the first and second sealing protrusions by an electrically insulating rubber-like elastic material. On a surface in another side thereof, formed integrally a third sealing protrusion brought into close contact with a surface in an opposite side to the power generating body in the second separator, by the electrically insulating rubber-like elastic material.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: November 3, 2015
    Assignee: NOK Corporation
    Inventors: Takeshi Masaka, Yoshihiro Kurano, Shinichiro Taguchi, Kenichi Kikuchi, Tetsuya Urakawa
  • Publication number: 20150295210
    Abstract: A seal with an integral base material in which a gasket is formed integrally with a film, sheet, or plate-shaped base material, wherein space saving is achieved by making the width of the gasket as small as possible. In order to achieve the foregoing, the following are provided: the film, sheet, or plate-shaped base material; the gasket that is provided integrally with the base material and that is formed of a rubbery elastic material; and a fill layer formed by the rubbery elastic material that is filled into a through hole that is provided in an open state in the base material. A portion of the fill layer is connected to the gasket and another portion extends out from the gasket at substantially the same thickness as the base material.
    Type: Application
    Filed: October 7, 2013
    Publication date: October 15, 2015
    Inventors: Takayuki Horimoto, Tetsuya Urakawa
  • Patent number: 8986902
    Abstract: A pair of gaskets is integrally formed with seal lips corresponding to each other and extending in the longitudinal direction of the gasket, and side portions disposed on either sides or one side of the seal lip and having a height lower than that of the seal lip. The plate-shaped attachment member includes a through-hole provided at a position where the side portions of the pair of gaskets communicate with each other so as to be formed therethrough in the thickness direction, and the pair of gaskets is integrally formed through the through-hole. An opening shape of the through-hole is set to be an elongated shape in the longitudinal direction of the gasket so as to make a width dimension of each of the side portions as small as possible.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: March 24, 2015
    Assignee: NOK Corporation
    Inventor: Tetsuya Urakawa
  • Publication number: 20120107718
    Abstract: A fuel cell sealing structure has a power generating body, and first and second separators arranged in both sides in a thickness direction of the power generating body. On a surface in one side in a thickness direction of the first separator, formed integrally first and second sealing protrusions respectively brought into close contact with an outer peripheral portion of the power generating body and the second separator in an outer peripheral side of the first sealing protrusion, and a short circuit prevention rib protruding in line with the first and second sealing protrusions by an electrically insulating rubber-like elastic material. On a surface in another side thereof, formed integrally a third sealing protrusion brought into close contact with a surface in an opposite side to the power generating body in the second separator, by the electrically insulating rubber-like elastic material.
    Type: Application
    Filed: May 27, 2010
    Publication date: May 3, 2012
    Applicant: NOK CORPORATION
    Inventors: Takeshi Masaka, Yoshihiro Kurano, Shinichiro Taguchi, Kenichi Kikuchi, Tetsuya Urakawa
  • Publication number: 20110104583
    Abstract: A pair of gaskets is integrally formed with seal lips corresponding to each other and extending in the longitudinal direction of the gasket, and side portions disposed on either sides or one side of the seal lip and having a height lower than that of the seal lip. The plate-shaped attachment member includes a through-hole provided at a position where the side portions of the pair of gaskets communicate with each other so as to be formed therethrough in the thickness direction, and the pair of gaskets is integrally formed through the through-hole. An opening shape of the through-hole is set to be an elongated shape in the longitudinal direction of the gasket so as to make a width dimension of each of the side portions as small as possible.
    Type: Application
    Filed: October 27, 2010
    Publication date: May 5, 2011
    Applicant: NOK CORPORATION
    Inventor: Tetsuya Urakawa
  • Patent number: 7740969
    Abstract: To provide a separator for a fuel battery in which a gasket is integrally formed with rubber in gasket forming grooves provided in a separator main body without the gasket forming grooves being damaged at a time of forming with the rubber and sealing performance being lowered due to the damage of the separator, the separator for the fuel battery is structured such that a groove width of the gasket forming groove formed in one surface of the separator main body is made larger than a groove width of the gasket forming groove formed in the other surface, or groove side surfaces in the gasket forming groove are formed in an inclined shape, or a curvature is provided in corner portions of a groove bottom surface.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: June 22, 2010
    Assignee: NOK Corporation
    Inventors: Tomohiro Inoue, Shigeru Watanabe, Tetsuya Urakawa
  • Publication number: 20060269818
    Abstract: To provide a separator for a fuel battery in which a gasket is integrally formed with rubber in gasket forming grooves provided in a separator main body without the gasket forming grooves being damaged at a time of forming with the rubber and sealing performance being lowered due to the damage of the separator, the separator for the fuel battery is structured such that a groove width of the gasket forming groove formed in one surface of the separator main body is made larger than a groove width of the gasket forming groove formed in the other surface, or groove side surfaces in the gasket forming groove are formed in an inclined shape, or a curvature is provided in corner portions of a groove bottom surface.
    Type: Application
    Filed: July 8, 2004
    Publication date: November 30, 2006
    Inventors: Tomohiro Inoue, Shigeru Watanabe, Tetsuya Urakawa