Patents by Inventor Kazuo Nunokawa
Kazuo Nunokawa 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: 11660634Abstract: A method of producing a rubber seal includes placing a screen with an opening, above a workpiece including a base portion and a bead base protruding from the base portion and applying a liquid material for forming the rubber seal, onto a top part of the bead base through the opening. In the production, the liquid material is applied onto the top part by moving a squeegee along a surface of the screen in a state where a stopper portion is disposed at a position adjacent to the bead base within an area of the base portion and between the screen and the workpiece.Type: GrantFiled: March 11, 2021Date of Patent: May 30, 2023Assignee: Honda Motor Co., Ltd.Inventors: Kazuo Nunokawa, Yasunori Murakami
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Patent number: 11557774Abstract: A metal separator is applied to a fuel cell. A method of producing the metal separator involves performing a plate processing step of forming a bead base, and a rubber seal forming step of providing a rubber seal by screen printing for the bead base formed in the plate processing step. The rubber seal forming step includes a first protrusion forming step of forming a first protrusion at the central part in the width direction of a top portion of the bead base, in a cross sectional view taken along a thickness direction of the rubber seal, and a second protrusion forming step of forming a second protrusion configured to cover the first protrusion after the first protrusion forming step.Type: GrantFiled: March 11, 2021Date of Patent: January 17, 2023Assignee: Honda Motor Co., Ltd.Inventors: Kazuo Nunokawa, Yasunori Murakami
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Patent number: 11431003Abstract: A separator assembly used for a fuel cell includes one pair of metal separators joined together and including a bead seal section including one pair of seal bead portions projecting in opposite directions respectively, an elastic body disposed in the bead seal section, and a first communication hole which extends through the separator assembly in a thickness direction of the separator assembly and which allows a reaction gas or a coolant to flow through the separator assembly. The bead seal section is disposed along an outer periphery of the separator assembly and along a shape of the first communication hole. The elastic body of a predetermined length is disposed in the bead seal section.Type: GrantFiled: December 22, 2020Date of Patent: August 30, 2022Inventors: Kento Suzuki, Kentaro Ishida, Kazuo Nunokawa, Akihito Giga
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Publication number: 20210288340Abstract: A metal separator is applied to a fuel cell. A method of producing the metal separator involves performing a plate processing step of forming a bead base, and a rubber seal forming step of providing a rubber seal by screen printing for the bead base formed in the plate processing step. The rubber seal forming step includes a first protrusion forming step of forming a first protrusion at the central part in the width direction of a top portion of the bead base, in a cross sectional view taken along a thickness direction of the rubber seal, and a second protrusion forming step of forming a second protrusion configured to cover the first protrusion after the first protrusion forming step.Type: ApplicationFiled: March 11, 2021Publication date: September 16, 2021Inventors: Kazuo NUNOKAWA, Yasunori MURAKAMI
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Publication number: 20210283648Abstract: A method of producing a rubber seal includes placing a screen with an opening, above a workpiece including a base portion and a bead base protruding from the base portion and applying a liquid material for forming the rubber seal, onto a top part of the bead base through the opening. In the production, the liquid material is applied onto the top part by moving a squeegee along a surface of the screen in a state where a stopper portion is disposed at a position adjacent to the bead base within an area of the base portion and between the screen and the workpiece.Type: ApplicationFiled: March 11, 2021Publication date: September 16, 2021Inventors: Kazuo NUNOKAWA, Yasunori MURAKAMI
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Publication number: 20210194020Abstract: A separator assembly used for a fuel cell includes one pair of metal separators joined together and including a bead seal section including one pair of seal bead portions projecting in opposite directions respectively, an elastic body disposed in the bead seal section, and a first communication hole which extends through the separator assembly in a thickness direction of the separator assembly and which allows a reaction gas or a coolant to flow through the separator assembly. The bead seal section is disposed along an outer periphery of the separator assembly and along a shape of the first communication hole. The elastic body of a predetermined length is disposed in the bead seal section.Type: ApplicationFiled: December 22, 2020Publication date: June 24, 2021Inventors: Kento SUZUKI, Kentaro ISHIDA, Kazuo NUNOKAWA, Akihito GIGA
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Patent number: 10833338Abstract: Bead seal structure includes an outer bead (bead seal) for preventing leakage of fluid, and a first bypass stop protrusion (intersecting element) which intersects with the outer bead. The first bypass stop protrusion includes a root as a rising start point from a base plate and side walls which rise from the base plate. The radius of curvature of connection parts of the roots connected to the outer bead is larger than the radius of curvature of connection parts of the side walls connected to the outer bead.Type: GrantFiled: October 30, 2018Date of Patent: November 10, 2020Assignee: Honda Motor Co., Ltd.Inventors: Shuhei Goto, Ken Takahashi, Kazuo Nunokawa
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Patent number: 10476086Abstract: A resin-framed stepped membrane electrode assembly for a fuel cell, includes a stepped membrane electrode assembly and a resin frame member. The resin frame member surrounds a membrane outer periphery end of a solid polymer electrolyte membrane and includes an inner protruding portion protruding from the membrane outer periphery end toward a second electrode and is joined to the stepped membrane electrode assembly with an adhesive. The inner protruding portion includes a bank portion, a groove portion, and a ledge portion. The roughness of the bank surface is smaller than a roughness of the groove surface.Type: GrantFiled: March 8, 2017Date of Patent: November 12, 2019Assignee: HONDA MOTOR CO., LTD.Inventors: Eri Terada, Kazuo Nunokawa, Satoru Terada, Masaki Tani, Shintaro Tanaka, Seiji Sugiura
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Publication number: 20190131637Abstract: Bead seal structure includes an outer bead (bead seal) for preventing leakage of fluid, and a first bypass stop protrusion (intersecting element) which intersects with the outer bead. The first bypass stop protrusion includes a root as a rising start point from a base plate and side walls which rise from the base plate. The radius of curvature of connection parts of the roots connected to the outer bead is larger than the radius of curvature of connection parts of the side walls connected to the outer bead.Type: ApplicationFiled: October 30, 2018Publication date: May 2, 2019Inventors: Shuhei GOTO, Ken TAKAHASHI, Kazuo NUNOKAWA
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Patent number: 9966623Abstract: An electrolyte membrane-electrode structure with a resin frame is provided with: an electrolyte membrane-electrode structure that is provided with an anode-side electrode and a cathode-side electrode, with a solid polymer electrolyte membrane being held therebetween; and a resin frame member that is arranged around the outer periphery of the solid polymer electrolyte membrane. An intermediate layer is continuously arranged: between an outer peripheral end portion of the cathode-side electrode and a first inner peripheral end portion of the resin frame member; on an outer peripheral end portion of the solid polymer electrolyte membrane, said outer peripheral end portion being exposed outside the outer peripheral end portion of the cathode-side electrode; and between an outer peripheral end portion of the anode-side electrode and a second inner peripheral end portion of the resin frame member.Type: GrantFiled: September 6, 2012Date of Patent: May 8, 2018Assignee: Honda Motor Co., Ltd.Inventors: Yukihito Tanaka, Kazuo Nunokawa, Hiroshi Sohma, Kenichi Tanaka, Naoki Mitsuta, Masashi Sugishita, Daisuke Okonogi
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Publication number: 20170263952Abstract: A resin-framed stepped membrane electrode assembly for a fuel cell, includes a stepped membrane electrode assembly and a resin frame member. The resin frame member surrounds a membrane outer periphery end of a solid polymer electrolyte membrane and includes an inner protruding portion protruding from the membrane outer periphery end toward a second electrode and is joined to the stepped membrane electrode assembly with an adhesive. The inner protruding portion includes a bank portion, a groove portion, and a ledge portion. The roughness of the bank surface is smaller than a roughness of the groove surface.Type: ApplicationFiled: March 8, 2017Publication date: September 14, 2017Applicant: HONDA MOTOR CO., LTD.Inventors: Eri TERADA, Kazuo NUNOKAWA, Satoru TERADA, Masaki TANI, Shintaro TANAKA, Seiji SUGIURA
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Patent number: 8351115Abstract: A complex type microscopic device includes a slider unit moving a stage, an optical microscope, a scanning electron microscope with an electron axis intersecting with an optical axis of the optical microscope, an optical measurement/observation unit having a magnification between those of the scanning electron microscope and the optical microscope and co-using an objective lens with the optical microscope, and a control unit controlling the entire device, and a display unit having a display screen. During display of a low-magnification optical microscopic image, the control unit controls the display unit to display, on the image, a representation to designate an area to be observed at a magnification of the optical measurement/observation unit, and to display, on the image, another representation to designate an area to be observed at a magnification of the scanning electron microscope during display of a high-magnification optical microscopic image.Type: GrantFiled: October 14, 2009Date of Patent: January 8, 2013Assignee: Kabushiki Kaisha TOPCONInventors: Hisashi Isozaki, Fumio Ohtomo, Kazuo Nunokawa
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Patent number: 8304127Abstract: A fuel cell stack includes a plurality of power generation cells stacked in a direction of gravity. In a cathode side separator of the power generation cell, an oxygen-containing gas discharge passage is connected to an oxygen-containing gas flow field, and a water guide member is provided for the oxygen-containing gas discharge passage for allowing condensed water to be directly dropped in the direction of gravity along the oxygen-containing gas discharge passage. The water guide member is a plate member protruding into the oxygen-containing gas discharge passage and inclined toward the direction of gravity.Type: GrantFiled: February 17, 2010Date of Patent: November 6, 2012Assignee: Honda Motor Co., Ltd.Inventors: Kazuo Nunokawa, So Fujiwara, Seiji Sugiura
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Publication number: 20120120485Abstract: In an interference microscope and a measuring device for observing and inspecting the surface and inside of a specimen such as a wafer by applying laser light to the specimen and using an interferometer, a reference optical path for conducting light is provided between a beam splitter and a reference mirror, and a measurement optical path for conducting light is provided between the beam splitter and the specimen, thereby providing an optical path difference between the reference optical path and the measurement optical path. Further, the reference mirror is tilted slightly, thereby forming interference fringes on detection means. It is possible to measure the surface shape of the specimen (measurement object) such as a wafer only by slightly tilting the reference mirror with a simple configuration and locate the accurate coordinate positions of foreign particles and pole pieces.Type: ApplicationFiled: September 11, 2009Publication date: May 17, 2012Applicant: KABUSHIKI KAISHA TOPCONInventors: Fumio Ootomo, Kazuo Nunokawa, Miyano Nunokawa, Masayuki Momiuchi, Hisashi Isozaki, Kazuhiro Miyakawa
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Patent number: 8043766Abstract: Auxiliary seals are provided on a surface of a first metal separator, between load receivers and an oxygen-containing gas supply passage, a fuel gas supply passage, an oxygen-containing gas discharge passage, and a fuel gas discharge passage, in relatively wide areas. The cross sectional shape of the auxiliary seal is the same as those of a flow field seal and ring-like seals, and the auxiliary seals are formed independently from the flow field seal and the ring-like seals.Type: GrantFiled: April 17, 2008Date of Patent: October 25, 2011Assignee: Honda Motor Co., Ltd.Inventors: Shuhei Goto, Natsuki Anzai, Daisuke Okonogi, Hiroyuki Tanaka, Kazuo Nunokawa, Masaaki Sakano
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Publication number: 20100209798Abstract: A fuel cell stack includes a plurality of power generation cells stacked in a direction of gravity. In a cathode side separator of the power generation cell, an oxygen-containing gas discharge passage is connected to an oxygen-containing gas flow field, and a water guide member is provided for the oxygen-containing gas discharge passage for allowing condensed water to be directly dropped in the direction of gravity along the oxygen-containing gas discharge passage. The water guide member is a plate member protruding into the oxygen-containing gas discharge passage and inclined toward the direction of gravity.Type: ApplicationFiled: February 17, 2010Publication date: August 19, 2010Applicant: HONDA MOTOR CO., LTD.Inventors: Kazuo NUNOKAWA, So FUJIWARA, Seiji SUGIURA
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Patent number: 7758991Abstract: A coolant flow field is formed on a surface of a second metal separator. Further, a rubber bridge dividing the coolant flow field and a coolant supply passage is formed on the surface. The rubber bridge includes a plurality of channels connecting the coolant flow field and the coolant supply passage, a plurality of grooves between the channels, and a partition closing the grooves to prevent the flow of a coolant in the respective grooves.Type: GrantFiled: October 30, 2007Date of Patent: July 20, 2010Assignee: Honda Motor Co., Ltd.Inventors: Shuhei Goto, Kazuo Nunokawa, Takahiro Takeshita, Ken Takahashi, Narutoshi Sugita, Hiroyuki Tanaka
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Publication number: 20100091362Abstract: A complex type microscopic device includes a slider unit moving a stage, an optical microscope, a scanning electron microscope with an electron axis intersecting with an optical axis of the optical microscope, an optical measurement/observation unit having a magnification between those of the scanning electron microscope and the optical microscope and co-using an objective lens with the optical microscope, and a control unit controlling the entire device, and a display unit having a display screen. During display of a low-magnification optical microscopic image, the control unit controls the display unit to display, on the image, a representation to designate an area to be observed at a magnification of the optical measurement/observation unit, and to display, on the image, another representation to designate an area to be observed at a magnification of the scanning electron microscope during display of a high-magnification optical microscopic image.Type: ApplicationFiled: October 14, 2009Publication date: April 15, 2010Inventors: Hisashi Isozaki, Fumio Ohtomo, Kazuo Nunokawa
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Patent number: 7566129Abstract: An ophthalmologic apparatus is disclosed. In one aspect, the apparatus includes an ocular fundus photographing systems for forming an ocular fundus image of the examined eye, based on a reflective beam from the ocular fundus of the examined eye, and an ocular fundus tracking controller for detecting a gaze direction of the examined eye by receiving the reflective beam reflected at a reflective region of an illumination region illuminated on the ocular fundus and for tracking the ocular fundus based on the detection results of the gaze direction. The ocular fundus tracking controller may include scanning mirrors for scanning an area to detect a reflective beam from the ocular fundus, tracking mirrors for controlling tracking to the ocular fundus, an objective lens disposed opposite to the examined, and an offset mirror M19 for adjusting a detection axis in a gaze direction.Type: GrantFiled: June 22, 2007Date of Patent: July 28, 2009Assignee: Kabushiki Kaisha TOPCONInventors: Masayuki Hideshima, Kazuo Nunokawa, Makoto Fujino, Yoichiro Iwa, Akemi Miwa, Yoshiaki Goto, Gaku Takeuchi, Takao Tanabe
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Patent number: 7533990Abstract: An ophthalmologic apparatus is disclosed. In one aspect, the apparatus includes ocular fundus photographing systems for forming an ocular fundus image of the examined eye, based on a reflective beam from the ocular fundus of the examined eye, and a light receiving element for receiving the reflective beam reflected at a reflective region of an illumination region illuminated on the ocular fundus. The apparatus further may include a tracking detector having a scanning unit for detecting a gaze direction of the tested eye, and an ocular fundus tracking controller for tracking the ocular fundus photographing system to the gaze direction.Type: GrantFiled: June 22, 2007Date of Patent: May 19, 2009Assignee: Kabushiki Kaisha TopconInventors: Masayuki Hideshima, Kazuo Nunokawa, Makoto Fujino, Yoichiro Iwa, Akemi Miwa, Yoshiaki Goto, Gaku Takeuchi, Takao Tanabe