Patents by Inventor Yuki Aoki

Yuki Aoki 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: 8773421
    Abstract: A multiplexer receives multiple differential signals, selects one differential signal, and outputs, via an output port, the differential signal thus selected. The multiple differential signals are respectively input to multiple differential input ports. Multiple buffers are respectively provided to the multiple differential input ports. Each buffer includes a differential input terminal connected to a corresponding differential input port, and a differential output terminal connected to an output port. Each buffer is configured to be capable of switching states, according to the control signal, between an enable state in which a differential signal that corresponds to a differential signal input to the differential input terminal is output, and a disable state in which current consumed by the buffer becomes substantially zero, and the differential output terminal thereof is set to a high-impedance state.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: July 8, 2014
    Assignee: Rohm Co., Ltd.
    Inventors: Kimio Ando, Yuki Aoki
  • Publication number: 20130310248
    Abstract: Provided is an exhaust gas purification catalyst (10) that has a substrate (11), a lower catalyst layer (12) that is formed on the substrate and contains at least one of Pd and Pt, and an upper catalyst layer (13) that is formed on the lower catalyst layer and contains Rh. A region that does not contain the upper catalyst layer is disposed on the exhaust gas upstream side of this exhaust gas purification catalyst, and the lower catalyst layer is formed of a front-stage lower catalyst layer (12a) on the exhaust gas upstream side and a rear-stage lower catalyst layer (12b) on the exhaust gas downstream side. The Front-stage lower, catalyst layer contains an oxygen storage material.
    Type: Application
    Filed: January 26, 2012
    Publication date: November 21, 2013
    Inventors: Yuki Aoki, Takeshi Nobukawa
  • Patent number: 8580705
    Abstract: An exhaust gas purifying catalyst includes a substrate that defines an exhaust gas passage; a lower catalyst layer formed over the substrate, and an upper catalyst layer formed over the lower catalyst layer. The lower catalyst layer has a lower catalytic precious metal that contains at least one of Pt and Pd, and a lower-layer carrier that supports the lower catalytic precious metal. The upper catalyst layer has an upper catalytic precious metal that contains Rh, and an upper-layer carrier that supports the upper catalytic precious metal. The upper-layer carrier includes an inorganic mixed oxide that contains Ce, Zr, Al, Nd, and at least one element selected from the group consisting of rare earth elements other than Ce and alkaline earth elements. The Nd is unevenly distributed in covering layers that covers surfaces of interior regions within the inorganic mixed oxide.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: November 12, 2013
    Assignees: Toyota Jidosha Kabushiki Kaisha, Cataler Corporation, Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Yuki Aoki, Takeru Yoshida, Shingo Sakagami, Masaaki Kawai, Miho Hatanaka, Toshitaka Tanabe, Naoki Takahashi
  • Patent number: 8501661
    Abstract: A catalyst for purifying exhaust gases includes a substrate, and a catalytic layer. The catalytic layer includes a lower catalytic layer, a first upper catalytic layer, and a second upper catalytic layer. The lower catalytic layer being loaded with Pd and/or Pt is formed on the substrate. The first upper catalytic layer being loaded with Pd covers an upstream side of the lower catalytic layer, and exhibits a concentration of loaded Pd that falls in a range of from 4.5 to 12% by mass when the entirety of the first upper catalytic layer is taken as 100% by mass. The second upper catalytic layer being loaded with Rh covers a downstream side of the lower catalytic layer.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: August 6, 2013
    Assignees: Toyota Jidosha Kabushiki Kaisha, Cataler Corporation
    Inventors: Tomoaki Sunada, Hideaki Ueno, Yuki Aoki, Takeru Yoshida, Masahiro Nakahara, Masaaki Kawai, Singo Sakagami
  • Publication number: 20130143732
    Abstract: The object of the invention is to provide an exhaust gas purifying catalyst having a high oxygen storage capacity without changing the usage amount of the oxygen storage component. According to the present invention, the exhaust gas purifying catalyst containing (a) a ceria-zirconia composite oxide containing ceria in a higher amount than zirconia, (b) a ceria-zirconia composite oxide containing zirconia in a higher amount than ceria, and (c) a ceria-zirconia composite oxide having a pyrochlore-type regular array structure is provided. The exhaust gas purifying catalyst of the present invention has a higher oxygen storage capacity than conventional catalysts and is effective in reducing the amount of NOx emission.
    Type: Application
    Filed: November 15, 2012
    Publication date: June 6, 2013
    Inventor: Yuki AOKI
  • Publication number: 20130029838
    Abstract: An exhaust gas purifying catalyst includes a substrate that defines an exhaust gas passage; a lower catalyst layer formed over the substrate, and an upper catalyst layer formed over the lower catalyst layer. The lower catalyst layer has a lower catalytic precious metal that contains at least one of Pt and Pd, and a lower-layer carrier that supports the lower catalytic precious metal. The upper catalyst layer has an upper catalytic precious metal that contains Rh, and an upper-layer carrier that supports the upper catalytic precious metal. The upper-layer carrier includes an inorganic mixed oxide that contains Ce, Zr, Al, Nd, and at least one element selected from the group consisting of rare earth elements other than Ce and alkaline earth elements. The Nd is unevenly distributed in covering layers that covers surfaces of interior regions within the inorganic mixed oxide.
    Type: Application
    Filed: December 23, 2010
    Publication date: January 31, 2013
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, CATALER CORPORATION
    Inventors: Yuki Aoki, Takeru Yoshida, Shingo Sakagami, Masaaki Kawai, Miho Hatanaka, Toshitaka Tanabe, Naoki Takahashi
  • Publication number: 20120283091
    Abstract: A catalyst for purifying exhaust gases includes a substrate, and a catalytic layer. The catalytic layer includes a lower catalytic layer, a first upper catalytic layer, and a second upper catalytic layer. The lower catalytic layer being loaded with Pd and/or Pt is formed on the substrate. The first upper catalytic layer being loaded with Pd covers an upstream side of the lower catalytic layer, and exhibits a concentration of loaded Pd that falls in a range of from 4.5 to 12% by mass when the entirety of the first upper catalytic layer is taken as 100% by mass. The second upper catalytic layer being loaded with Rh covers a downstream side of the lower catalytic layer.
    Type: Application
    Filed: December 27, 2010
    Publication date: November 8, 2012
    Inventors: Tomoaki Sunada, Hideaki Ueno, Yuki Aoki, Takeru Yoshida, Masahiro Nakahara, Masaaki Kawai, Singo Sakagami
  • Publication number: 20110273431
    Abstract: A multiplexer receives multiple differential signals, selects one differential signal, and outputs, via an output port, the differential signal thus selected. The multiple differential signals are respectively input to multiple differential input ports. Multiple buffers are respectively provided to the multiple differential input ports. Each buffer includes a differential input terminal connected to a corresponding differential input port, and a differential output terminal connected to an output port. Each buffer is configured to be capable of switching states, according to the control signal, between an enable state in which a differential signal that corresponds to a differential signal input to the differential input terminal is output, and a disable state in which current consumed by the buffer becomes substantially zero, and the differential output terminal thereof is set to a high-impedance state.
    Type: Application
    Filed: February 23, 2011
    Publication date: November 10, 2011
    Applicant: ROHM CO., LTD.
    Inventors: Kimio ANDO, Yuki AOKI
  • Patent number: 8043992
    Abstract: A particulate inorganic mixed oxide comprising: aluminum; zirconium; cerium; lanthanum and an additional element selected from the group consisting of neodymium and praseodymium, wherein the inorganic mixed oxide has at least 80% of primary particles with article diameters of 100 nm or less, and at least a part of the primary particles have an enriched surface region where the additional element is locally increased in a surface layer portion thereof.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: October 25, 2011
    Assignees: Kabushiki Kaisha Toyota Chuo Kenkyusho, Toyota Jidosha Kabushiki Kaisha, Cataler Corporation
    Inventors: Miho Hatanaka, Toshitaka Tanabe, Naoki Takahashi, Takeru Yoshida, Yuki Aoki
  • Publication number: 20100227757
    Abstract: A particulate inorganic mixed oxide comprising: aluminum; zirconium; cerium; and first and second additional elements each selected from the group consisting of rare earth elements other than cerium and alkaline earth elements, wherein a content of aluminum in the inorganic mixed oxide is 60 to 90 at %, in terms of element content, relative to a total amount of elements which form cations in the inorganic mixed oxide ; a content of cerium in the inorganic mixed oxide is 0.
    Type: Application
    Filed: October 17, 2008
    Publication date: September 9, 2010
    Applicants: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Miho Hatanaka, Toshitaka Tanabe, Naoki Takahashi, Takeru Yoshida, Yuki Aoki