Patents by Inventor Yumi Masuoka
Yumi Masuoka 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: 7153412Abstract: Electrode having high activity to oxygen gas and low activity to flammable gas is provided. An oxygen pump includes oxide-ion conductive solid electrolyte 2, electrode 8 which is an inactive electrode, and active electrode 10. Electrode 8 is an electrode that includes Ce0.8Sm0.2O2-?. Electrode 8 is disposed on the gas detection chamber 12 side of solid electrolyte 2. Active electrode 10 is disposed on the open space side of solid electrolyte 2. Gas detection chamber 12 is an enclosed space defined by solid electrolyte 2, insulation layers 6, and diffusion control layer 4.Type: GrantFiled: December 26, 2002Date of Patent: December 26, 2006Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Tadashi Inaba, Keiichi Saji, Tadashi Nakamura, Yumi Masuoka, Jiro Sakata
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Patent number: 7021154Abstract: A force sensing element is provided with a gauge portion and a plurality of electrodes. The gauge portion is formed of an n-type semiconductor substrate whose (100)-face serves as a main face, a p-type semiconductor substrate whose (110)-face serves as a main face, or a p-type semiconductor substrate whose (111)-face serves as a main face, and is pressed in a thickness direction of the semiconductor substrate upon receiving a force. The electrodes are electrically connected to the gauge portion such that a current path extending in a direction corresponding to the thickness direction of the semiconductor substrate is formed in the gauge portion. The force sensing element thus constructed makes it possible to detect a force with high precision.Type: GrantFiled: September 11, 2003Date of Patent: April 4, 2006Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Shoji Hashimoto, Kouji Tsukada, Kentaro Mizuno, Jiro Sakata, Yoshiteru Omura, Yumi Masuoka
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Patent number: 6865953Abstract: A pressure sensor has a housing having a first block and a second block provided therein. A force to be measured applies upon a upper face of the first block. An upper face of the second block makes contact with a base face of the first block. Piezoresistive elements are formed within the base face of the first block. The resistance values of these piezoresistive elements change as contacting pressure between the first block and the second block changes. A first electrode is formed on an upper face of the first block. A second electrode is formed on a base face of the second block. Electrical characteristics between the first electrode and the second electrode change following change in the contacting pressure between the first block and the second block.Type: GrantFiled: March 14, 2003Date of Patent: March 15, 2005Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Kouji Tsukada, Jiro Sakata, Kentaro Mizuno, Yoshiteru Omura, Yumi Masuoka, Shoji Hashimoto
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Publication number: 20040055390Abstract: A force sensing element is provided with a gauge portion and a plurality of electrodes. The gauge portion is formed of an n-type semiconductor substrate whose (100)-face serves as a main face, a p-type semiconductor substrate whose (110)-face serves as a main face, or a p-type semiconductor substrate whose (111)-face serves as a main face, and is pressed in a thickness direction of the semiconductor substrate upon receiving a force. The electrodes are electrically connected to the gauge portion such that a current path extending in a direction corresponding to the thickness direction of the semiconductor substrate is formed in the gauge portion. The force sensing element thus constructed makes it possible to detect a force with high precision.Type: ApplicationFiled: September 11, 2003Publication date: March 25, 2004Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Shoji Hashimoto, Kouji Tsukada, Kentaro Mizuno, Jiro Sakata, Yoshiteru Omura, Yumi Masuoka
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Publication number: 20030177839Abstract: A pressure sensor has a housing having a first block and a second block provided therein. A force to be measured applies upon a upper face of the first block. An upper face of the second block makes contact with a base face of the first block. Piezoresistive elements are formed within the base face of the first block. The resistance values of these piezoresistive elements change as contacting pressure between the first block and the second block changes. A first electrode is formed on an upper face of the first block. A second electrode is formed on a base face of the second block. Electrical characteristics between the first electrode and the second electrode change following change in the contacting pressure between the first block and the second block.Type: ApplicationFiled: March 14, 2003Publication date: September 25, 2003Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Kouji Tsukada, Jiro Sakata, Kentaro Mizuno, Yoshiteru Omura, Yumi Masuoka, Shoji Hashimoto
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Patent number: 6607643Abstract: A NOx gas detecting apparatus including an oxygen pumping cell for removing oxygen from a measurement gas, and a NOx detecting cell positioned downstream from the oxygen pumping cell to detect concentration of NOx in the measurement gas, the NOx detecting cell being configured to measure current which flows when oxygen generated from reducing NOx is pumped, wherein the NOx detecting cell has a NOx detecting cathode made of an electrode material including at least one alloy selected from the group consisting of a Pt-Pd alloy, a Pt-Au-Pd alloy, and a Pt-Pd-Rh alloy.Type: GrantFiled: February 28, 2001Date of Patent: August 19, 2003Assignees: Kabushiki Kaisha Toyota Chuo Kenkyusho, Denso CorporationInventors: Hideaki Takahashi, Keiichi Saji, Jiro Sakata, Tadashi Inaba, Tadashi Nakamura, Yumi Masuoka, Toshitaka Saito, Akio Tanaka
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Publication number: 20030121801Abstract: Electrode having high activity to oxygen gas and low activity to flammable gas is provided. An oxygen pump includes oxide-ion conductive solid electrolyte 2, electrode 8 which is an inactive electrode, and active electrode 10. Electrode 8 is an electrode that includes Ce0.8Sm0.2O2-&agr;. Electrode 8 is disposed on the gas detection chamber 12 side of solid electrolyte 2. Active electrode 10 is disposed on the open space side of solid electrolyte 2. Gas detection chamber 12 is an enclosed space defined by solid electrolyte 2, insulation layers 6, and diffusion control layer 4.Type: ApplicationFiled: December 26, 2002Publication date: July 3, 2003Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Tadashi Inaba, Keiichi Saji, Tadashi Nakamura, Yumi Masuoka, Jiro Sakata
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Publication number: 20010023823Abstract: Disclosed is a NOx gas detecting apparatus which is capable of detecting a NOx gas at a low concentration with high accuracy over a long period of time even if Au or impurities contained in exhaust gas adheres to a cathode of a NOx detecting cell, and which is excellent in startability and responsivity. The NOx detecting apparatus comprises an oxygen pumping cell for removing oxygen from a measurement gas, and a NOx detecting cell. The NOx detecting cell includes, as a cathode, a cermet electrode composed of a Pt-Pd alloy, a Pt-Au-Pd alloy, or a Pt-Pd-Rh alloy along with a ceramic component. An addition amount of Pd to the alloy is preferably from 1 to 90 wt %. A weight ratio of Pd to Au in the Pt-Au-Pd alloy is preferably not less than 1.67. An addition amount of Rh in the Pt-Pd-Rh alloy is not more than 30 wt %.Type: ApplicationFiled: February 28, 2001Publication date: September 27, 2001Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Hideaki Takahashi, Keiichi Saji, Jiro Sakata, Tadashi Inaba, Tadashi Nakamura, Yumi Masuoka, Toshitaka Saito, Akio Tanaka